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Forecast confidence: High · models disagree by 1°F

Charleston weather

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Mostly clear,much the same tomorrow

NWS, the American and the European model agree on a high near 72° in Charleston today. Tomorrow: partly cloudy, around 73°, with a 0% chance of rain.

72°56°
73°57°
72°56°
73°54°
72°56°
73°59°
Todaymodels agreeTomorrowmodels agreeMondaymodels agreeTuesdaymodels agreeWednesdaymodels agreeThursdaysplit ±5°
NWSNational Blend (NBM)
64°
Clear
Feels 60° · Wind 17 mph · Humidity 85%
AmericanNOAA GFS
60°
Clear
Feels 55° · Wind 16 mph · Humidity 79%
EuropeanECMWF
61°
Clear
Feels 57° · Wind 12 mph · Humidity 73%

Latest for Charleston: NWS (National Blend (NBM)): 64° Clear · American (NOAA GFS): 60° Clear · European (ECMWF): 61° Clear.

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Charleston weather alerts and warnings

active National Weather Service watches, warnings and advisories

Checking the National Weather Service for active alerts covering Charleston…

Charleston weather in numbers

measured normals and 10 years of recorded weather

Charleston swings 44°F across the year, from 87°F highs in July to 43°F lows in January, and August is usually the wettest month in a year that brings about 50 in of precipitation. Over 10 years of recorded weather it averages 172 days a year at 77°F or above, 56 of them at 86°F or above, 5 frost nights, and rain on 137 days.

Warmest month
July
87°F average high
Coldest month
January
43°F average low
Wettest month
August
50 in a year
Comfortable
4 months
February, March, April and October
Residents
133,000
share this forecast
Most accurate here
European
94/100 CheckWeather Score
Warm days
172 days
a year at 77°F or above
Frost nights
5 nights
a year below 32°F
Rain days
137 days
a year with 0.04 in or more

Day counts are from the ERA5 reanalysis for Charleston’s grid square, 2016 to 2025, counted the same way for every city so the numbers compare. A reanalysis square is an area, not a weather station, so it is good for counting days and not for a single day’s record.

The weather map: all three models at once

NWS, American, European side by side around Charleston and nearby towns.Live rain radar →
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Charleston hourly forecast: next 14 hours

consensus of the three models

Rain in the next 24 hours, model by model

each model's own hourly precipitation, side by side

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Charleston 10-day forecast, out to 14 days

where the models agree, and where they split
Today
Mostly clear
72° 56°
models agree
Tomorrow
Partly cloudy
73° 57°
models agree
Mon
Clear
72° 56°
models agree
Tue
Clear
73° 54°
models agree
Wed
Cloudy
72° 56°
models agree
Thu
Cloudy
73° 59°
±5°
Fri
Mostly clear
75° 58°
models agree
Sat
Cloudy
75° 60°
models agree
Sun
Cloudy
73° 62°
±8°
Mon
Cloudy
74° 62°
±8°
Tue
Light drizzle
73° 60°
±7°
Wed
Partly cloudy
70° 55°
±4°
Thu
Cloudy
73° 56°
models agree

Charleston, South Carolina (SC) is at its warmest in Jul (average highs near 87°F) and coldest in Jan (lows around 43°F), with roughly 50 in of precipitation across the year. Below, compare what NWS, American, European forecast for Charleston right now, and see exactly where they disagree.

We grade every model against the weather that actually happened, so you can see which forecast model is most accurate in United States before you trust any single number.

Charleston climate by month

average daytime high and overnight low across a typical year (1991-2020)
Jan
57°
43°
Feb
60°
45°
Mar
65°
51°
Apr
71°
57°
May
79°
66°
Jun
83°
71°
Jul
87°
76°
Aug
86°
75°
Sep
82°
70°
Oct
76°
61°
Nov
65°
52°
Dec
60°
47°

Source: 1991-2020 averages, ERA5 for this place adjusted with NASA POWER.

How Charleston's weather has changed since 1995

30 years of daily data, 1995-2024, shown as change
+1.2°F

Around Charleston, 2015-2024 averaged 1.2°F warmer than 1995-2004. 6 of the 10 warmest years since 1995 fall in the last ten, and the warmest was 2019.

1995: −1.2°F vs the 30-year average1996: −1.6°F vs the 30-year average1997: −1.1°F vs the 30-year average1998: +1.3°F vs the 30-year average1999: −0.2°F vs the 30-year average2000: −1.2°F vs the 30-year average2001: +0.6°F vs the 30-year average2002: +0.9°F vs the 30-year average2003: −1.1°F vs the 30-year average2004: −0.3°F vs the 30-year average2005: −0.5°F vs the 30-year average2006: +0.4°F vs the 30-year average2007: +0.9°F vs the 30-year average2008: −0.9°F vs the 30-year average2009: −0.9°F vs the 30-year average2010: −1.8°F vs the 30-year average2011: +0.6°F vs the 30-year average2012: +0.6°F vs the 30-year average2013: −1.2°F vs the 30-year average2014: −1.4°F vs the 30-year average2015: +0.7°F vs the 30-year average2016: +0.4°F vs the 30-year average2017: +1.1°F vs the 30-year average2018: +0.6°F vs the 30-year average2019: +1.5°F vs the 30-year average2020: +1.1°F vs the 30-year average2021: +0.2°F vs the 30-year average2022: +0.6°F vs the 30-year average2023: +1.3°F vs the 30-year average2024: +1.1°F vs the 30-year average
1995each stripe is one year2024
cooler than averagearound averagewarmer than average

Days above 95°F

2 fewer days a year

2015-2024 against 1995-2004. Within the normal year-to-year swing

1995: −4 vs the 30-year average1996: −2 vs the 30-year average1997: −10 vs the 30-year average1998: +14 vs the 30-year average1999: +9 vs the 30-year average2000: +6 vs the 30-year average2001: −5 vs the 30-year average2002: +10 vs the 30-year average2003: −12 vs the 30-year average2004: +2 vs the 30-year average2005: −5 vs the 30-year average2006: +6 vs the 30-year average2007: +9 vs the 30-year average2008: −1 vs the 30-year average2009: −7 vs the 30-year average2010: +3 vs the 30-year average2011: +14 vs the 30-year average2012: −3 vs the 30-year average2013: −12 vs the 30-year average2014: −7 vs the 30-year average2015: +7 vs the 30-year average2016: +5 vs the 30-year average2017: −11 vs the 30-year average2018: −3 vs the 30-year average2019: +11 vs the 30-year average2020: −3 vs the 30-year average2021: −12 vs the 30-year average2022: −3 vs the 30-year average2023: −3 vs the 30-year average2024: +2 vs the 30-year average

Frost nights

6 fewer nights a year

2015-2024 against 1995-2004, below 32°F. Within the normal year-to-year swing

1995: +9 vs the 30-year average1996: +11 vs the 30-year average1997: −3 vs the 30-year average1998: −9 vs the 30-year average1999: −1 vs the 30-year average2000: +14 vs the 30-year average2001: −3 vs the 30-year average2002: +1 vs the 30-year average2003: −2 vs the 30-year average2004: +4 vs the 30-year average2005: −3 vs the 30-year average2006: −9 vs the 30-year average2007: −6 vs the 30-year average2008: +1 vs the 30-year average2009: +5 vs the 30-year average2010: +29 vs the 30-year average2011: −3 vs the 30-year average2012: −8 vs the 30-year average2013: −6 vs the 30-year average2014: +8 vs the 30-year average2015: +4 vs the 30-year average2016: +0 vs the 30-year average2017: −6 vs the 30-year average2018: +6 vs the 30-year average2019: −8 vs the 30-year average2020: −8 vs the 30-year average2021: −10 vs the 30-year average2022: +0 vs the 30-year average2023: −12 vs the 30-year average2024: −4 vs the 30-year average

Average wind

−4%

2015-2024 against 1995-2004

1995: +2% vs the 30-year average1996: +5% vs the 30-year average1997: +2% vs the 30-year average1998: +2% vs the 30-year average1999: +5% vs the 30-year average2000: +2% vs the 30-year average2001: +2% vs the 30-year average2002: +2% vs the 30-year average2003: −2% vs the 30-year average2004: +5% vs the 30-year average2005: +2% vs the 30-year average2006: +2% vs the 30-year average2007: −2% vs the 30-year average2008: +2% vs the 30-year average2009: −2% vs the 30-year average2010: −2% vs the 30-year average2011: +2% vs the 30-year average2012: −2% vs the 30-year average2013: −2% vs the 30-year average2014: −5% vs the 30-year average2015: −2% vs the 30-year average2016: −2% vs the 30-year average2017: −2% vs the 30-year average2018: +2% vs the 30-year average2019: −2% vs the 30-year average2020: −2% vs the 30-year average2021: −5% vs the 30-year average2022: −2% vs the 30-year average2023: −5% vs the 30-year average2024: +2% vs the 30-year average

Bars: each year against the area's 30-year average. Dashed lines: the average of the first and the last ten years.

See the numbers year by year
YearTemp vs averageDays >95°F vs avgFrost nights vs avgWind vs avg
1995−1.2°F−4+9+2%
1996−1.6°F−2+11+5%
1997−1.1°F−10−3+2%
1998+1.3°F+14−9+2%
1999−0.2°F+9−1+5%
2000−1.2°F+6+14+2%
2001+0.6°F−5−3+2%
2002+0.9°F+10+1+2%
2003−1.1°F−12−2−2%
2004−0.3°F+2+4+5%
2005−0.5°F−5−3+2%
2006+0.4°F+6−9+2%
2007+0.9°F+9−6−2%
2008−0.9°F−1+1+2%
2009−0.9°F−7+5−2%
2010−1.8°F+3+29−2%
2011+0.6°F+14−3+2%
2012+0.6°F−3−8−2%
2013−1.2°F−12−6−2%
2014−1.4°F−7+8−5%
2015+0.7°F+7+4−2%
2016+0.4°F+5+0−2%
2017+1.1°F−11−6−2%
2018+0.6°F−3+6+2%
2019+1.5°F+11−8−2%
2020+1.1°F−3−8−2%
2021+0.2°F−12−10−5%
2022+0.6°F−3+0−2%
2023+1.3°F−3−12−5%
2024+1.1°F+2−4+2%

Source: NASA POWER daily data from the MERRA-2 reanalysis, 1995-2024. Each value describes a grid square of about 50 km around Charleston, not a weather station, and a square that takes in sea or a large lake runs milder than the city itself. That is why this section shows change against the square's own 30-year average rather than counts you could compare with a local station. Rain and snow are left out because their long-term record in this dataset is not consistent over time. "Within the normal year-to-year swing" means the change is smaller than the usual differences between single years.

Which forecast is most accurate in Charleston?

CheckWeather Score, graded against the weather that actually happened
ProviderCheckWeather-scoreTempWindRainRun by
European logo
European ★ Best
94
/100rank #1
92±0.8°F94±1.7 mph9597% hitECMWF - European Centre for Medium-Range Weather ForecastsReading, United Kingdom
American logo
American
77
/100rank #2
86±1.4°F96±1.3 mph5374% hitNOAA / NCEP (United States)College Park, Maryland, USA

The CheckWeather Score blends temperature, wind and rain accuracy, each measured against ERA5 (the recorded weather) over the last 30 days across 1999 cities. Lower error means a higher score. See which forecast model is most accurate in United States, how we measure forecast accuracy, or which model each weather app uses.

What do you think of the forecasts?

your vote counts

The accuracy above is the measured record. This is your opinion: which forecast service do you trust most in United States? Give each 1 to 5 stars.

NWSNational Blend (NBM)
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AmericanNOAA GFS
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EuropeanECMWF
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One vote per service. Anonymous: we store no personal data, only a one-way hash of your connection for a day to stop double votes.

Where the models disagree

temperature and rain, judged separately
DayTemperatureRain
Today±1°72° to 73°±1%1% to 2% chance
Tomorrow±2°72° to 74°models agree0% to 0% chance
Mon±3°72° to 74°models agree0% to 0% chance
Tue±3°72° to 75°models agree0% to 0% chance
Wed±4°71° to 75°±3%5% to 8% chance

The models often agree on temperature and still split on rain, and rain is usually what decides whether a plan survives. A wide rain range means the shower is genuinely uncertain, not that the forecast is wrong.

Sunrise and sunset in Charleston

today, local time
Sunrise
07:30
Sunset
18:36
Daylight
11h 6m

Common questions

What's the weather in Charleston today?
Saturday, October 24: NWS, the American and the European model agree on a high near 72° in Charleston today. Tomorrow: partly cloudy, around 73°, with a 0% chance of rain. The forecast on this page refreshes live.
Will it rain in Charleston today or tomorrow?
Rain looks unlikely in Charleston on Sunday, October 25: no model gives more than 0% (NWS 0%, American 0%, European 0%). On Saturday, October 24 the highest chance of rain from any model is 2%. The hourly strip and the model-by-model rain panel above update live.
Which forecast is most accurate for Charleston?
Over the last 30 days, the European model has been the most accurate for Charleston (CheckWeather Score 94/100), ahead of the American at 77. We grade every model against the recorded weather. See the US accuracy scoreboard for the full method.
What is the warmest month in Charleston?
July is typically the warmest month in Charleston, with average highs around 87°F.
How cold does Charleston get?
The coldest month in Charleston is January, when overnight lows average about 43°F.
How much rain does Charleston get?
Charleston sees roughly 50 in of precipitation a year, with August usually the wettest month.
Is Charleston getting warmer?
Yes. In NASA's reanalysis for the area around Charleston, 2015-2024 averaged 1.2°F warmer than 1995-2004.

Nearby

James IslandMount PleasantNorth CharlestonHanahanGoose CreekLadsonSangareeSummerville

More US weather

Which forecast is most accurate in United States?US rain radarNWS vs American vs European: models comparedHow we measure forecast accuracyHow accurate is a 7-day forecast?South Carolina weather todayAll US citiesHoliday weather abroadEmbed Charleston on your siteThe national forecast models, explained: NBM, UKMO, GEM and ACCESS