Climate averages 1991–2020
Columbia (South Carolina), United States weather
in September.
A hot, wet month: the 4th warmest and the 9th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a hot month in Columbia (South Carolina), United States: daytime highs average 28.3°C and nights cool to about 19.0°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 94 mm of rain on roughly 9 days, which makes September a wet month (the 9th 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 Rock Hill (103 km away). In September its highs average 27.4°C, 1.0°C cooler than Columbia (South Carolina), United States, with 93 mm of rain.
Among the 498 cities listed in the United States, Columbia (South Carolina), United States ranks joint 194th of 498 for the warmest September highs and joint 365th of 498 for the driest September (rainfall, lowest first). The mean September high of those 498 cities is 26.9°C; Columbia (South Carolina), United States is 1.4°C warmer than that mean.
From September to October, average highs fall by 5.0°C to 23.3°C, and monthly rainfall falls from 94 mm to 84 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
Columbia (South 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 | 12.3°C2.7°C | 2.7°C | 89 | 9.1 | 10.210 h |
| February | 14.4°C3.9°C | 3.9°C | 87 | 8.3 | 10.911 h |
| March | 18.4°C7.1°C | 7.1°C | 89 | 9.3 | 12.012 h |
| April | 23.4°C11.4°C | 11.4°C | 85 | 8.1 | 13.013 h |
| May | 27.6°C16.3°C | 16.3°C | 76 | 9.3 | 13.914 h |
| June | 30.7°C20.7°C | 20.7°C | 108 | 13.4 | 14.414 h |
| July | 32.3°C22.7°C | 22.7°C | 112 | 15.2 | 14.214 h |
| August | 31.2°C22.0°C | 22.0°C | 107 | 13.4 | 13.413 h |
| September, selected | 28.3°C19.0°C | 19.0°C | 94 | 8.8 | 12.412 h |
| October | 23.3°C13.1°C | 13.1°C | 84 | 7.1 | 11.411 h |
| November | 17.8°C7.4°C | 7.4°C | 72 | 7.2 | 10.410 h |
| December | 13.6°C4.2°C | 4.2°C | 93 | 8.8 | 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
- Rock Hill in SeptemberUnited States · 103 kmHigh 27.4°C · Low 18.4°C · 93 mm rain
- Charlotte in SeptemberUnited States · 137 kmHigh 27.1°C · Low 17.7°C · 98 mm rain
- Gastonia in SeptemberUnited States · 141 kmHigh 26.9°C · Low 18.0°C · 97 mm rain
- North Charleston in SeptemberUnited States · 161 kmHigh 27.9°C · Low 21.3°C · 128 mm rain
- Concord (North Carolina), United States in SeptemberUnited States · 162 kmHigh 27.2°C · Low 18.1°C · 103 mm rain
- Charleston in SeptemberUnited States · 170 kmHigh 27.6°C · Low 22.2°C · 128 mm rain
- Savannah in SeptemberUnited States · 213 kmHigh 28.4°C · Low 21.8°C · 122 mm rain
- Athens, United States in SeptemberUnited States · 216 kmHigh 27.9°C · Low 18.6°C · 92 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 Columbia) is explained once on the Columbia (South Carolina), United States year overview and on the Sources, method and limits page.