Measured, not vibes
Best Time to Visit Charleston
By measured weather comfort, the top months for Charleston are October, April, November — and RouteVerdict's editorial pick, which also weighs crowds and prices, is March, April, May, October, November. The table below is computed from ERA5 reanalysis data for 2020–2024, measured at Charleston (6 m elevation).
Month by month
Charleston weather and comfort, 2020–2024
| Month | Avg high | Wet days | Comfort | Season |
|---|---|---|---|---|
| January | 15.3°C / 60°F | 8.5 | 58 | |
| February | 16.8°C / 62°F | 8.5 | 66 | Shoulder |
| March | 20.2°C / 68°F | 8 | 80 | |
| April | 23.3°C / 74°F | 6 | 88 | Best |
| May | 26.4°C / 80°F | 9.8 | 75 | |
| June | 29.1°C / 84°F | 13.7 | 58 | |
| July | 30.8°C / 87°F | 15 | 48 | |
| August | 29.9°C / 86°F | 16.2 | 50 | |
| September | 27.9°C / 82°F | 11.8 | 66 | Shoulder |
| October | 24.4°C / 76°F | 5 | 89 | Best |
| November | 20.2°C / 68°F | 7.3 | 81 | Best |
| December | 16.3°C / 61°F | 7.2 | 65 |
Comfort is RouteVerdict's 0–100 score: 100·exp(−(high−23)²/162) × (1 − min(0.35, wet days × 0.02)). The full method is on the methodology page. Weather data by Open-Meteo.com (ERA5, CC BY 4.0), 2020–2024 normals. Wet day = ≥1 mm precipitation.
What the seasons are actually like
Traveling to Charleston month by month
Charleston's comfort score peaks in October at 88.9, with an average high of 24.4°C and just 5 wet days, ahead of April's 88 and November's 81.4. Summer (June–August) brings the heaviest rainfall, up to 16.2 wet days in August, and comfort drops to 48.1–57.7 as heat and humidity combine — July's 48.1 is the lowest of the year outside winter. Winter (December–February) sees highs of 15.3–16.8°C and comfort scores of 57.6–65.5.
FAQ
Charleston timing questions
What is the best month to visit Charleston?
By measured weather comfort (ERA5 2020–2024), the top months are October, April, and November, with October scoring highest. RouteVerdict's editorial pick is March, April, May, October, and November, which also weighs crowds, prices, and events.
What is the hottest month in Charleston?
July, with an average daily high of 30.8°C (87°F).
What is the rainiest month in Charleston?
August, averaging 16.2 days with at least 1 mm of precipitation.
When is shoulder season in Charleston?
September and February — the best-scoring months outside both the measured top three and RouteVerdict's editorial peak-season pick.
What is Charleston's least comfortable summer month?
July, with a comfort score of just 48.1 — the lowest of the year outside winter — as heat and 15 wet days combine.
What is Charleston's single best month for weather?
October, with an average high of 24.4°C, just 5 wet days, and a comfort score of 88.9 — the highest measured for any month.