Climate averages 1991–2020
Mobile weather
in September.
A hot, wet month: the 4th warmest and the 7th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a hot month in Mobile: daytime highs average 29.4°C and nights cool to about 22.2°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 117 mm of rain on roughly 11 days, which makes September a wet month (the 7th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 23 min on an average September day.
The nearest other city in this atlas is Gulfport (107 km away). In September its highs average 28.8°C, 0.6°C cooler than Mobile, with 144 mm of rain.
Among the 498 cities listed in the United States, Mobile ranks joint 159th of 498 for the warmest September highs and joint 440th of 498 for the driest September (rainfall, lowest first). The mean September high of those 498 cities is 26.9°C; Mobile is 2.5°C warmer than that mean.
From September to October, average highs fall by 4.0°C to 25.4°C, and monthly rainfall falls from 117 mm to 88 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
Mobile climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 15.2°C7.1°C | 7.1°C | 119 | 9.1 | 10.410 h |
| February | 17.2°C8.9°C | 8.9°C | 110 | 8.4 | 11.111 h |
| March | 20.3°C11.8°C | 11.8°C | 119 | 9.0 | 12.012 h |
| April | 23.8°C15.4°C | 15.4°C | 107 | 8.4 | 12.913 h |
| May | 27.7°C19.7°C | 19.7°C | 87 | 9.6 | 13.714 h |
| June | 30.4°C23.3°C | 23.3°C | 128 | 14.8 | 14.114 h |
| July | 31.2°C24.6°C | 24.6°C | 150 | 18.8 | 13.914 h |
| August | 31.0°C24.4°C | 24.4°C | 140 | 18.4 | 13.313 h |
| September, selected | 29.4°C22.2°C | 22.2°C | 117 | 11.1 | 12.412 h |
| October | 25.4°C17.1°C | 17.1°C | 88 | 7.1 | 11.411 h |
| November | 20.1°C11.6°C | 11.6°C | 98 | 7.3 | 10.611 h |
| December | 16.6°C8.6°C | 8.6°C | 115 | 9.0 | 10.210 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
- Gulfport in SeptemberUnited States · 107 kmHigh 28.8°C · Low 22.9°C · 144 mm rain
- New Orleans in SeptemberUnited States · 212 kmHigh 28.9°C · Low 23.5°C · 123 mm rain
- Metairie in SeptemberUnited States · 217 kmHigh 29.1°C · Low 23.5°C · 118 mm rain
- Montgomery in SeptemberUnited States · 249 kmHigh 30.2°C · Low 20.4°C · 78 mm rain
- Jackson in SeptemberUnited States · 270 kmHigh 30.4°C · Low 19.9°C · 83 mm rain
- Tuscaloosa in SeptemberUnited States · 283 kmHigh 29.9°C · Low 20.0°C · 80 mm rain
- Baton Rouge in SeptemberUnited States · 302 kmHigh 30.1°C · Low 21.8°C · 100 mm rain
- Hoover in SeptemberUnited States · 323 kmHigh 28.9°C · Low 19.3°C · 86 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 Mobile) is explained once on the Mobile year overview and on the Sources, method and limits page.