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Best time to visit · South Carolina, United States
On the climate data, the best time to visit Charleston is March & April and November, scoring up to 88/100 with highs around 67°F (20°C) and 2.7 in (69 mm) of rain in November. February, May, October and December are good shoulder-season months. The toughest months are July & August, mainly because of rain.
Highs run from 57°F to 90°F across the year, and the yearly total is about 49.0 in (1245 mm) of rain.
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high | 57°F14°C | 61°F16°C | 67°F20°C | 75°F24°C | 83°F28°C | 88°F31°C | 90°F32°C | 89°F31°C | 84°F29°C | 77°F25°C | 67°F20°C | 61°F16°C |
| Avg low | 40°F4°C | 42°F6°C | 48°F9°C | 56°F13°C | 65°F18°C | 72°F22°C | 75°F24°C | 74°F23°C | 69°F21°C | 59°F15°C | 49°F9°C | 44°F7°C |
| Rain | 2.4 in61 mm | 3.3 in84 mm | 3.3 in84 mm | 3.2 in82 mm | 3.6 in92 mm | 5.5 in140 mm | 5.8 in147 mm | 6.7 in171 mm | 4.7 in119 mm | 4.1 in105 mm | 2.7 in69 mm | 3.6 in91 mm |
| Humidity | 80% | 80% | 78% | 75% | 73% | 76% | 76% | 79% | 80% | 78% | 79% | 82% |
| Cloud | 68% | 70% | 60% | 48% | 49% | 57% | 58% | 60% | 58% | 50% | 55% | 67% |
| Comfort | 73 | 76 | 85 | 85 | 80 | 59 | 53 | 50 | 66 | 80 | 88 | 76 |
Source: NASA POWER (public domain), 2001–2025 monthly averages on a ~50 km satellite and reanalysis grid, so coasts and valleys can differ from what's shown. The grid cell sits at about 13 m (43 ft), close to Charleston's own ~3 m. Precipitation includes snow as melted water; daylight is calculated from latitude. Check a forecast before you go.
The coldest season, with highs of 57–61°F (14–16°C) and lows down to 40°F (4°C). It's the driest season, with only about 9.3 in (236 mm) of rain, 19% of the year's total. February and December score well without being the very best (season average 75/100).
Temperatures climb through the season, from 67°F highs in March to 83°F by May. About 10.2 in (258 mm) of rain falls across these months, 21% of the year's total. Lows bottom out around 48°F (9°C). Comfort peaks here: March & April rank with the year's best, and the season averages 83/100.
The warmest stretch of the year, with highs of 88–90°F (31–32°C). It's the wettest season, with about 18.0 in (458 mm) of rain, 37% of the year's total. June – August feel humid, with humidity near 76%. It holds the toughest stretch on our comfort score (July & August), averaging 54/100.
Temperatures slide from 84°F highs in September to 67°F by November. About 11.5 in (293 mm) of rain falls across these months, 24% of the year's total. September & October feel humid, with humidity near 80%. Comfort peaks here: November ranks with the year's best, and the season averages 78/100.
By comfort score: 7 Great, 2 Good and 3 Fair. Great months: February – May and October – December. Tap a month for its own guide.
On the climate data, the best time to visit Charleston is March & April and November, scoring up to 88/100 with highs around 67°F (20°C) and 2.7 in (69 mm) of rain in November. February, May, October and December are good shoulder-season months. The toughest months are July & August, mainly because of rain.
August is the wettest month, averaging about 6.7 in (171 mm) of rain. January is the driest, with about 2.4 in (61 mm). The yearly total is around 49.0 in (1245 mm).
January is the coldest, with average lows of 40°F (4°C) and highs of 57°F (14°C). The warmest is July, with average highs of 90°F (32°C).
Yes: in June – August humidity averages 76% with warm temperatures, so it feels muggy. Summer highs peak around 90°F (32°C).
Not on average: even in January, the coldest month, lows average 40°F (4°C). Individual cold snaps can still dip lower.
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