Climate averages 1991–2020
North Charleston weather
in August.
A hot, wet month: the 2nd warmest and the wettest of the year.
Long-term climate patterns, not a forecast for a particular trip.
August is a hot month in North Charleston: daytime highs average 30.1°C and nights cool to about 23.8°C. By daytime temperature it is the 2nd warmest of the 12 months.
Expect about 160 mm of rain on roughly 19 days, which makes August a wet month (the wettest month of the year). Daylight, from sunrise to sunset, lasts about 13 h 22 min on an average August day.
The nearest other city in this atlas is Charleston (10 km away). In August its highs average 29.6°C, 0.6°C cooler than North Charleston, with 160 mm of rain.
Among the 498 cities listed in the United States, North Charleston ranks joint 232nd of 498 for the warmest August highs and joint 480th of 498 for the driest August (rainfall, lowest first). The mean August high of those 498 cities is 29.9°C; North Charleston is 0.2°C warmer than that mean.
From August to September, average highs fall by 2.2°C to 27.9°C, and monthly rainfall falls from 160 mm to 128 mm.
The annual picture
August 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
North Charleston climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 14.4°C5.8°C | 5.8°C | 81 | 8.4 | 10.210 h |
| February | 16.1°C7.2°C | 7.2°C | 84 | 7.8 | 11.011 h |
| March | 19.2°C10.1°C | 10.1°C | 81 | 8.2 | 12.012 h |
| April | 23.1°C14.0°C | 14.0°C | 74 | 7.5 | 13.013 h |
| May | 27.1°C18.5°C | 18.5°C | 68 | 9.0 | 13.814 h |
| June | 29.7°C22.4°C | 22.4°C | 130 | 16.3 | 14.314 h |
| July | 31.0°C24.2°C | 24.2°C | 138 | 17.7 | 14.114 h |
| August, selected | 30.1°C23.8°C | 23.8°C | 160 | 18.9 | 13.413 h |
| September | 27.9°C21.3°C | 21.3°C | 128 | 13.2 | 12.412 h |
| October | 23.9°C16.1°C | 16.1°C | 101 | 7.8 | 11.411 h |
| November | 19.2°C10.7°C | 10.7°C | 65 | 6.7 | 10.511 h |
| December | 15.8°C7.5°C | 7.5°C | 86 | 7.6 | 10.010 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
August in nearby cities
- Charleston in AugustUnited States · 10 kmHigh 29.6°C · Low 24.5°C · 160 mm rain
- Savannah in AugustUnited States · 136 kmHigh 30.4°C · Low 23.9°C · 150 mm rain
- Columbia (South Carolina), United States in AugustUnited States · 161 kmHigh 31.2°C · Low 22.0°C · 107 mm rain
- Wilmington (North Carolina), United States in AugustUnited States · 243 kmHigh 29.0°C · Low 23.4°C · 183 mm rain
- Rock Hill in AugustUnited States · 250 kmHigh 30.4°C · Low 21.4°C · 102 mm rain
- Fayetteville in AugustUnited States · 265 kmHigh 30.5°C · Low 21.9°C · 125 mm rain
- Charlotte in AugustUnited States · 276 kmHigh 30.2°C · Low 20.8°C · 96 mm rain
- Concord (North Carolina), United States in AugustUnited States · 289 kmHigh 30.4°C · Low 21.2°C · 96 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 North Charleston) is explained once on the North Charleston year overview and on the Sources, method and limits page.
Charleston lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.