Charleston County Weather Forecast
Charleston County weather: 79°F, clear. Hourly forecast, 14-day outlook, UV, air quality and the best time to visit.
Will it rain in Charleston County?
No - rain is unlikely in Charleston County today.
Rain is very unlikely today - plans do not need a backup.
Over the next 7 days, about 0,5 in of precipitation is forecast, with the wettest days falling on Sun and Tue.
Rainfall over the next 7 days is close to normal for September (0,5 in against a typical 0,8 in).
16-day forecast for Charleston County
Daily highs and lows, precipitation and UV.
| Day | Conditions | High / Low | Precip | Wind | UV |
|---|---|---|---|---|---|
| Fri, Sep 18 | ⛅ Partly cloudy | 90° / 71° | 5% | 8 mph | 7 |
| Sat, Sep 19 | ☁️ Overcast | 92° / 73° | 19% | 10 mph | 7 |
| Sun, Sep 20 | 🌦️ Drizzle | 87° / 75° | 41% · 0,1 in | 9 mph | 6 |
| Mon, Sep 21 | ⛈️ Thunderstorm | 85° / 75° | 17% · 0,1 in | 9 mph | 7 |
| Tue, Sep 22 | ⛈️ Thunderstorm | 79° / 73° | 53% · 0,4 in | 9 mph | 3 |
| Wed, Sep 23 | ☁️ Overcast | 84° / 71° | 37% | 11 mph | 7 |
| Thu, Sep 24 | ☁️ Overcast | 81° / 67° | 14% | 11 mph | 6 |
| Fri, Sep 25 | ☁️ Overcast | 82° / 73° | 15% | 10 mph | 7 |
| Sat, Sep 26 | 🌦️ Light showers | 81° / 74° | 12% · 0,8 in | 15 mph | 7 |
| Sun, Sep 27 | 🌦️ Light showers | 75° / 72° | 11% · 0,8 in | 20 mph | 3 |
| Mon, Sep 28 | 🌦️ Light drizzle | 79° / 67° | 13% · 0,0 in | 15 mph | 5 |
| Tue, Sep 29 | ⛈️ Thunderstorm | 78° / 73° | 32% · 1,7 in | 11 mph | 4 |
| Wed, Sep 30 | 🌦️ Light drizzle | 85° / 74° | 26% · 0,0 in | 12 mph | 6 |
| Thu, Oct 1 | 🌧️ Showers | 79° / 74° | 39% · 0,9 in | 12 mph | 1 |
| Fri, Oct 2 | 🌧️ Showers | 75° / 73° | 29% · 1,1 in | 16 mph | 1 |
| Sat, Oct 3 | 🌦️ Drizzle | 79° / 75° | 35% · 0,4 in | 15 mph | 4 |
What this means for Charleston County
Today is warmer than average for September. The forecast high of 90°F is 7.7°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.
What to pack, what to skip
- Lightweight, light-coloured clothing and a refillable water bottle
- Sunglasses, a brimmed hat and SPF 30+
- A packable rain shell - 2 of the next 7 days carry a real chance of rain
- If your dates are flexible, avoid January, August and December - historically the least comfortable months here.
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 79°F (26°C) with clear. Humidity is 77% and wind is 4 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 4:57 AM.
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 19, 2026 at 4:57 AM local time. Live blocks refresh every 15 minutes; climate averages monthly.
