Climate averages 1991–2020
Charleston weather
in June.
A hot, wet month: the 3rd warmest and the 10th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
June is a hot month in Charleston: daytime highs average 29.0°C and nights cool to about 23.2°C. By daytime temperature it is the 3rd warmest of the 12 months.
Expect about 130 mm of rain on roughly 16 days, which makes June a wet month (the 10th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 16 min on an average June day.
The nearest other city in this atlas is North Charleston (10 km away). In June its highs average 29.7°C, 0.8°C warmer than Charleston, with 130 mm of rain.
Among the 498 cities listed in the United States, Charleston ranks joint 191st of 498 for the warmest June highs and joint 456th of 498 for the driest June (rainfall, lowest first). The mean June high of those 498 cities is 27.9°C; Charleston is 1.1°C warmer than that mean.
From June to July, average highs rise by 1.4°C to 30.4°C, and monthly rainfall rises from 130 mm to 138 mm.
The annual picture
June 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
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°C7.1°C | 7.1°C | 81 | 8.4 | 10.310 h |
| February | 15.9°C8.4°C | 8.4°C | 84 | 7.8 | 11.011 h |
| March | 18.6°C11.2°C | 11.2°C | 81 | 8.2 | 12.012 h |
| April | 22.3°C15.0°C | 15.0°C | 74 | 7.5 | 13.013 h |
| May | 26.2°C19.5°C | 19.5°C | 68 | 9.0 | 13.814 h |
| June, selected | 29.0°C23.2°C | 23.2°C | 130 | 16.3 | 14.314 h |
| July | 30.4°C24.9°C | 24.9°C | 138 | 17.7 | 14.114 h |
| August | 29.6°C24.5°C | 24.5°C | 160 | 18.9 | 13.413 h |
| September | 27.6°C22.2°C | 22.2°C | 128 | 13.2 | 12.412 h |
| October | 23.8°C17.3°C | 17.3°C | 101 | 7.8 | 11.411 h |
| November | 19.1°C12.1°C | 12.1°C | 65 | 6.7 | 10.511 h |
| December | 15.9°C8.9°C | 8.9°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
June in nearby cities
- North Charleston in JuneUnited States · 10 kmHigh 29.7°C · Low 22.4°C · 130 mm rain
- Savannah in JuneUnited States · 134 kmHigh 30.1°C · Low 22.5°C · 117 mm rain
- Columbia (South Carolina), United States in JuneUnited States · 170 kmHigh 30.7°C · Low 20.7°C · 108 mm rain
- Wilmington (North Carolina), United States in JuneUnited States · 245 kmHigh 28.2°C · Low 22.0°C · 125 mm rain
- Rock Hill in JuneUnited States · 259 kmHigh 29.8°C · Low 20.1°C · 96 mm rain
- Fayetteville in JuneUnited States · 271 kmHigh 30.2°C · Low 20.6°C · 106 mm rain
- Charlotte in JuneUnited States · 285 kmHigh 29.7°C · Low 19.4°C · 95 mm rain
- Concord (North Carolina), United States in JuneUnited States · 299 kmHigh 29.8°C · Low 19.9°C · 99 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 Charleston) is explained once on the Charleston year overview and on the Sources, method and limits page.
North 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.