The black isolines are contours of constant solar elevation. The change in length of daylight between today and tomorrow is also listed when available. Thank you for reporting this station. Partly Cloudy with Thunderstorms Likely with a high near, Partly Cloudy with Chance of Storms with a low around, Partly Cloudy with Chance of Storms with a high near, Partly Cloudy with Isolated Storms with a low around, 7 Day and Night - QPF Forecast for Montevallo, AL, 7 Day and Night - Maximum Wind Speed Forecast for Montevallo, AL, 7 Day and Night - Maximum Humidity Forecast for Montevallo, AL, 7 Day and Night - Snowfall Totals Forecast for Montevallo, AL, 7 Day and Night - Ice Accumulation Forecast for Montevallo, AL. Please note that each source's contribution is adjusted for elevation and the relative change present in the MERRA-2 data. The hot season lasts for 3.9 months, from May 24 to September 21, with an average daily high temperature above 83F. Typically, light rain is occurring when the dBZ value reaches 20. To show variation within the months and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day of the year. The cloudier part of the year begins around November 24 and lasts for 7.9 months, ending around July 22. We recognize our responsibility to use data and technology for good. The length of the day in Montevallo varies significantly over the course of the year. Maps are Esri, with data from National Geographic, Esri, DeLorme, NAVTEQ, UNEP-WCMC, USGS, NASA, ESA, METI, NRCAN, GEBCO, NOAA, and iPC.
The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Low 76F. Notice the color on each scale remains the same in both operational modes, only the values change. This reanalysis combines a variety of wide-area measurements in a state-of-the-art global meteorological model to reconstruct the hourly history of weather throughout the world on a 50-kilometer grid. Definitions of the growing season vary throughout the world, but for the purposes of this report, we define it as the longest continuous period of non-freezing temperatures ( 32F) in the year (the calendar year in the Northern Hemisphere, or from July 1 until June 30 in the Southern Hemisphere). For each station, the records are corrected for the elevation difference between that station and Montevallo according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations. MERRA-2 Modern-Era Retrospective Analysis. Terms of Service | Privacy Policy | Cookies. The background color fills indicate the azimuth (the compass bearing) of the sun. Names, locations, and time zones of places and some airports come from the GeoNames Geographical Database . A mix of clouds and sun. 7 Day & Night Weather Forecast for Montevallo, AL -, QPF - Max Wind Speed - Max Humidity - Snowfall - Ice Accumulation, with QPF, Max Wind, Humidity, Snowfall, & Ice Accumulation Forecasts. The clearest month of the year in Montevallo is October, during which on average the sky is clear, mostly clear, or partly cloudy 66% of the time. Those scores are combined into a single hourly composite score, which is then aggregated into days, averaged over all the years in the analysis period, and smoothed. From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. While having the tremendous advantages of temporal and spatial completeness, these reconstructions: (1) are based on computer models that may have model-based errors, (2) are coarsely sampled on a 50 km grid and are therefore unable to reconstruct the local variations of many microclimates, and (3) have particular difficulty with the weather in some coastal areas, especially small islands. The darkest month of the year in Montevallo is December, with an average of 2.7 kWh. Tepehan, Turkey (6,412 miles away) and Baiyun, China (8,023 miles) are the far-away foreign places with temperatures most similar to Montevallo (view comparison). Partly cloudy. Never base any life decisions on weather information from this site or anywhere over the Internet. The month with the fewest wet days in Montevallo is October, with an average of 6.4 days with at least 0.04 inches of precipitation. Based on this score, the best times of year to visit Montevallo for general outdoor tourist activities are from late April to early June and from early September to mid October, with a peak score in the last week of September. Our tourism temperature score is 0 for perceived temperatures below 50F, rising linearly to 9 for 65F, to 10 for 75F, falling linearly to 9 for 80F, and to 1 for 90F or hotter. In Montevallo, the summers are long, hot, and muggy; the winters are short and cold; and it is wet and partly cloudy year round. The month with the most muggy days in Montevallo is July, with 28.3 days that are muggy or worse. The wind is most often from the south for 4.0 months, from February 26 to June 27 and for 2.0 days, from August 11 to August 13, with a peak percentage of 43% on May 4. Montevallo experiences some seasonal variation in monthly snowfall. Depending on the type of weather occurring and the area of the U.S., forecasters use a set of rainrates which are associated to the dBZ values. The time period when the sun is no more than 6 degrees below the horizon at either sunrise or sunset. Shortwave radiation includes visible light and ultraviolet radiation. Land Use data comes from the Global Land Cover SHARE database , published by the Food and Agriculture Organization of the United Nations. The percentage of days in which various types of precipitation are observed, excluding trace quantities: rain alone, snow alone, and mixed (both rain and snow fell in the same day). Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 46% on July 9. The snowy period of the year lasts for 6.5 days, from January 16 to January 23, with a sliding 31-day snowfall of at least 1.0 inches. The thin dotted line is the corresponding average rainfall. WeatherSpark.com. Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions, excluding hours in which the mean wind speed is less than. All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Algorithms 2nd Edition , by Jean Meeus. The clearer part of the year in Montevallo begins around July 22 and lasts for 4.1 months, ending around November 24. The stations contributing to this reconstruction are: To get a sense of how much these sources agree with each other, you can view a comparison of Montevallo and the stations that contribute to our estimates of its temperature history and climate. The wind is most often from the north for 4.1 months, from October 24 to February 26, with a peak percentage of 33% on January 1. The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds. The horizontal axis is the day of the year and the vertical axis is the hour of the day. The windiest month of the year in Montevallo is March, with an average hourly wind speed of 5.0 miles per hour. Based on growing degree days alone, the first spring blooms in Montevallo should appear around January 31, only rarely appearing before January 17 or after February 19. Copyright TWC Product and Technology LLC 2014, 2022. High near 95F. Unlike temperature, which typically varies significantly between night and day, dew point tends to change more slowly, so while the temperature may drop at night, a muggy day is typically followed by a muggy night. If you enjoy our coverage, please disable your ad blocker. The month with the most snow in Montevallo is January, with an average snowfall of 1.0 inches. One still should be able to carry on ordinary outdoor activities. The average snowfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. Potential for severe thunderstorms. For example: The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands. For each hour between 8:00 AM and 9:00 PM of each day in the analysis period (1980 to 2016), independent scores are computed for perceived temperature, cloud cover, and total precipitation. The average growing degree days accumulated over the course of the year, with 25th to 75th and 10th to 90th percentile bands. The shaded overlays indicate night and civil twilight. 1 Hour Rainfall Total Doppler Radar for Montevallo AL, providing current static map of storm severity from precipitation levels. The time in which the moon is above the horizon (light blue area), with new moons (dark gray lines) and full moons (blue lines) indicated. The average hourly wind speed in Montevallo experiences mild seasonal variation over the course of the year. The black line is the percentage chance that a given day is within the growing season. These values are estimates of the rainfall per hour, updated each volume scan, with rainfall accumulated over time. The month with the least rain in Montevallo is October, with an average rainfall of 2.9 inches. We will review the data in question. One scale (far left) represents dBZ values when the radar is in clear air mode (dBZ values from -28 to +28). View other Montevallo AL radar models including Long Range, Base, Composite, Storm Motion, Base Velocity, and Storm Total; with the option of viewing animated radar loops in dBZ and Vcp measurements, for surrounding areas of Montevallo and overall Shelby county, Alabama. Rain falls throughout the year in Montevallo. So, a more convenient number for calculations and comparison, a decibel (or logarithmic) scale (dBZ), is used.
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Elevation data comes from the Shuttle Radar Topography Mission (SRTM) , published by NASA's Jet Propulsion Laboratory. In this report, we use a base of 50F and a cap of 86F. Please select the information that is incorrect. The hottest month of the year in Montevallo is July, with an average high of 90F and low of 72F. The area within 2 miles of Montevallo is covered by trees (54%), cropland (33%), and artificial surfaces (11%), within 10 miles by trees (73%) and artificial surfaces (12%), and within 50 miles by trees (75%) and cropland (11%). A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. Over the course of the year, the temperature typically varies from 37F to 90F and is rarely below 23F or above 96F. The shaded overlays indicate night and civil twilight. All Rights Reserved. The horizon is well defined and the outline of objects might be visible without artificial light. The drier season lasts 5.6 months, from August 28 to February 16. Based on the tourism score, the best times of year to visit Montevallo for warm-weather activities are from late April to early June and from early September to mid October. "Reflectivity" is the amount of transmitted power returned to the radar receiver. Since hail can cause the rainfall estimates to be higher than what is actually occurring, steps are taken to prevent these high dBZ values from being converted to rainfall. You're permitted to use this graph as long as you provide prominent attribution with a link back close to the use of the graph. Winds SW at 5 to 10 mph. The cool season lasts for 2.9 months, from November 29 to February 24, with an average daily high temperature below 62F. High 93F. Within 10 miles contains only modest variations in elevation (643 feet). The beach/pool score favors clear, rainless days with perceived temperatures between 75F and 90F. The colors are the different echo intensities (reflectivity) measured in dBZ (decibels of Z) during each elevation scan. Winds light and variable. The earliest sunset is at 4:40 PM on December 4, and the latest sunset is 3 hours, 20 minutes later at 8:00 PM on June 29. In Montevallo, the average percentage of the sky covered by clouds experiences significant seasonal variation over the course of the year. The topography within 2 miles of Montevallo contains only modest variations in elevation, with a maximum elevation change of 246 feet and an average elevation above sea level of 452 feet. This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. The month with the most wet days in Montevallo is July, with an average of 13.5 days with at least 0.04 inches of precipitation. In 2022, the shortest day is December 21, with 9 hours, 58 minutes of daylight; the longest day is June 21, with 14 hours, 21 minutes of daylight. no moonlight, or other lights). 
The darker period of the year lasts for 2.6 months, from November 14 to February 3, with an average daily incident shortwave energy per square meter below 3.4 kWh. Chance of rain 60%. Weather data is prone to errors, outages, and other defects. This section discusses the total daily incident shortwave solar energy reaching the surface of the ground over a wide area, taking full account of seasonal variations in the length of the day, the elevation of the Sun above the horizon, and absorption by clouds and other atmospheric constituents. The month with the most days of rain alone in Montevallo is July, with an average of 13.5 days. The month with the most rain in Montevallo is February, with an average rainfall of 5.2 inches. We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. For a given day and hour of that day, the background color indicates the azimuth of the sun at that moment. Montevallo experiences significant seasonal variation in monthly rainfall. The brighter period of the year lasts for 4.6 months, from April 9 to August 28, with an average daily incident shortwave energy per square meter above 5.9 kWh. The estimated value at Montevallo is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Montevallo and a given station. The other scale (near left) represents dBZ values when the radar is in precipitation mode (dBZ values from 5 to 75). The wind is most often from the east for 2.4 months, from August 13 to October 24, with a peak percentage of 39% on September 15. Daylight saving time (DST) is observed in Montevallo during 2022, starting in the spring on March 13, lasting 7.8 months, and ending in the fall on November 6. The percentage of time spent at various humidity comfort levels, categorized by dew point. 
The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands. The vertical gray bars (new Moons) and blue bars (full Moons) indicate key Moon phases. Based on this score, the best time of year to visit Montevallo for hot-weather activities is from early June to mid September, with a peak score in the last week of August. The lightly tinted areas at the boundaries of the cardinal compass points indicate the implied intermediate directions (northeast, southeast, southwest, and northwest). 2008-2022 LocalConditions.com. From bottom (most yellow) to top (most gray), the color bands indicate: full daylight, twilight (civil, nautical, and astronomical), and full night. All other weather data, including cloud cover, precipitation, wind speed and direction, and solar flux, come from NASA's MERRA-2 Modern-Era Retrospective Analysis . The number of hours during which the Sun is visible (black line). The cloudiest month of the year in Montevallo is January, during which on average the sky is overcast or mostly cloudy 53% of the time. Hail is a good reflector of energy and will return very high dBZ values. The windier part of the year lasts for 7.2 months, from October 6 to May 13, with average wind speeds of more than 4.1 miles per hour. The transitions to and from daylight saving time are indicated by the 'DST' labels. This is the weather that will show up when you use the My Weather Link, NWS WEATHER ALERT FOR THE MONTEVALLO, AL AREA - Issued: 1142 AM CDT Wed Jul 20 2022. The average daily incident shortwave solar energy experiences significant seasonal variation over the course of the year. The tourism score favors clear, rainless days with perceived temperatures between 65F and 80F. The horizontal axis is the day of the year, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day. The thin dotted lines are the corresponding average perceived temperatures. You are about to report this weather station for bad data. The value of the dBZ depends upon the mode the radar is in at the time the image was created. A stray shower or thunderstorm is possible. The dBZ values increase as the strength of the signal returned to the radar increases. The figure below presents a compact representation of key lunar data for 2022. Today's temperature is forecast to be NEARLY THE SAME as yesterday. This report illustrates the typical weather in Montevallo, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016. The time period when the sun is between 12 and 18 degrees below the horizon at either sunrise or sunset. The snowless period of the year lasts for 12 months, from January 23 to January 16. Montevallo weather by month. The calmer time of year lasts for 4.8 months, from May 13 to October 6. The coldest month of the year in Montevallo is January, with an average low of 37F and high of 56F. For print usage, please acquire a license. The solar day over the course of the year 2022. Ordinary outdoor activities are not possible at this time without extra illumination. Growing degree days are a measure of yearly heat accumulation used to predict plant and animal development, and defined as the integral of warmth above a base temperature, discarding any excess above a maximum temperature. Within 50 miles contains significant variations in elevation (1,827 feet). The higher the dBZ, the stronger the rainrate. There are 3 weather stations near enough to contribute to our estimation of the temperature and dew point in Montevallo. Click on each chart for more information. The sun does not contribute to the illumination of the sky before this time in the morning, or after this time in the evening. NOTE: We are diligently working to improve the view of local radar for Montevallo - in the meantime, we can only show the US as a whole in static form. The least snow falls around August 2, with an average total accumulation of 0.0 inches. To characterize how pleasant the weather is in Montevallo throughout the year, we compute two travel scores. Lower dew points feel drier and higher dew points feel more humid. access_time 1:26 PM CDT on July 20, 2022 (GMT -5) | Updated 15 seconds ago. The time period when the sun is between 6 and 12 degrees below the horizon at either sunrise or sunset. The figure below shows you a compact characterization of the entire year of hourly average temperatures. The scale of dBZ values is also related to the intensity of rainfall. We further caution that our travel scores are only as good as the data that underpin them, that weather conditions at any given location and time are unpredictable and variable, and that the definition of the scores reflects a particular set of preferences that may not agree with those of any particular reader. The predominant average hourly wind direction in Montevallo varies throughout the year. The month with the fewest muggy days in Montevallo is February, with 0.2 days that are muggy or worse. Please review our full terms contained on our Terms of Service page. The average hourly temperature, color coded into bands. The time of Actual Sunset minus the time of Actual Sunrise. Our precipitation score, which is based on the three-hour precipitation centered on the hour in question, is 10 for no precipitation, falling linearly to 9 for trace precipitation, and to 0 for 0.04 inches of precipitation or more.
The earliest sunrise is at 5:38 AM on June 12, and the latest sunrise is 1 hour, 31 minutes later at 7:09 AM on November 5. The chance of wet days in Montevallo varies throughout the year. Our beach/pool temperature score is 0 for perceived temperatures below 65F, rising linearly to 9 for 75F, to 10 for 82F, falling linearly to 9 for 90F, and to 1 for 100F or hotter. The black lines are lines of constant solar elevation (the angle of the sun above the horizon, in degrees). The horizon should be clearly defined and the brightest stars should be visible under good atmospheric conditions (i.e. In the beginning of morning astronomical twilight and at the end of astronomical twilight in the evening, sky illumination is very faint, and might be undetectable. Time zones for airports and weather stations are provided by AskGeo.com . The wetter season lasts 6.4 months, from February 16 to August 28, with a greater than 32% chance of a given day being a wet day. Each reflectivity image you see includes one of two color scales. Reflectivity (designated by the letter Z) covers a wide range of signals (from very weak to very strong). As with rainfall, we consider the snowfall accumulated over a sliding 31-day period centered around each day of the year. The calmest month of the year in Montevallo is July, with an average hourly wind speed of 3.1 miles per hour.
