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Weather & Climate
Charleston County, South Carolina, United States
Overview
Climate data and monthly weather averages for Charleston County.
Key Metrics
Annual Avg
20.6°C
Summer Avg
27.4°C
Winter Avg
13.6°C
Record High
33°C
Record Low
-2.9°C
Annual Precipitation
1238.6 mm
Avg Humidity
78%
Summer Humidity
79%
Winter Humidity
78%
Monthly Averages
| Month | High (°C) | Avg (°C) | Low (°C) | Rain (mm) | Humidity (%) | Sunshine (h) | Wind (kph) |
|---|---|---|---|---|---|---|---|
| Jan | 21.6° | 12.4° | -2.9° | 62 | 78% | 86 | 67 |
| Feb | 21.7° | 13.6° | -0.7° | 78.4 | 78% | 97 | 62.7 |
| Mar | 24.2° | 15.8° | 2.2° | 82.5 | 78% | 143 | 66.2 |
| Apr | 28.2° | 19.2° | 8° | 78.6 | 78% | 180 | 66.5 |
| May | 31.9° | 23.2° | 12.6° | 91.1 | 78% | 203 | 57.4 |
| Jun | 32.6° | 26.6° | 18.7° | 141.3 | 79% | 196 | 65.3 |
| Jul | 33° | 27.9° | 23.2° | 142.3 | 79% | 196 | 52.8 |
| Aug | 32.9° | 27.8° | 21.8° | 172.7 | 80% | 176 | 61.6 |
| Sep | 32.3° | 26.1° | 16.6° | 126.9 | 78% | 145 | 82.1 |
| Oct | 29.8° | 22.3° | 9° | 106.3 | 76% | 126 | 82.4 |
| Nov | 25.4° | 17.5° | 4.1° | 65.4 | 77% | 93 | 57.6 |
| Dec | 22.8° | 14.7° | 0.2° | 91.1 | 79% | 77 | 64 |
Frequently Asked Questions
Sources: NASA POWER · Last updated: 2025
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