Spring Weather in Huntsville United States

Daily high temperatures increase by 23°F, from 59°F to 83°F, rarely falling below 45°F or exceeding 90°F.

Daily low temperatures increase by 23°F, from 40°F to 63°F, rarely falling below 27°F or exceeding 70°F.

For reference, on July 21, the hottest day of the year, temperatures in Huntsville typically range from 70°F to 89°F, while on January 23, the coldest day of the year, they range from 33°F to 50°F.

The figure below shows you a compact characterization of the hourly average spring temperatures. The horizontal axis is the day, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.

Podgorica, Montenegro (5,351 miles away) and Luoqiao, China (7,897 miles) are the far-away foreign places with temperatures most similar to Huntsville (view comparison).

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The spring in Huntsville experiences gradually decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 52% to 44%.

The clearest day of the spring is April 29, with clear, mostly clear, or partly cloudy conditions 58% of the time.

For reference, on January 5, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 56%, while on September 20, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 67%.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Huntsville, the chance of a wet day over the course of the spring is rapidly increasing, starting the season at 31% and ending it at 38%.

For reference, the year's highest daily chance of a wet day is 41% on June 28, and its lowest chance is 22% on October 14.

Rainfall

To show variation within the season and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day.

The average sliding 31-day rainfall during the spring in Huntsville is rapidly decreasing, starting the season at 4.6 inches, when it rarely exceeds 7.8 inches or falls below 2.1 inches, and ending the season at 3.5 inches, when it rarely exceeds 5.8 inches or falls below 1.5 inches.

The highest average 31-day accumulation is 4.7 inches on March 9.

Over the course of the spring in Huntsville, the length of the day is very rapidly increasing. From the start to the end of the season, the length of the day increases by 2 hours, 52 minutes, implying an average daily increase of 1 minute, 53 seconds, and weekly increase of 13 minutes, 13 seconds.

The shortest day of the spring is March 1, with 11 hours, 28 minutes of daylight and the longest day is May 31, with 14 hours, 20 minutes of daylight.

The latest sunrise of the spring in Huntsville is 7:02 AM on March 10 and the earliest sunrise is 1 hour, 29 minutes earlier at 5:34 AM on May 31.

The earliest sunset is 5:42 PM on March 1 and the latest sunset is 2 hours, 11 minutes later at 7:54 PM on May 31.

Daylight saving time (DST) ends at 3:00 AM on March 10, 2024, shifting sunrise and sunset to be an hour earlier.

For reference, on June 20, the longest day of the year, the Sun rises at 5:33 AM and sets 14 hours, 29 minutes later, at 8:02 PM, while on December 21, the shortest day of the year, it rises at 6:50 AM and sets 9 hours, 50 minutes later, at 4:39 PM.

The figure below presents a compact representation of the sun's elevation (the angle of the sun above the horizon) and azimuth (its compass bearing) for every hour of every day in the reporting period. The horizontal axis is the day of the year and the vertical axis is the hour of the day. For a given day and hour of that day, the background color indicates the azimuth of the sun at that moment. The black isolines are contours of constant solar elevation.

The figure below presents a compact representation of key lunar data for the spring of 2024. The horizontal axis is the day, the vertical axis is the hour of the day, and the colored areas indicate when the moon is above the horizon. The vertical gray bars (new Moons) and blue bars (full Moons) indicate key Moon phases. The label associated with each bar indicates the date and time that the phase is obtained, and the companion time labels indicate the rise and set times of the Moon for the nearest time interval in which the moon is above the horizon.

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.

The chance that a given day will be muggy in Huntsville is very rapidly increasing during the spring, rising from 0% to 39% over the course of the season.

For reference, on July 21, the muggiest day of the year, there are muggy conditions 85% of the time, while on January 14, the least muggy day of the year, there are muggy conditions 0% of the time.

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 Huntsville is rapidly decreasing during the spring, decreasing from 7.2 miles per hour to 4.9 miles per hour over the course of the season.

For reference, on February 25, the windiest day of the year, the daily average wind speed is 7.2 miles per hour, while on July 27, the calmest day of the year, the daily average wind speed is 4.0 miles per hour.

The wind direction in Huntsville during the spring is predominantly out of the south from March 1 to March 3 and from March 8 to May 31 and the north from March 3 to March 8.

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 (≥ 32°F) in the year (the calendar year in the Northern Hemisphere, or from July 1 until June 30 in the Southern Hemisphere).

The growing season in Huntsville typically lasts for 7.3 months (224 days), from around March 25 to around November 4, rarely starting before March 4 or after April 14, and rarely ending before October 18 or after November 25.

During the spring in Huntsville, the chance that a given day is within the growing season is very rapidly increasing rising from 7% to 100% over the course of the season.

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. In this report, we use a base of 50°F and a cap of 86°F.

The average accumulated growing degree days in Huntsville are very rapidly increasing during the spring, increasing by 1,100°F, from 124°F to 1,225°F, over the course of the season.

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 in Huntsville is very rapidly increasing during the spring, rising by 2.5 kWh, from 4.1 kWh to 6.6 kWh, over the course of the season.

For the purposes of this report, the geographical coordinates of Huntsville are 34.730 deg latitude, -86.586 deg longitude, and 630 ft elevation.

The topography within 2 miles of Huntsville contains only modest variations in elevation, with a maximum elevation change of 384 feet and an average elevation above sea level of 655 feet. Within 10 miles contains only modest variations in elevation (1,086 feet). Within 50 miles also contains very significant variations in elevation (1,532 feet).

The area within 2 miles of Huntsville is covered by artificial surfaces (95%), within 10 miles by cropland (43%) and artificial surfaces (30%), and within 50 miles by cropland (53%) and trees (40%).