CheckWeather US›Charleston
Charleston weather
Loading live data…The weather map: all three models at once
NWS, American, European side by side around Charleston and nearby towns.Live rain radar →Loading the three model maps…
Next 14 hours
consensus of the three models7-day forecast
where the models agree, and where they splitCharleston, SC is at its warmest in Jul (average highs near 88°F) and coldest in Jan (lows around 46°F), with roughly 51 in of precipitation across the year. Below, compare what NWS, American, European forecast for Charleston right now, and see exactly where they disagree.
Charleston climate by month
average daytime high and overnight low across a typical yearJan
60°
46°
Feb
64°
49°
Mar
68°
54°
Apr
73°
59°
May
79°
66°
Jun
84°
72°
Jul
88°
77°
Aug
87°
76°
Sep
82°
70°
Oct
76°
61°
Nov
68°
55°
Dec
60°
47°
Which forecast is most accurate in the US?
CheckWeather Score — graded against the weather that actually happened
The CheckWeather Score blends temperature, wind and rain accuracy — each measured against ERA5 (the recorded weather) over the last 30 days across 40 cities. Lower error means a higher score. The apps you know (AccuWeather, Apple Weather, The Weather Channel) are built on these models.
Common questions
What's the weather in Charleston today?
On this page we show what NWS, American, European each forecast for Charleston today, side by side and updated live. When all three agree the forecast is reliable; when they split, we flag it so you know the day is genuinely less certain.
Will it rain in Charleston today or tomorrow?
Check the hourly strip and 7-day forecast above. We compare rain from NWS, American, European for Charleston and flag the days where the models disagree on whether showers actually arrive, which is exactly when a single app can catch you out.
Which forecast is most accurate for Charleston?
No single model is always right. NWS, American, European each run their own physics, so we line all three up: when they agree the Charleston forecast is reliable, and when they split you should expect surprises. See our tested US accuracy scoreboard for how the models compare.
What is the warmest month in Charleston?
July is typically the warmest month in Charleston, with average highs around 88°F.
How cold does Charleston get?
The coldest month in Charleston is January, when overnight lows average about 46°F.
How much rain does Charleston get?
Charleston sees roughly 51 in of precipitation a year, with August usually the wettest month.
The forecasts Americans check
The two biggest apps keep their model a secret, so we can't show their numbers, only link you to them. The National Weather Service is public, so its data sits right in the comparison above.