Charleston County Weather Forecast
Charleston County weather: 81°F, clear. 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 30 mph and 4 thunderstorm days in the next 16 days.
Wettest single day forecast at 0,5 in, 2,2 in across the window. Flash flooding risk rises sharply above 50 mm in a day.
Active alerts for Charleston County
Heat Advisory issued August 21 at 2:04AM EDT until August 21 at 8:00PM EDT by NWS Charleston SC
Issued by NWS Charleston SC
16-day forecast for Charleston County
Daily highs and lows, precipitation and UV.
| Day | Conditions | High / Low | Precip | Wind | UV |
|---|---|---|---|---|---|
| Thu, Aug 20 | 🌤️ Mainly clear | 92° / 80° | 14% | 11 mph | 7 |
| Fri, Aug 21 | ☁️ Overcast | 93° / 77° | 21% | 18 mph | 8 |
| Sat, Aug 22 | ⛈️ Thunderstorm with hail | 89° / 77° | 64% · 0,2 in | 13 mph | 7 |
| Sun, Aug 23 | 🌦️ Light drizzle | 95° / 73° | 42% · 0,0 in | 12 mph | 8 |
| Mon, Aug 24 | 🌦️ Light showers | 95° / 79° | 21% · 0,2 in | 11 mph | 8 |
| Tue, Aug 25 | 🌦️ Drizzle | 92° / 77° | 22% · 0,1 in | 15 mph | 6 |
| Wed, Aug 26 | ⛈️ Thunderstorm | 95° / 76° | 30% · 0,2 in | 14 mph | 8 |
| Thu, Aug 27 | 🌦️ Light showers | 94° / 76° | 35% · 0,3 in | 10 mph | 7 |
| Fri, Aug 28 | ⛈️ Thunderstorm | 94° / 74° | 40% · 0,2 in | 11 mph | 8 |
| Sat, Aug 29 | 🌦️ Drizzle | 90° / 79° | 30% · 0,1 in | 12 mph | 8 |
| Sun, Aug 30 | 🌦️ Drizzle | 91° / 79° | 23% · 0,2 in | 12 mph | 8 |
| Mon, Aug 31 | 🌧️ Showers | 93° / 77° | 23% · 0,5 in | 17 mph | 7 |
| Tue, Sep 1 | ⛈️ Thunderstorm | 90° / 78° | 21% · 0,3 in | 9 mph | 8 |
| Wed, Sep 2 | 🌦️ Light drizzle | 89° / 78° | 32% · 0,0 in | 11 mph | 8 |
| Thu, Sep 3 | 🌤️ Mainly clear | 94° / 78° | 35% | 13 mph | 8 |
| Fri, Sep 4 | ☀️ Clear sky | -- / -- | 36% | -- | — |
What this means for Charleston County
Today is slightly warmer than average for August. The forecast high of 92°F is 6.7°F above the 86°F typical for this month.
A 14% chance means most of the area stays dry; a passing shower is possible but short.
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
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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 81°F (27°C) with clear. Humidity is 82% and wind is 1 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 2:08 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 August 21, 2026 at 2:08 PM local time. Live blocks refresh every 15 minutes; climate averages monthly.
