Charleston, SC Weather & Climate Normals
What a normal year in Charleston actually looks like
On the 30-year record NOAA keeps for Charleston, SC, the comfort score comes out to 55/100, strongly seasonal: Comfortable weather is limited to a shorter window; summers, winters, or precipitation swing wide. Only 5 months a year land in the 55–75°F range this site treats as mild.
How much Charleston's weather actually swings
Average temperatures in Charleston run from 51°F in Jan up to 82°F in Jul, a 31.5°F seasonal swing, a middling gap by national standards.
Charleston, month by month
| Month | Avg high | Avg low | Precip |
|---|---|---|---|
| Jan | 58°F | 44°F | 2.56in |
| Feb | 60°F | 46°F | 2.56in |
| Mar | 66°F | 52°F | 3.03in |
| Apr | 72°F | 60°F | 2.96in |
| May | 79°F | 68°F | 2.58in |
| Jun | 84°F | 74°F | 4.85in |
| Jul | 88°F | 77°F | 5.08in |
| Aug | 86°F | 77°F | 6.11in |
| Sep | 83°F | 73°F | 5.25in |
| Oct | 76°F | 63°F | 4.07in |
| Nov | 67°F | 53°F | 2.3in |
| Dec | 61°F | 47°F | 2.91in |
If you're timing a visit, Mar, Apr, May, Oct, and Nov are Charleston's mildest stretch; if you're moving there, you should plan around Jul's heat and Jan's cold instead.
How wet Charleston actually gets
Charleston averages 44.26in of precipitation a year across roughly 102 days with measurable rain or snow; the nearest NOAA station does not record snowfall, so no snow figure is shown rather than guessed.
Charleston against the rest of the country
Out of 4876 cities scored here, Charleston comes in at 823; within SC alone it ranks 3 of 66. Population is about 157,665.
Checking the actual forecast
These figures come from Charleston City, SC US, the NOAA station 4.1 miles from Charleston, averaged over 30 years, not tomorrow's forecast.
More on how this is worked out
Why some cities show no snow or rain figure · What a 30-year climate normal actually is