Climate averages 1991–2020
Jackson weather
in September.
A hot, moderately wet month: the 4th warmest and the driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a hot month in Jackson: daytime highs average 30.4°C and nights cool to about 19.9°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 83 mm of rain on roughly 7 days, which makes September a moderately wet month (the driest month of the year). Daylight, from sunrise to sunset, lasts about 12 h 24 min on an average September day.
The nearest other city in this atlas is Baton Rouge (227 km away). In September its highs average 30.1°C, about as warm as Jackson, with 100 mm of rain.
Among the 498 cities listed in the United States, Jackson ranks joint 97th of 498 for the warmest September highs and joint 294th of 498 for the driest September (rainfall, lowest first). The mean September high of those 498 cities is 26.9°C; Jackson is 3.5°C warmer than that mean.
From September to October, average highs fall by 5.2°C to 25.1°C, and monthly rainfall rises from 83 mm to 91 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
Jackson climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 13.2°C3.6°C | 3.6°C | 121 | 9.7 | 10.310 h |
| February | 15.6°C5.2°C | 5.2°C | 120 | 9.8 | 11.011 h |
| March | 19.5°C8.8°C | 8.8°C | 121 | 10.4 | 12.012 h |
| April | 23.7°C12.7°C | 12.7°C | 114 | 8.6 | 13.013 h |
| May | 28.1°C17.3°C | 17.3°C | 104 | 9.7 | 13.814 h |
| June | 31.4°C21.3°C | 21.3°C | 87 | 11.4 | 14.214 h |
| July | 32.5°C23.0°C | 23.0°C | 102 | 13.8 | 14.014 h |
| August | 32.6°C22.7°C | 22.7°C | 95 | 11.5 | 13.313 h |
| September, selected | 30.4°C19.9°C | 19.9°C | 83 | 7.3 | 12.412 h |
| October | 25.1°C14.0°C | 14.0°C | 91 | 7.4 | 11.411 h |
| November | 18.6°C8.1°C | 8.1°C | 92 | 7.8 | 10.511 h |
| December | 14.4°C4.8°C | 4.8°C | 119 | 9.4 | 10.110 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
- Baton Rouge in SeptemberUnited States · 227 kmHigh 30.1°C · Low 21.8°C · 100 mm rain
- Gulfport in SeptemberUnited States · 238 kmHigh 28.8°C · Low 22.9°C · 144 mm rain
- Metairie in SeptemberUnited States · 257 kmHigh 29.1°C · Low 23.5°C · 118 mm rain
- New Orleans in SeptemberUnited States · 261 kmHigh 28.9°C · Low 23.5°C · 123 mm rain
- Tuscaloosa in SeptemberUnited States · 265 kmHigh 29.9°C · Low 20.0°C · 80 mm rain
- Mobile in SeptemberUnited States · 270 kmHigh 29.4°C · Low 22.2°C · 117 mm rain
- Lafayette (Louisiana), United States in SeptemberUnited States · 289 kmHigh 30.3°C · Low 22.0°C · 96 mm rain
- Memphis in SeptemberUnited States · 317 kmHigh 28.7°C · Low 18.9°C · 74 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 Jackson) is explained once on the Jackson year overview and on the Sources, method and limits page.