Average Weather in Valley Alabama, United States
In Valley, the summers are long, hot, and muggy; the winters are short, cold, and wet; and it is partly cloudy year round. Over the course of the year, the temperature typically varies from 37°F to 90°F and is rarely below 23°F or above 96°F.
The hot season lasts for 3.9 months, from May 24 to September 20, with an average daily high temperature above 83°F. The hottest day of the year is July 22, with an average high of 90°F and low of 71°F.
The cool season lasts for 2.9 months, from November 28 to February 24, with an average daily high temperature below 63°F. The coldest day of the year is January 24, with an average low of 37°F and high of 56°F.
Average High and Low Temperature
The figure below shows you a compact characterization of the entire year of hourly average temperatures. 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.
Average Hourly Temperature
In Valley, the average percentage of the sky covered by clouds experiences mild seasonal variation over the course of the year.
The clearer part of the year in Valley begins around August 1 and lasts for 3.9 months, ending around November 27. On October 8, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 67% of the time, and overcast or mostly cloudy 33% of the time.
The cloudier part of the year begins around November 27 and lasts for 8.2 months, ending around August 1. On January 3, the cloudiest day of the year, the sky is overcast or mostly cloudy 53% of the time, and clear, mostly clear, or partly cloudy 47% of the time.
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Valley varies throughout the year.
The wetter season lasts 3.0 months, from May 28 to August 27, with a greater than 34% chance of a given day being a wet day. The chance of a wet day peaks at 48% on July 9.
The drier season lasts 9.0 months, from August 27 to May 28. The smallest chance of a wet day is 18% on October 16.
Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 48% on July 9.
Daily Chance of Precipitation
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. Valley experiences significant seasonal variation in monthly rainfall.
Rain falls throughout the year in Valley. The most rain falls during the 31 days centered around February 28, with an average total accumulation of 4.9 inches.
The least rain falls around October 18, with an average total accumulation of 2.5 inches.
Average Monthly Rainfall
The length of the day in Valley varies significantly over the course of the year. In 2017, the shortest day is December 21, with 9 hours, 59 minutes of daylight; the longest day is June 21, with 14 hours, 19 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 5:32 AM on June 11, and the latest sunrise is 1 hour, 29 minutes later at 7:01 AM on November 4. The earliest sunset is at 4:34 PM on December 4, and the latest sunset is 3 hours, 19 minutes later at 7:52 PM on June 29.
Daylight saving time (DST) is observed in Valley during 2017, starting in the spring on March 12, lasting 7.8 months, and ending in the fall on November 5.
Sunrise & Sunset with Twilight and Daylight Saving Time
We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid. 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.
Valley experiences extreme seasonal variation in the perceived humidity.
The muggier period of the year lasts for 4.8 months, from May 13 to October 6, during which time the comfort level is muggy, oppressive, or miserable at least 24% of the time. The muggiest day of the year is July 24, with muggy conditions 93% of the time.
The least muggy day of the year is January 24, when muggy conditions are essentially unheard of.
Humidity Comfort Levels
This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. The wind experienced at any given location is highly dependent on local topography and other factors, and instantaneous wind speed and direction vary more widely than hourly averages.The average hourly wind speed in Valley does not vary significantly over the course of the year, remaining within 0.5 miles per hour of 2.2 miles per hour throughout.
Average Wind Speed
The predominant average hourly wind direction in Valley varies throughout the year.
The wind is most often from the west for 2.4 weeks, from January 7 to January 24; for 2.3 weeks, from February 25 to March 13; and for 2.8 months, from May 19 to August 12, with a peak percentage of 44% on July 14. The wind is most often from the north for 1.0 months, from January 24 to February 25 and for 1.7 months, from November 15 to January 7, with a peak percentage of 30% on January 29. The wind is most often from the east for 3.1 months, from August 12 to November 15, with a peak percentage of 48% on September 8.
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. Shortwave radiation includes visible light and ultraviolet radiation.
The average daily incident shortwave solar energy experiences significant seasonal variation over the course of the year.
The brighter period of the year lasts for 4.4 months, from April 9 to August 20, with an average daily incident shortwave energy per square meter above 5.9 kWh. The brightest day of the year is May 20, with an average of 6.8 kWh.
The darker period of the year lasts for 2.6 months, from November 14 to February 4, with an average daily incident shortwave energy per square meter below 3.5 kWh. The darkest day of the year is December 23, with an average of 2.7 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of Valley are 32.819 deg latitude, -85.179 deg longitude, and 617 ft elevation.
The topography within 2 miles of Valley contains only modest variations in elevation, with a maximum elevation change of 190 feet and an average elevation above sea level of 615 feet. Within 10 miles also contains only modest variations in elevation (397 feet). Within 50 miles contains only modest variations in elevation (1,391 feet).
The area within 2 miles of Valley is covered by trees (75%) and artificial surfaces (20%), within 10 miles by trees (82%), and within 50 miles by trees (82%) and cropland (12%).
This report illustrates the typical weather in Valley, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.
Temperature and Dew Point
There are 3 weather stations near enough to contribute to our estimation of the temperature and dew point in Valley.
For each station, the records are corrected for the elevation difference between that station and Valley according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.
The estimated value at Valley is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Valley and a given station.
The stations contributing to this reconstruction are: La Grange, Callaway Airport (48%, 24 kilometers, northeast); Auburn-Opelika Robert G Pitts Airport (30%, 33 kilometers, southwest); and Columbus Airport (22%, 40 kilometers, southeast).
All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Tables of the Sun, Moon and Planets , by Jean Meeus.
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 . 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.
Land Use data comes from the Global Land Cover SHARE database , published by the Food and Agriculture Organization of the United Nations.
Elevation data comes from the Shuttle Radar Topography Mission (SRTM) , published by NASA's Jet Propulsion Laboratory.
Names, locations, and time zones of places and some airports come from the GeoNames Geographical Database .
Time zones for aiports and weather stations are provided by AskGeo.com .
Maps are © Esri, with data from National Geographic, Esri, DeLorme, NAVTEQ, UNEP-WCMC, USGS, NASA, ESA, METI, NRCAN, GEBCO, NOAA, and iPC.