Charleston County Weather Forecast
Charleston County weather: 71°F, fog. Hourly forecast, 14-day outlook, UV, air quality and the best time to visit.
Risk assessment for Charleston County
Derived from the current forecast window - not an official warning.
Peak gusts of 26 mph and 2 thunderstorm days in the next 16 days.
Wettest single day forecast at 0,3 in, 0,9 in across the window. Flash flooding risk rises sharply above 50 mm in a day.
16-day forecast for Charleston County
Daily highs and lows, precipitation and UV.
| Day | Conditions | High / Low | Precip | Wind | UV |
|---|---|---|---|---|---|
| Fri, Sep 18 | 🌥️ Fog | 91° / 70° | 6% | 8 mph | 7 |
| Sat, Sep 19 | 🌦️ Drizzle | 87° / 73° | 37% · 0,1 in | 10 mph | 7 |
| Sun, Sep 20 | ⛈️ Thunderstorm | 85° / 74° | 37% · 0,2 in | 9 mph | 7 |
| Mon, Sep 21 | 🌧️ Heavy drizzle | 85° / 74° | 21% · 0,1 in | 9 mph | 7 |
| Tue, Sep 22 | ⛈️ Thunderstorm | 84° / 74° | 53% · 0,1 in | 9 mph | 6 |
| Wed, Sep 23 | 🌦️ Light drizzle | 85° / 76° | 27% · 0,0 in | 12 mph | 7 |
| Thu, Sep 24 | 🌦️ Light drizzle | 83° / 70° | 24% · 0,0 in | 10 mph | 6 |
| Fri, Sep 25 | 🌧️ Heavy drizzle | 79° / 71° | 26% · 0,3 in | 11 mph | 4 |
| Sat, Sep 26 | 🌦️ Light drizzle | 78° / 66° | 17% · 0,0 in | 17 mph | 6 |
| Sun, Sep 27 | ☁️ Overcast | 80° / 63° | 12% | 15 mph | 7 |
| Mon, Sep 28 | ☁️ Overcast | 80° / 63° | 12% | 12 mph | 7 |
| Tue, Sep 29 | ⛅ Partly cloudy | 79° / 65° | 32% | 10 mph | 7 |
| Wed, Sep 30 | ☁️ Overcast | 79° / 70° | 35% | 10 mph | 6 |
| Thu, Oct 1 | 🌦️ Light drizzle | 79° / 73° | 27% · 0,0 in | 14 mph | 6 |
| Fri, Oct 2 | 🌦️ Light drizzle | 75° / 69° | 30% · 0,1 in | 11 mph | 2 |
| Sat, Oct 3 | ☀️ Clear sky | -- / -- | 26% | -- | — |
What this means for Charleston County
Today is warmer than average for September. The forecast high of 91°F is 8.5°F above the 82°F typical for this month.
Rain is very unlikely today - plans do not need a backup.
No weather-related travel disruption is expected today. Roads and airports should run normally.
Northern Hemisphere, so peak summer falls in June to August.
The gap between the warmest and coldest month averages 67°F.
See the Charleston County forecast by time range
Charleston County weather - more answers
Explore Charleston County
Every topic we hold for this place, and the same topic for the places around it.
Weather for related places
Frequently asked questions
Where is Charleston County?
Charleston County is a county in South Carolina. Its coordinates are 32.7765, -79.9311. It lies in North America.
What is the weather like in Charleston County right now?
It is currently 71°F (22°C) with fog. Humidity is 96% and wind is 3 mph.
When is the best time to visit Charleston County?
March, April, June, September and November offer the most comfortable conditions in Charleston County, which has a temperate climate. January, August and December are usually the hardest months for outdoor plans.
What time zone is Charleston County in?
Charleston County observes America/New_York (UTC-04:00). The local time is 2:03 PM.
How many people live in Charleston County?
Charleston County has a population of approximately 410.000.
What is the nearest airport to Charleston County?
The closest airports are Hartsfield-Jackson Atlanta International Airport (ATL), 267 mi away.
What are the top things to do in Charleston County?
Popular options include Hunting Island State Park, Congaree National Park, Myrtle Beach and Chimney Rock State Park.
Related articles
Data sources and methodology
| Place data | USPOTUS Atlas dataset (us-counties) - coordinates, hierarchy and facts. |
|---|---|
| Forecast and observations | Open-Meteo (ECMWF and national models). |
| Air quality and pollen | Copernicus CAMS via Open-Meteo. US AQI scale. |
| Climate averages | ERA5 reanalysis via the Open-Meteo archive, aggregated over 3 years. |
| Official alerts | US National Weather Service. |
| Method | Scores, comparisons and advice on this page are computed from the inputs above. Distances are straight-line. Nothing is estimated where data is missing - the block is simply not shown. |
Last updated September 18, 2026 at 2:03 PM local time. Live blocks refresh every 15 minutes; climate averages monthly.
