Climate averages 1991–2020
Huntsville weather
in September.
A hot, wet month: the 4th warmest and the 3rd driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
September is a hot month in Huntsville: daytime highs average 28.1°C and nights cool to about 18.6°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 92 mm of rain on roughly 8 days, which makes September a wet month (the 3rd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 26 min on an average September day.
The nearest other city in this atlas is Chattanooga (122 km away). In September its highs average 27.5°C, 0.6°C cooler than Huntsville, with 99 mm of rain.
Among the 498 cities listed in the United States, Huntsville ranks joint 201st of 498 for the warmest September highs and joint 350th of 498 for the driest September (rainfall, lowest first). The mean September high of those 498 cities is 26.9°C; Huntsville is 1.2°C warmer than that mean.
From September to October, average highs fall by 5.8°C to 22.3°C, and monthly rainfall falls from 92 mm to 86 mm.
The annual picture
September in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Huntsville climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 9.7°C1.1°C | 1.1°C | 129 | 10.3 | 10.110 h |
| February | 12.1°C2.6°C | 2.6°C | 124 | 11.1 | 10.911 h |
| March | 16.5°C6.2°C | 6.2°C | 145 | 11.8 | 11.912 h |
| April | 21.3°C10.7°C | 10.7°C | 126 | 10.4 | 13.013 h |
| May | 25.8°C15.7°C | 15.7°C | 106 | 11.0 | 14.014 h |
| June | 29.6°C20.1°C | 20.1°C | 105 | 12.4 | 14.414 h |
| July | 31.0°C22.0°C | 22.0°C | 112 | 12.8 | 14.214 h |
| August | 31.0°C21.7°C | 21.7°C | 78 | 11.1 | 13.513 h |
| September, selected | 28.1°C18.6°C | 18.6°C | 92 | 7.5 | 12.412 h |
| October | 22.3°C12.5°C | 12.5°C | 86 | 7.2 | 11.311 h |
| November | 15.7°C6.4°C | 6.4°C | 106 | 8.9 | 10.410 h |
| December | 11.1°C2.8°C | 2.8°C | 139 | 11.2 | 9.910 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
September in nearby cities
- Chattanooga in SeptemberUnited States · 122 kmHigh 27.5°C · Low 18.1°C · 99 mm rain
- Murfreesboro in SeptemberUnited States · 125 kmHigh 27.7°C · Low 18.0°C · 85 mm rain
- East Chattanooga in SeptemberUnited States · 127 kmHigh 27.4°C · Low 18.0°C · 99 mm rain
- Franklin in SeptemberUnited States · 135 kmHigh 27.5°C · Low 18.0°C · 82 mm rain
- Birmingham, United States in SeptemberUnited States · 136 kmHigh 28.9°C · Low 19.2°C · 86 mm rain
- Hoover in SeptemberUnited States · 149 kmHigh 28.9°C · Low 19.3°C · 86 mm rain
- Nashville in SeptemberUnited States · 161 kmHigh 27.6°C · Low 17.7°C · 83 mm rain
- Tuscaloosa in SeptemberUnited States · 192 kmHigh 29.9°C · Low 20.0°C · 80 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Huntsville) is explained once on the Huntsville year overview and on the Sources, method and limits page.