Climate averages 1991–2020
Wilmington (North Carolina), United States weather
in September.
A warm, wet month: the 4th warmest and the 11th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a warm month in Wilmington (North Carolina), United States: daytime highs average 26.8°C and nights cool to about 21.1°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 166 mm of rain on roughly 13 days, which makes September a wet month (the 11th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 25 min on an average September day.
The nearest other city in this atlas is Fayetteville (125 km away). In September its highs average 27.6°C, 0.8°C warmer than Wilmington (North Carolina), United States, with 128 mm of rain.
Among the 498 cities listed in the United States, Wilmington (North Carolina), United States ranks 249th of 498 for the warmest September highs and 490th of 498 for the driest September (rainfall, lowest first). The mean September high of those 498 cities is 26.9°C; Wilmington (North Carolina), United States is 0.1°C cooler than that mean.
From September to October, average highs fall by 4.1°C to 22.7°C, and monthly rainfall falls from 166 mm to 100 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
Wilmington (North Carolina), United States climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 12.8°C5.2°C | 5.2°C | 91 | 9.3 | 10.110 h |
| February | 14.2°C6.2°C | 6.2°C | 88 | 8.8 | 10.911 h |
| March | 17.0°C9.0°C | 9.0°C | 101 | 9.2 | 11.912 h |
| April | 21.0°C13.3°C | 13.3°C | 82 | 8.1 | 13.013 h |
| May | 24.9°C17.8°C | 17.8°C | 93 | 10.5 | 13.914 h |
| June | 28.2°C22.0°C | 22.0°C | 125 | 14.5 | 14.414 h |
| July | 29.7°C24.0°C | 24.0°C | 159 | 17.6 | 14.214 h |
| August | 29.0°C23.4°C | 23.4°C | 183 | 17.4 | 13.413 h |
| September, selected | 26.8°C21.1°C | 21.1°C | 166 | 13.4 | 12.412 h |
| October | 22.7°C15.9°C | 15.9°C | 100 | 8.1 | 11.411 h |
| November | 17.9°C10.6°C | 10.6°C | 89 | 8.0 | 10.410 h |
| December | 14.5°C7.1°C | 7.1°C | 97 | 9.1 | 9.910 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
- Fayetteville in SeptemberUnited States · 125 kmHigh 27.6°C · Low 19.0°C · 128 mm rain
- Greenville in SeptemberUnited States · 162 kmHigh 27.0°C · Low 19.0°C · 132 mm rain
- Raleigh in SeptemberUnited States · 182 kmHigh 26.9°C · Low 18.4°C · 120 mm rain
- Cary in SeptemberUnited States · 189 kmHigh 26.6°C · Low 18.2°C · 120 mm rain
- Durham in SeptemberUnited States · 214 kmHigh 26.9°C · Low 17.9°C · 112 mm rain
- North Charleston in SeptemberUnited States · 243 kmHigh 27.9°C · Low 21.3°C · 128 mm rain
- Charleston in SeptemberUnited States · 245 kmHigh 27.6°C · Low 22.2°C · 128 mm rain
- Greensboro in SeptemberUnited States · 264 kmHigh 26.2°C · Low 17.1°C · 105 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 Wilmington) is explained once on the Wilmington (North Carolina), United States year overview and on the Sources, method and limits page.