Climate averages 1991–2020
Charleston weather
in March.
A mild, moderately wet month: the 9th warmest and the joint 4th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
March is a mild month in Charleston: daytime highs average 18.6°C and nights cool to about 11.2°C. By daytime temperature it is the 9th warmest of the 12 months.
Expect about 81 mm of rain on roughly 8 days, which makes March a moderately wet month (the joint 4th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 57 min on an average March day.
The nearest other city in this atlas is North Charleston (10 km away). In March its highs average 19.2°C, 0.6°C warmer than Charleston, with 81 mm of rain.
Among the 498 cities listed in the United States, Charleston ranks joint 172nd of 498 for the warmest March highs and joint 282nd of 498 for the driest March (rainfall, lowest first). The mean March high of those 498 cities is 14.9°C; Charleston is 3.7°C warmer than that mean.
From March to April, average highs rise by 3.7°C to 22.3°C, and monthly rainfall falls from 81 mm to 74 mm.
The annual picture
March 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, selected | 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 | 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
March in nearby cities
- North Charleston in MarchUnited States · 10 kmHigh 19.2°C · Low 10.1°C · 81 mm rain
- Savannah in MarchUnited States · 134 kmHigh 20.0°C · Low 10.7°C · 80 mm rain
- Columbia (South Carolina), United States in MarchUnited States · 170 kmHigh 18.4°C · Low 7.1°C · 89 mm rain
- Wilmington (North Carolina), United States in MarchUnited States · 245 kmHigh 17.0°C · Low 9.0°C · 101 mm rain
- Rock Hill in MarchUnited States · 259 kmHigh 16.7°C · Low 6.2°C · 107 mm rain
- Fayetteville in MarchUnited States · 271 kmHigh 17.3°C · Low 6.4°C · 94 mm rain
- Charlotte in MarchUnited States · 285 kmHigh 16.1°C · Low 5.0°C · 106 mm rain
- Concord (North Carolina), United States in MarchUnited States · 299 kmHigh 16.1°C · Low 5.5°C · 107 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.