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Climate and Average Weather Year Round in Huntsville Tennessee, United States

In Huntsville, the summers are long, warm, and muggy; the winters are short and very cold; and it is wet and partly cloudy year round. Over the course of the year, the temperature typically varies from 29°F to 85°F and is rarely below 13°F or above 91°F.

Based on the tourism score, the best times of year to visit Huntsville for warm-weather activities are from early June to early July and from late July to late September.

Climate in Huntsville

coldcoolwarmcoolcoldJanFebMarAprMayJunJulAugSepOctNovDecNowNow67%67%41%41%clearovercastprecipitation: 4.4 inprecipitation: 4.4 in2.6 in2.6 inmuggy: 78%muggy: 78%0%0%drydrytourism score: 6.5tourism score: 6.50.40.4
Huntsville weather by month. Click on each chart for more information.

Average Temperature in Huntsville

The warm season lasts for 3.9 months, from May 24 to September 21, with an average daily high temperature above 77°F. The hottest day of the year is July 21, with an average high of 85°F and low of 67°F.

The cold season lasts for 2.9 months, from November 30 to February 26, with an average daily high temperature below 53°F. The coldest day of the year is January 29, with an average low of 29°F and high of 45°F.

Average High and Low Temperature in Huntsville

Average High and Low Temperature in HuntsvillewarmcoldcoldJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F10°F10°F20°F20°F30°F30°F40°F40°F50°F50°F60°F60°F70°F70°F80°F80°F90°F90°F100°F100°FJan 2945°FJan 2945°FJul 2185°FJul 2185°F29°F29°F67°F67°FMay 2477°FMay 2477°FSep 2177°FSep 2177°FNov 3053°FNov 3053°F57°F57°F57°F57°F36°F36°F34°F34°FNowNow
The daily average high (red line) and low (blue line) temperature, with 25th to 75th and 10th to 90th percentile bands. The thin dotted lines are the corresponding average perceived temperatures.

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 Huntsville

Average Hourly Temperature in HuntsvilleJanFebMarAprMayJunJulAugSepOctNovDec12 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMNowNowvery coldvery coldcoldcoldcoolcoolcomfortablewarmfreezing
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The average hourly temperature, color coded into bands. The shaded overlays indicate night and civil twilight.

Sant'Andrea, Italy (4,758 miles away) is the far-away foreign place with temperatures most similar to Huntsville (view comparison).

Compare Huntsville to another city:

Clouds

In Huntsville, the average percentage of the sky covered by clouds experiences significant seasonal variation over the course of the year.

The clearer part of the year in Huntsville begins around June 16 and lasts for 5.0 months, ending around November 15. On September 21, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 67% of the time, and overcast or mostly cloudy 34% of the time.

The cloudier part of the year begins around November 15 and lasts for 7.0 months, ending around June 16. On January 3, the cloudiest day of the year, the sky is overcast or mostly cloudy 59% of the time, and clear, mostly clear, or partly cloudy 41% of the time.

Cloud Cover Categories in Huntsville

Cloud Cover Categories in HuntsvilleclearercloudiercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Sep 2167%Sep 2167%Jan 341%Jan 341%Jun 1654%Jun 1654%Nov 1554%Nov 1554%NowNowclearmostly clearpartly cloudymostly cloudyovercast
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds.

Precipitation

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Huntsville varies throughout the year.

The wetter season lasts 5.0 months, from March 19 to August 21, with a greater than 34% chance of a given day being a wet day. The chance of a wet day peaks at 45% on July 8.

The drier season lasts 7.0 months, from August 21 to March 19. The smallest chance of a wet day is 22% on October 19.

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 45% on July 8.

Daily Chance of Precipitation in Huntsville

Daily Chance of Precipitation in HuntsvillewetdrydryJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Jul 845%Jul 845%Oct 1922%Oct 1922%Jan 129%Jan 129%Mar 1934%Mar 1934%Aug 2134%Aug 2134%NowNowrainsnow
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).

Rainfall

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. Huntsville experiences some seasonal variation in monthly rainfall.

Rain falls throughout the year in Huntsville. The most rain falls during the 31 days centered around December 2, with an average total accumulation of 4.3 inches.

The least rain falls around October 20, with an average total accumulation of 2.6 inches.

Average Monthly Rainfall in Huntsville

The average rainfall (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. The thin dotted line is the corresponding average liquid-equivalent snowfall.

Snowfall

We report snowfall in liquid-equivalent terms. The actual depth of new snowfall is typically between 5 and 10 times the liquid-equivalent amount, assuming the ground is frozen. Colder, drier snow tends to be on the higher end of that range and warmer, wetter snow on the lower end.

As with rainfall, we consider the snowfall accumulated over a sliding 31-day period centered around each day of the year. Huntsville experiences some seasonal variation in monthly liquid-equivalent snowfall.

The snowy period of the year lasts for 2.9 months, from December 11 to March 9, with a sliding 31-day liquid-equivalent snowfall of at least 0.1 inches. The most snow falls during the 31 days centered around January 30, with an average total liquid-equivalent accumulation of 0.3 inches.

The snowless period of the year lasts for 9.1 months, from March 9 to December 11. The least snow falls around July 29, with an average total liquid-equivalent accumulation of 0.0 inches.

Average Liquid-Equivalent Monthly Snowfall in Huntsville

Average Liquid-Equivalent Monthly Snowfall in HuntsvillesnowJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in1 in1 in2 in2 in3 in3 in4 in4 inJan 300.3 inJan 300.3 inJul 290.0 inJul 290.0 inDec 110.1 inDec 110.1 inMar 90.1 inMar 90.1 inNowNow
The average liquid-equivalent 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. The thin dotted line is the corresponding average rainfall.

Sun

The length of the day in Huntsville varies significantly over the course of the year. In 2021, the shortest day is December 21, with 9 hours, 41 minutes of daylight; the longest day is June 20, with 14 hours, 39 minutes of daylight.

Hours of Daylight and Twilight in Huntsville

Hours of Daylight and Twilight in HuntsvilleJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 7 minMar 2012 hr, 7 minMar 2014 hr, 39 minJun 2014 hr, 39 minJun 2012 hr, 8 minSep 2212 hr, 8 minSep 229 hr, 41 minDec 219 hr, 41 minDec 21nightnightdayNowNow
The number of hours during which the Sun is visible (black line). From bottom (most yellow) to top (most gray), the color bands indicate: full daylight, twilight (civil, nautical, and astronomical), and full night.

The earliest sunrise is at 6:19 AM on June 13, and the latest sunrise is 1 hour, 47 minutes later at 8:06 AM on November 6. The earliest sunset is at 5:22 PM on December 5, and the latest sunset is 3 hours, 38 minutes later at 8:59 PM on June 28.

Daylight saving time (DST) is observed in Huntsville during 2021, starting in the spring on March 14, lasting 7.8 months, and ending in the fall on November 7.

Sunrise & Sunset with Twilight and Daylight Saving Time in Huntsville

Sunrise & Sunset with Twilight and Daylight Saving Time in HuntsvilleJanFebMarAprMayJunJulAugSepOctNovDec2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJun 136:19 AMJun 136:19 AM8:59 PMJun 288:59 PMJun 28Dec 55:22 PMDec 55:22 PM8:06 AMNov 68:06 AMNov 6Mar 14DSTMar 14DSTDSTNov 7DSTNov 7daynightnightnightSolarMidnightSolarMidnightSolarNoonSunriseSunsetNowNow
The solar day over the course of the year 2021. From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. The day, twilights (civil, nautical, and astronomical), and night are indicated by the color bands from yellow to gray. The transitions to and from daylight saving time are indicated by the 'DST' labels.

Moon

The figure below presents a compact representation of key lunar data for 2021. 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.

Moon Rise, Set & Phases in Huntsville

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 shaded overlays indicate night and civil twilight.

Humidity

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.

Huntsville experiences extreme seasonal variation in the perceived humidity.

The muggier period of the year lasts for 3.9 months, from May 25 to September 22, during which time the comfort level is muggy, oppressive, or miserable at least 19% of the time. The muggiest day of the year is July 25, with muggy conditions 78% of the time.

The least muggy day of the year is December 14, when muggy conditions are essentially unheard of.

Humidity Comfort Levels in Huntsville

Humidity Comfort Levels in HuntsvillemuggyJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Dec 140%Dec 140%78%Jul 2578%Jul 25May 2519%May 2519%Sep 2219%Sep 2219%NowNowoppressiveoppressivemuggymuggyhumidhumiddrydrycomfortablecomfortable
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The percentage of time spent at various humidity comfort levels, categorized by dew point.

Wind

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 experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 6.1 months, from November 4 to May 8, with average wind speeds of more than 4.3 miles per hour. The windiest day of the year is February 25, with an average hourly wind speed of 5.6 miles per hour.

The calmer time of year lasts for 5.9 months, from May 8 to November 4. The calmest day of the year is August 1, with an average hourly wind speed of 3.0 miles per hour.

Average Wind Speed in Huntsville

Average Wind Speed in HuntsvillewindywindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph0 mph1 mph1 mph2 mph2 mph3 mph3 mph4 mph4 mph5 mph5 mph6 mph6 mph7 mph7 mph8 mph8 mph9 mph9 mphFeb 255.6 mphFeb 255.6 mphAug 13.0 mphAug 13.0 mphNov 44.3 mphNov 44.3 mphMay 84.3 mphMay 84.3 mphNowNow
The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.

The predominant average hourly wind direction in Huntsville varies throughout the year.

The wind is most often from the west for 3.7 weeks, from January 10 to February 5; for 6.0 days, from February 14 to February 20; and for 2.1 months, from June 13 to August 16, with a peak percentage of 41% on July 13. The wind is most often from the south for 1.3 weeks, from February 5 to February 14; for 3.8 months, from February 20 to June 13; and for 4.8 months, from August 16 to January 10, with a peak percentage of 37% on May 4.

Wind Direction in Huntsville

Wind Direction in HuntsvilleWSWSJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%NowNowwestsouthnortheast
northeastsouthwest
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 1.0 mph. The lightly tinted areas at the boundaries are the percentage of hours spent in the implied intermediate directions (northeast, southeast, southwest, and northwest).

Best Time of Year to Visit

To characterize how pleasant the weather is in Huntsville throughout the year, we compute two travel scores.

The tourism score favors clear, rainless days with perceived temperatures between 65°F and 80°F. Based on this score, the best times of year to visit Huntsville for general outdoor tourist activities are from early June to early July and from late July to late September, with a peak score in the last week of August.

Tourism Score in Huntsville

Tourism Score in Huntsvillebest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810106.56.50.40.46.06.05.85.8NowNowprecipitationprecipitationcloudscloudstemperaturetemperature tourism score
The tourism score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

The beach/pool score favors clear, rainless days with perceived temperatures between 75°F and 90°F. Based on this score, the best time of year to visit Huntsville for hot-weather activities is from late June to early September, with a peak score in the last week of July.

Beach/Pool Score in Huntsville

Beach/Pool Score in Huntsvillebest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810105.75.70.00.0NowNowprecipitationprecipitationcloudscloudstemperaturetemperature beach/pool score
The beach/pool score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

Methodology

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. 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.

Our cloud cover score is 10 for fully clear skies, falling linearly to 9 for mostly clear skies, and to 1 for fully overcast skies.

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.

Our tourism temperature score is 0 for perceived temperatures below 50°F, rising linearly to 9 for 65°F, to 10 for 75°F, falling linearly to 9 for 80°F, and to 1 for 90°F or hotter.

Our beach/pool temperature score is 0 for perceived temperatures below 65°F, rising linearly to 9 for 75°F, to 10 for 82°F, falling linearly to 9 for 90°F, and to 1 for 100°F or hotter.

Growing Season

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 6.5 months (199 days), from around April 11 to around October 27, rarely starting before March 24 or after April 30, and rarely ending before October 8 or after November 14.

Time Spent in Various Temperature Bands and the Growing Season in Huntsville

Time Spent in Various Temperature Bands and the Growing Season in Huntsvillegrowing seasonJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%50%Apr 1150%Apr 1150%Oct 2750%Oct 2790%Apr 3090%Apr 3090%Oct 890%Oct 810%Mar 2410%Mar 2410%Nov 1410%Nov 140%Dec 170%Dec 17Jul 22100%Jul 22100%freezingvery coldcoldcoolcomfortablewarmhotfrigid
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The percentage of time spent in various temperature bands. The black line is the percentage chance that a given day is within the growing 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.

Based on growing degree days alone, the first spring blooms in Huntsville should appear around March 9, only rarely appearing before February 23 or after March 25.

Growing Degree Days in Huntsville

Growing Degree Days in HuntsvilleJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F500°F500°F1,000°F1,000°F1,500°F1,500°F2,000°F2,000°F2,500°F2,500°F3,000°F3,000°F3,500°F3,500°F4,000°F4,000°FMar 988°FMar 988°FMay 30900°FMay 30900°FJul 101,800°FJul 101,800°FDec 313,978°FDec 313,978°FNowNow
The average growing degree days accumulated over the course of the year, with 25th to 75th and 10th to 90th percentile bands.

Solar Energy

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 19 to September 2, with an average daily incident shortwave energy per square meter above 5.7 kWh. The brightest day of the year is June 23, with an average of 6.6 kWh.

The darker period of the year lasts for 3.0 months, from November 10 to February 8, with an average daily incident shortwave energy per square meter below 3.1 kWh. The darkest day of the year is December 24, with an average of 2.2 kWh.

Average Daily Incident Shortwave Solar Energy in Huntsville

Average Daily Incident Shortwave Solar Energy in HuntsvillebrightdarkdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWh9 kWh9 kWhJun 236.6 kWhJun 236.6 kWhDec 242.2 kWhDec 242.2 kWhApr 195.7 kWhApr 195.7 kWhSep 25.7 kWhSep 25.7 kWhFeb 83.1 kWhFeb 83.1 kWhNowNow
The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands.

Topography

For the purposes of this report, the geographical coordinates of Huntsville are 36.410 deg latitude, -84.490 deg longitude, and 1,319 ft elevation.

The topography within 2 miles of Huntsville contains significant variations in elevation, with a maximum elevation change of 607 feet and an average elevation above sea level of 1,404 feet. Within 10 miles contains significant variations in elevation (1,982 feet). Within 50 miles also contains large variations in elevation (2,976 feet).

The area within 2 miles of Huntsville is covered by trees (95%), within 10 miles by trees (93%), and within 50 miles by trees (74%) and cropland (18%).

Data Sources

This report illustrates the typical weather in Huntsville, 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 5 weather stations near enough to contribute to our estimation of the temperature and dew point in Huntsville.

For each station, the records are corrected for the elevation difference between that station and Huntsville 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 Huntsville is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Huntsville and a given station.

The stations contributing to this reconstruction are: Oak Ridge (KOQT, 30%, 49 kilometers, southeast); Wayne County Airport (KEKQ, 23%, 59 kilometers, northwest); Middlesboro-Bell County Airport (K1A6, 18%, 71 kilometers, east); Crossville Memorial Airport (KCSV, 16%, 74 kilometers, southwest); and London-Corbin Airport (KLOZ, 14%, 84 kilometers, northeast).

Other Data

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.

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 airports 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.

Disclaimer

The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Weather data is prone to errors, outages, and other defects. We assume no responsibility for any decisions made on the basis of the content presented on this site.

We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. 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.

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.