North Charleston Weather by Month

Average temperatures, rainfall and humidity for North Charleston, United States, month by month, built from OpenWeather’s historical records. Use it to see what a typical North Charleston month looks like before you travel — then check the live North Charleston forecast for the days ahead.

Warmest month

July

32°C average high

Coolest month

January

5°C average low

Wettest month

September

179 mm of rain

Driest month

May

54 mm of rain

Average temperature and rainfall in North Charleston by month

Averages of the daily highs and lows recorded in each month, with total rainfall, mean humidity and mean wind speed.

Month	Avg high	Avg low	Record low / high	Rainfall	Humidity	Wind
January	15°C	5°C	-9°C / 27°C	65 mm	75%	12 km/h
February	18°C	8°C	-8°C / 29°C	57 mm	76%	13 km/h
March	21°C	10°C	-3°C / 30°C	68 mm	71%	14 km/h
April	24°C	14°C	2°C / 31°C	56 mm	73%	14 km/h
May	28°C	19°C	8°C / 38°C	54 mm	76%	13 km/h
June	30°C	22°C	14°C / 37°C	68 mm	79%	12 km/h
July	32°C	24°C	18°C / 37°C	85 mm	81%	11 km/h
August	31°C	24°C	18°C / 37°C	98 mm	83%	10 km/h
September	29°C	21°C	12°C / 36°C	179 mm	83%	11 km/h
October	25°C	16°C	2°C / 33°C	68 mm	79%	11 km/h
November	20°C	10°C	-2°C / 28°C	65 mm	78%	12 km/h
December	17°C	8°C	-8°C / 27°C	78 mm	80%	11 km/h

Best time to visit North Charleston

The most comfortable time to visit North Charleston is generally April to May and October, balancing mild daytime temperatures against the driest stretch of the year. The city has a moderate seasonal swing and rain concentrates around September, totalling about 941 mm a year.

Travellers who prefer heat should aim for July, when highs average 32°C. September is the month to avoid if rain would spoil your plans — it averages 179 mm, roughly 3× the rainfall of the driest month (May).

Source: OpenWeather historical and statistical weather data. Values are long-term averages, not a forecast — see the North Charleston forecast for what is happening now.