Huntsville, Alabama Weather
Thunder quiets the land. Day 93 of summer. Read this microseason across nine climate regions →
Huntsville weather forecast — hour by hour, 7-day outlook, NOAA radar
Conditions updated 2:00 AM CDT · Open-Meteo
- TodaySep 21Heavy Drizzle later22%0.04″95°71°—
- TuesdaySep 22Overcast45%—91°70°-4°
- WednesdaySep 23Light Drizzle11%—85°68°-6°
- ThursdaySep 24Light Drizzle——79°65°-6°
- FridaySep 25Overcast——82°61°+3°
- SaturdaySep 26Overcast——80°63°-2°
- SundaySep 27Overcast——83°60°+3°
Air quality now AQI 56 · Moderate
AQI 56 (Moderate), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 11.3 µg/m³ (AQI 55) with a 0.97 fine-to-coarse ratio and 1 mph wind — combustion smoke trapped in stagnant air, not road dust.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
What's driving it
Ozone × UV × Sky
Ozone at AQI 37 now. With UV 3.3 peaking around 1 PM under partly cloudy skies, surface ozone likely climbs to AQI 12.
- Present
- AQI 37
- UV peak
- 3.3 at 1 PM
- Sky at peak
- partly cloudy
- Projected peak
- AQI 12
PM × Wind × Precip
PM2.5 at 11.3 µg/m³ (AQI 55) with a 0.97 fine-to-coarse ratio and 1 mph wind — combustion smoke trapped in stagnant air, not road dust.
- PM2.5/PM10
- 0.97
- Wind
- calm
- Recent rain
- 0h in last 6h
- Pattern
- stagnant smoke
Trends
Seven days of AQI and PM2.5.
Hourly air-quality data from the Copernicus Atmosphere Monitoring Service, charted across the past and next several days. Dashed lines mark the AQI breakpoints at 50 (Good → Moderate) and 100 (Moderate → Unhealthy for Sensitive Groups).
September dries up ditches or breaks down bridges.
- Moonrise
- 4:04 PM
- Moonset
- 1:23 AM
- In sign
- ♑︎ Capricorn
Thunder quiets the land
Read this microseason across nine climate regions →
All 72 microseasons on the year wheel →
Huntsville at a glance
- Today vs. normal: Today averages 83°F (high 95°F, low 71°F), 10°F above the 73°F normal for Sep 21
- Last frost: March 24 (1991–2020 median, NOAA station 15 km away)
- Microseason: Sep 21–25
- Planting calendar: September — harvest tomatoes, peppers, beans, summer squash, winter squash
15-Day Forecast — Huntsville
- Mon95°71°22%
- Tue91°70°45%
- Wed85°68°11%
- Thu79°65°6%
- Fri82°61°1%
- Sat80°63°2%
- Sun83°60°3%
- Mon83°60°4%
- Tue85°61°21%
- Wed88°66°24%
- Thu83°62°13%
- Fri85°57°10%
- Sat89°67°13%
- Sun87°71°16%
- Mon88°67°19%
Forecast data from Open-Meteo (CC BY 4.0).
Live wind & temperature near Huntsville
Interactive wind and temperature map centered on Huntsville — it loads in your browser. Open the full weather map.
Right now in the garden
Late season
As of September 21, the first frost (around November 8) is about 7 weeks away. Frost-tender plants keep producing until then. This city's planting calendar for September: harvest tomatoes, peppers, beans, summer squash, and winter squash.
SPC Convective Outlook
Storm Prediction Center — Huntsville
SPC has placed Huntsville in the Marginal Risk category for severe thunderstorms today.
- TODAYMRGLMarginal Risk
- TOMORROWTSTMGeneral Thunderstorms
- DAY 3TSTMGeneral Thunderstorms
Isolated severe storms possible. Limited threat for hail or damaging wind.
Source: NOAA / NWS Storm Prediction Center categorical convective outlook.
Sun & seasons in Huntsville
Huntsville sits in Madison County, where the year’s longest day runs 14h 29m of daylight and its shortest just 9h 49m — a swing of +4h 40m between the June and December solstices. Clocks spring forward on Sunday, March 8, 2026 and fall back on Sunday, November 1, 2026.
Birmingham, the state’s largest city, lies about 81 miles to the S. The nearest town Huntsville tracks is Graysville, roughly 74 miles to the SSW.
Air quality in Huntsville
Air quality in Huntsville’s county has trended cleaner since 2020; its cleanest year on record was 2025 (median AQI 42). See the full air-quality history for Huntsville.
Planting calendar
| Month | Plant | Harvest |
|---|---|---|
| March | lettuce, peas, spinach, radishes | radishes |
| April | lettuce, spinach, radishes, tomatoes, peppers, beans, squash | lettuce, spinach, radishes |
| May | tomatoes, peppers, beans, squash | lettuce, peas, spinach, radishes |
| June | beans, squash | tomatoes, peppers, beans, summer squash, garlic |
| July | tomatoes, peppers, beans, squash | tomatoes, peppers, beans, summer squash, winter squash |
| August | beans, squash, fall brassicas, carrots | tomatoes, peppers, beans, summer squash, winter squash |
| September | — | tomatoes, peppers, beans, summer squash, winter squash |
| October | garlic (overwinter) | tomatoes, peppers, beans, summer squash, winter squash, fall brassicas, carrots |
| November | — | tomatoes, peppers, beans, summer squash, winter squash, fall brassicas, carrots |
| December | — | fall brassicas, carrots |
A year in weather
July is Huntsville's warmest stretch (~81°F) and January its coldest (~43°F); precipitation crests in December at 5.9 inches and ebbs in September to 3.5 inches.
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 43° | 5.0″ | 7 |
| February | 47° | 5.1″ | 8 |
| March | 54° | 5.4″ | 8 |
| April | 63° | 4.9″ | 7 |
| May | 71° | 4.7″ | 7 |
| June | 79° | 4.1″ | 7 |
| July | 81° | 4.5″ | 7 |
| August | 81° | 3.5″ | 6 |
| September | 75° | 3.5″ | 4 |
| October | 64° | 3.6″ | 5 |
| November | 53° | 4.3″ | 6 |
| December | 46° | 5.9″ | 7 |
Regional context
Similar climates Redstone Arsenal, AL, Madison, AL, Triana, AL
In Huntsville, NOAA NCEI 1991-2020 normals put January near 43°F and July near 81°F — a 39°F seasonal arc — with about 54.3 inches of precipitation over 79 rainy or snowy days.
No season owns Huntsville's rain: December reaches 5.9 inches across 7.3 days and September keeps 3.5 inches on 4.4, an even spread through Huntsville's year. That lines Huntsville up with places like Redstone Arsenal, AL, Madison, AL and Triana, AL, fed by overlapping storm tracks.
Huntsville reaches its last hard frost near March 24; that is the cue for peas, lettuce, spinach, and radishes. Huntsville's heat-lovers — tomatoes, peppers, squash — hold off until Huntsville's frost risk clears, 10-14 days on. The season ends by November 8 in Huntsville, once hard frosts set back in. That date is a median: Huntsville freezes sooner in half of years.
Similar climates: Redstone Arsenal, AL, Madison, AL, Triana, AL, Moores Mill, AL, Harvest, AL.
Frequently asked
- When does it freeze in Huntsville?
- Frost typically leaves Huntsville by March 24 and returns to Huntsville near November 8.
- What is the rainy season in Huntsville?
- December is the wettest month in Huntsville, about 5.9 inches on average; the year totals roughly 54 inches.
- What is the warmest month in Huntsville?
- On average July tops the year in Huntsville at about 81°F.
- What is the coldest month in Huntsville?
- The coldest stretch in Huntsville falls in January, around 43°F on average.
- When can I start a vegetable garden in Huntsville?
- Around March 24, start frost-hardy crops in Huntsville; tomatoes and basil belong a fortnight later.
- How many rainy days does Huntsville get?
- Huntsville records around 79 days of measurable precipitation annually.
- What hardiness zone is Huntsville?
- Since January in Huntsville averages 43°F, Huntsville's USDA zone follows that floor — confirm it by ZIP.
- What is the 10-day forecast for Huntsville?
- Huntsville's extended outlook — daily high and low temperatures and precipitation chances for each upcoming day — is in the daily forecast above.
- Will it rain this week in Huntsville?
- See this week's day-by-day rain chances for Huntsville in the daily forecast above, and the next 24 hours in the hourly chart.
- What is the weather like right now in Huntsville?
- Current conditions for Huntsville and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
- How often is the Huntsville forecast updated?
- The Huntsville forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
- When are sunrise and sunset in Huntsville?
- Today's sunrise and sunset times for Huntsville are in the Almanac section above, along with civil dawn, civil dusk, and day length. Day length is longest near the summer solstice and shortest near the winter solstice.
- How accurate is the weather forecast for Huntsville?
- The next few days in Huntsville's forecast are the most reliable; accuracy declines beyond about a week as weather-model uncertainty grows.
Huntsville sits at 34.7°N; its climate zone is humid subtropical (Köppen approximation).
ZIP codes in Huntsville
- 35741
- 35742
- 35756
- 35757
- 35762
- 35763
- 35801
- 35802
- 35803
- 35804
- 35805
- 35806
- 35807
- 35808
- 35809
- 35810
- 35811
- 35814
- 35815
- 35816
- 35824
- 35893
- 35894
- 35895
- 35896
- 35897
- 35899