Yearly weather and climate in Charleston, United States
The yearly weather in Charleston runs from around 8°C in January to 31°C in July. October is the driest month at 4 rainy days; July the wettest at 19. Here is the annual climate data, so you know what you are packing for.
Best time to visit
The best weather is typically in Mar, Oct, Nov, with mild temperatures and lower rainfall.
Sunshine
Expect up to 12.1 hours of clear skies in Jun, but only 7.1 hours in Dec. Pack sunglasses and SPF accordingly.
Rainfall
It rains the most in Aug (169mm over 17 days). A reliable rain jacket is a must-have if visiting then.
Day-to-night swings
Temperatures typically drop by 7°C from day to night. Make sure to pack layers for the evenings.
Average temperatures and rainfall
Daily highs and lows in Charleston, averaged over 10 years of recorded weather, with the number of days it typically rains.
- 1660°846°11Jan
- 1864°1049°7Feb
- 2068°1254°8Mar
- 2373°1559°9Apr
- 2679°1966°13May
- 2984°2373°16Jun
- 3188°2577°19Jul
- 3087°2476°17Aug
- 2882°2170°11Sep
- 2476°1661°4Oct
- 2068°1355°8Nov
- 1660°847°8Dec
Bars span the average daily low to high. Numbers under the drop are rainy days per month (1mm or more) — hover a month for its total rainfall. Oct is typically driest at 4 days (45mm); Jul the wettest at 19 days (158mm).
| Month | Average high | Average low | Rainy days | Total rainfall |
|---|---|---|---|---|
| Jan | 16°C | 8°C | 11 | 98mm |
| Feb | 18°C | 10°C | 7 | 106mm |
| Mar | 20°C | 12°C | 8 | 91mm |
| Apr | 23°C | 15°C | 9 | 122mm |
| May | 26°C | 19°C | 13 | 104mm |
| Jun | 29°C | 23°C | 16 | 128mm |
| Jul | 31°C | 25°C | 19 | 158mm |
| Aug | 30°C | 24°C | 17 | 169mm |
| Sep | 28°C | 21°C | 11 | 89mm |
| Oct | 24°C | 16°C | 4 | 45mm |
| Nov | 20°C | 13°C | 8 | 56mm |
| Dec | 16°C | 8°C | 8 | 144mm |
Weather data by Open-Meteo.com
Pack smarter.
Averages get you close, but the week you travel is what matters. Get the live forecast, a smart packing list, and discover the best local spots and activities in Charleston with Packola.
Get the app