Climate averages 1991–2020
Roanoke weather
in September.
A warm, wet month: the 4th warmest and one of the wettest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a warm month in Roanoke: daytime highs average 25.5°C and nights cool to about 15.7°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 102 mm of rain on roughly 9 days, which makes September a wet month (one of the wettest months of the year). Daylight, from sunrise to sunset, lasts about 12 h 27 min on an average September day.
The nearest other city in this atlas is Lynchburg (72 km away). In September its highs average 26.0°C, about as warm as Roanoke, with 104 mm of rain.
Among the 498 cities listed in the United States, Roanoke ranks joint 295th of 498 for the warmest September highs and joint 406th of 498 for the driest September (rainfall, lowest first). The mean September high of those 498 cities is 26.9°C; Roanoke is 1.4°C cooler than that mean.
From September to October, average highs fall by 5.7°C to 19.8°C, and monthly rainfall falls from 102 mm to 79 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
Roanoke climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 6.9°C-2.1°C | -2.1°C | 83 | 8.6 | 9.910 h |
| February | 9.0°C-1.1°C | -1.1°C | 75 | 8.5 | 10.811 h |
| March | 13.5°C2.5°C | 2.5°C | 102 | 10.6 | 11.912 h |
| April | 19.3°C7.4°C | 7.4°C | 90 | 10.2 | 13.113 h |
| May | 23.5°C12.7°C | 12.7°C | 95 | 12.3 | 14.114 h |
| June | 27.8°C17.4°C | 17.4°C | 91 | 11.7 | 14.715 h |
| July | 30.0°C19.8°C | 19.8°C | 83 | 11.6 | 14.514 h |
| August | 29.1°C19.1°C | 19.1°C | 76 | 9.8 | 13.614 h |
| September, selected | 25.5°C15.7°C | 15.7°C | 102 | 9.3 | 12.512 h |
| October | 19.8°C9.4°C | 9.4°C | 79 | 7.2 | 11.311 h |
| November | 13.5°C3.6°C | 3.6°C | 76 | 7.5 | 10.210 h |
| December | 8.5°C-0.2°C | -0.2°C | 84 | 8.3 | 9.710 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
- Lynchburg in SeptemberUnited States · 72 kmHigh 26.0°C · Low 16.6°C · 104 mm rain
- Winston-Salem in SeptemberUnited States · 133 kmHigh 26.4°C · Low 17.0°C · 101 mm rain
- Greensboro in SeptemberUnited States · 134 kmHigh 26.2°C · Low 17.1°C · 105 mm rain
- High Point in SeptemberUnited States · 146 kmHigh 26.3°C · Low 17.1°C · 105 mm rain
- Durham in SeptemberUnited States · 170 kmHigh 26.9°C · Low 17.9°C · 112 mm rain
- Cary in SeptemberUnited States · 194 kmHigh 26.6°C · Low 18.2°C · 120 mm rain
- Raleigh in SeptemberUnited States · 203 kmHigh 26.9°C · Low 18.4°C · 120 mm rain
- Concord (North Carolina), United States in SeptemberUnited States · 215 kmHigh 27.2°C · Low 18.1°C · 103 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 Roanoke) is explained once on the Roanoke year overview and on the Sources, method and limits page.