Climate averages 1991–2020
Birmingham, United States weather
in September.
A hot, moderately wet month: the 4th warmest and one of the 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 Birmingham, United States: daytime highs average 28.9°C and nights cool to about 19.2°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 86 mm of rain on roughly 8 days, which makes September a moderately wet month (one of the driest months of the year). Daylight, from sunrise to sunset, lasts about 12 h 25 min on an average September day.
The nearest other city in this atlas is Hoover (13 km away). In September its highs average 28.9°C, about as warm as Birmingham, United States, with 86 mm of rain.
Among the 498 cities listed in the United States, Birmingham, United States ranks joint 175th of 498 for the warmest September highs and joint 314th of 498 for the driest September (rainfall, lowest first). The mean September high of those 498 cities is 26.9°C; Birmingham, United States is 2.0°C warmer than that mean.
From September to October, average highs fall by 5.3°C to 23.6°C, and monthly rainfall stays at 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
Birmingham, United States climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 11.7°C2.4°C | 2.4°C | 126 | 9.8 | 10.210 h |
| February | 14.1°C3.9°C | 3.9°C | 130 | 10.7 | 11.011 h |
| March | 18.2°C7.3°C | 7.3°C | 146 | 11.4 | 12.012 h |
| April | 22.3°C11.3°C | 11.3°C | 118 | 9.6 | 13.013 h |
| May | 26.8°C16.1°C | 16.1°C | 100 | 10.3 | 13.914 h |
| June | 30.1°C20.4°C | 20.4°C | 108 | 13.4 | 14.314 h |
| July | 31.6°C22.4°C | 22.4°C | 114 | 14.7 | 14.114 h |
| August | 31.5°C22.1°C | 22.1°C | 95 | 12.7 | 13.413 h |
| September, selected | 28.9°C19.2°C | 19.2°C | 86 | 7.8 | 12.412 h |
| October | 23.6°C13.3°C | 13.3°C | 86 | 7.1 | 11.411 h |
| November | 17.3°C7.2°C | 7.2°C | 105 | 8.1 | 10.510 h |
| December | 13.0°C3.8°C | 3.8°C | 132 | 10.5 | 10.010 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
- Hoover in SeptemberUnited States · 13 kmHigh 28.9°C · Low 19.3°C · 86 mm rain
- Tuscaloosa in SeptemberUnited States · 79 kmHigh 29.9°C · Low 20.0°C · 80 mm rain
- Huntsville in SeptemberUnited States · 136 kmHigh 28.1°C · Low 18.6°C · 92 mm rain
- Montgomery in SeptemberUnited States · 137 kmHigh 30.2°C · Low 20.4°C · 78 mm rain
- South Fulton in SeptemberUnited States · 197 kmHigh 27.6°C · Low 18.7°C · 88 mm rain
- Columbus, United States in SeptemberUnited States · 206 kmHigh 29.8°C · Low 20.1°C · 86 mm rain
- Chattanooga in SeptemberUnited States · 218 kmHigh 27.5°C · Low 18.1°C · 99 mm rain
- East Chattanooga in SeptemberUnited States · 223 kmHigh 27.4°C · Low 18.0°C · 99 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 Birmingham) is explained once on the Birmingham, United States year overview and on the Sources, method and limits page.
Hoover lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.