Climate averages 1991–2020
Redding weather
in September.
A hot, very dry month: the 3rd warmest and the 3rd driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a hot month in Redding: daytime highs average 32.1°C and nights cool to about 16.7°C. By daytime temperature it is the 3rd warmest of the 12 months.
Expect about 13 mm of rain on roughly 2 days, which makes September a very dry month (the 3rd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 30 min on an average September day.
The nearest other city in this atlas is Chico (106 km away). In September its highs average 31.9°C, about as warm as Redding, with 7.5 mm of rain.
Among the 498 cities listed in the United States, Redding ranks 27th of 498 for the warmest September highs and 116th of 498 for the driest September (rainfall, lowest first). The mean September high of those 498 cities is 26.9°C; Redding is 5.2°C warmer than that mean.
From September to October, average highs fall by 7.4°C to 24.7°C, and monthly rainfall rises from 13 mm to 70 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
Redding climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 12.5°C3.3°C | 3.3°C | 236 | 12.5 | 9.610 h |
| February | 14.2°C4.0°C | 4.0°C | 218 | 11.6 | 10.611 h |
| March | 16.8°C5.5°C | 5.5°C | 189 | 12.3 | 11.912 h |
| April | 20.2°C7.7°C | 7.7°C | 94 | 9.0 | 13.313 h |
| May | 26.0°C12.1°C | 12.1°C | 58 | 6.2 | 14.414 h |
| June | 32.0°C16.7°C | 16.7°C | 24 | 2.8 | 15.015 h |
| July | 36.9°C20.9°C | 20.9°C | 2.3 | 0.4 | 14.815 h |
| August | 35.6°C20.1°C | 20.1°C | 4.9 | 0.6 | 13.814 h |
| September, selected | 32.1°C16.7°C | 16.7°C | 13 | 1.7 | 12.513 h |
| October | 24.7°C11.7°C | 11.7°C | 70 | 4.6 | 11.211 h |
| November | 16.3°C6.5°C | 6.5°C | 142 | 8.8 | 10.010 h |
| December | 11.9°C3.5°C | 3.5°C | 253 | 12.9 | 9.39 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
- Chico in SeptemberUnited States · 106 kmHigh 31.9°C · Low 16.3°C · 7.5 mm rain
- Medford in SeptemberUnited States · 198 kmHigh 26.9°C · Low 11.7°C · 22 mm rain
- Roseville in SeptemberUnited States · 225 kmHigh 30.9°C · Low 15.4°C · 4.2 mm rain
- Citrus Heights in SeptemberUnited States · 230 kmHigh 30.8°C · Low 15.3°C · 4.2 mm rain
- Sacramento in SeptemberUnited States · 236 kmHigh 31.1°C · Low 15.4°C · 2.3 mm rain
- Folsom in SeptemberUnited States · 236 kmHigh 30.7°C · Low 15.3°C · 4.2 mm rain
- Arden-Arcade in SeptemberUnited States · 237 kmHigh 30.9°C · Low 15.4°C · 2.3 mm rain
- Santa Rosa, United States in SeptemberUnited States · 240 kmHigh 28.4°C · Low 13.6°C · 3.1 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 Redding) is explained once on the Redding year overview and on the Sources, method and limits page.