Climate averages 1991–2020
Richmond weather
in September.
A warm, wet month: the 4th warmest and the wettest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a warm month in Richmond: daytime highs average 26.3°C and nights cool to about 17.3°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 112 mm of rain on roughly 9 days, which makes September a wet month (the wettest month of the year). Daylight, from sunrise to sunset, lasts about 12 h 28 min on an average September day.
The nearest other city in this atlas is Newport News (111 km away). In September its highs average 26.2°C, about as warm as Richmond, with 115 mm of rain.
Among the 498 cities listed in the United States, Richmond ranks joint 266th of 498 for the warmest September highs and joint 431st of 498 for the driest September (rainfall, lowest first). The mean September high of those 498 cities is 26.9°C; Richmond is 0.6°C cooler than that mean.
From September to October, average highs fall by 5.8°C to 20.5°C, and monthly rainfall falls from 112 mm to 93 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
Richmond climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 7.9°C-0.8°C | -0.8°C | 85 | 9.2 | 9.910 h |
| February | 9.8°C-0.2°C | -0.2°C | 75 | 8.3 | 10.811 h |
| March | 14.1°C3.5°C | 3.5°C | 101 | 10.1 | 11.912 h |
| April | 19.9°C8.9°C | 8.9°C | 82 | 9.5 | 13.113 h |
| May | 24.4°C14.1°C | 14.1°C | 82 | 11.0 | 14.214 h |
| June | 28.8°C18.9°C | 18.9°C | 97 | 11.2 | 14.715 h |
| July | 31.1°C21.6°C | 21.6°C | 106 | 13.0 | 14.514 h |
| August | 29.9°C20.6°C | 20.6°C | 109 | 10.8 | 13.614 h |
| September, selected | 26.3°C17.3°C | 17.3°C | 112 | 9.3 | 12.512 h |
| October | 20.5°C11.1°C | 11.1°C | 93 | 7.6 | 11.311 h |
| November | 14.4°C5.2°C | 5.2°C | 82 | 7.8 | 10.210 h |
| December | 9.7°C1.1°C | 1.1°C | 89 | 8.8 | 9.610 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
- Newport News in SeptemberUnited States · 111 kmHigh 26.2°C · Low 19.1°C · 115 mm rain
- East Hampton in SeptemberUnited States · 115 kmHigh 25.8°C · Low 19.6°C · 110 mm rain
- Suffolk in SeptemberUnited States · 120 kmHigh 26.6°C · Low 18.8°C · 123 mm rain
- Portsmouth Heights in SeptemberUnited States · 126 kmHigh 26.4°C · Low 18.8°C · 120 mm rain
- Norfolk in SeptemberUnited States · 130 kmHigh 26.1°C · Low 19.1°C · 120 mm rain
- Centreville in SeptemberUnited States · 143 kmHigh 25.3°C · Low 16.8°C · 111 mm rain
- Alexandria, United States in SeptemberUnited States · 144 kmHigh 25.7°C · Low 17.2°C · 106 mm rain
- Lynchburg in SeptemberUnited States · 149 kmHigh 26.0°C · Low 16.6°C · 104 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 Richmond) is explained once on the Richmond year overview and on the Sources, method and limits page.