Charleston County Weather Forecast
Charleston County weather: 73°F, heavy rain. Hourly forecast, 14-day outlook, UV, air quality and the best time to visit.
Charleston County weather in August
Weather map for Charleston County
Animated model layers. Pick a layer to load it.
Animated layers by Windy. For pin-level detail and nearby places, see the interactive map below.
Climate in Charleston County month by month
Average high, average low and total rainfall, based on three years of reanalysis data.
| Month | Avg high | Avg low | Rainfall | Rating |
|---|---|---|---|---|
| January | 56° | 40° | 3,1 in | ★★★☆☆ |
| February | 61° | 46° | 3,3 in | ★★★☆☆ |
| March | 69° | 53° | 3,3 in | ★★★★☆ |
| April | 75° | 60° | 2,2 in | ★★★★☆ |
| May | 81° | 68° | 4,5 in | ★★★★☆ |
| June | 86° | 74° | 4,1 in | ★★★★☆ |
| July | 89° | 78° | 5,0 in | ★★★☆☆ |
| August | 86° | 75° | 6,7 in | ★★★☆☆ |
| September | 82° | 70° | 3,4 in | ★★★★☆ |
| October | 75° | 61° | 4,1 in | ★★★★☆ |
| November | 68° | 54° | 1,9 in | ★★★★☆ |
| December | 60° | 46° | 4,7 in | ★★★☆☆ |
Climate type: Temperate. Source: Open-Meteo archive (ERA5).
Best time to visit Charleston County
Go in March, April, June, September and November. These months score highest on comfortable temperatures, low rainfall and useful daylight.
Hardest months: January, August and December - expect the least comfortable mix of heat, cold or rain.
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 - 5 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.
How Charleston County compares with nearby places
Annual averages, and the difference against Charleston County.
| Place | Distance | Avg temp | vs here | Annual rain |
|---|---|---|---|---|
| Charleston | 0 mi | 67°F | about the same | 46 in |
| Hunting Island State Park | 40 mi | 67°F | about the same | 47 in |
| Savannah | 83 mi | 67°F | about the same | 48 in |
| Congaree National Park | 86 mi | 65°F | 34°F cooler | 39 in |
| Myrtle Beach | 87 mi | 65°F | 34°F cooler | 48 in |
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 73°F (23°C) with heavy rain. Humidity is 94% and wind is 7 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 8:57 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 August 23, 2026 at 8:57 AM local time. Live blocks refresh every 15 minutes; climate averages monthly.
