Charleston County Weather Forecast
Charleston County weather: 70°F, clear. Hourly forecast, 14-day outlook, UV, air quality and the best time to visit.
Summary
Charleston County is a county in South Carolina. Charleston County is a county in the United States. It has a population of about 410.000.
Right now it is 70°F (21°C) in Charleston County with clear. It feels like 72°F. Today runs from 69°F to 83°F. Chance of precipitation is 2%. Sightseeing conditions score 9.5/10 - excellent - go now.
The best time to visit Charleston County is March, April, June, September and November. The climate is temperate. January, August and December tend to be the least comfortable months. July is the warmest month with average highs near 89°F, while January is the coldest with lows near 40°F.
The closest major airport is Hartsfield-Jackson Atlanta International Airport (ATL), about 267 mi away. Nearby highlights include Hunting Island State Park, Congaree National Park, Myrtle Beach and Chimney Rock State Park.
In plain terms. Today is about average for September. The forecast high of 83°F is in line with the 82°F typical for this month. The best window to be outside is roughly 7 AM to 10 AM, when temperature, rain chance and wind line up best. stargazing is the strongest bet in Charleston County today at 9.9/10. No weather-related travel disruption is expected today. Roads and airports should run normally.
Compiled from this page's own data: atlas facts plus live Open-Meteo readings.
Weather in Charleston County right now
Source: Open-Meteo. Updated 11:47 AM, Sep 17 local time.
See the Charleston County forecast by time range
Next 24 hours
Hour-by-hour temperature, precipitation chance and wind.
16-day forecast for Charleston County
Daily highs and lows, precipitation and UV.
| Day | Conditions | High / Low | Precip | Wind | UV |
|---|---|---|---|---|---|
| Thu, Sep 17 | ☁️ Overcast | 83° / 69° | 2% | 11 mph | 7 |
| Fri, Sep 18 | ☁️ Overcast | 88° / 70° | 5% | 9 mph | 7 |
| Sat, Sep 19 | 🌦️ Light drizzle | 85° / 75° | 37% · 0,0 in | 10 mph | 7 |
| Sun, Sep 20 | 🌦️ Drizzle | 84° / 77° | 29% · 0,1 in | 9 mph | 6 |
| Mon, Sep 21 | 🌧️ Heavy drizzle | 82° / 76° | 29% · 0,2 in | 13 mph | 7 |
| Tue, Sep 22 | 🌦️ Light drizzle | 86° / 73° | 49% · 0,0 in | 7 mph | 7 |
| Wed, Sep 23 | 🌦️ Light drizzle | 82° / 73° | 39% · 0,1 in | 12 mph | 5 |
| Thu, Sep 24 | ☁️ Overcast | 80° / 71° | 33% | 15 mph | 6 |
| Fri, Sep 25 | ⛅ Partly cloudy | 82° / 74° | 33% | 13 mph | 7 |
| Sat, Sep 26 | 🌤️ Mainly clear | 80° / 72° | 21% | 17 mph | 7 |
| Sun, Sep 27 | ☁️ Overcast | 77° / 71° | 12% | 18 mph | 7 |
| Mon, Sep 28 | ☁️ Overcast | 79° / 72° | 29% | 15 mph | 4 |
| Tue, Sep 29 | ⛈️ Thunderstorm | 78° / 74° | 35% · 2,4 in | 18 mph | 0 |
| Wed, Sep 30 | ⛈️ Thunderstorm | 83° / 77° | 29% · 1,0 in | 16 mph | 6 |
| Thu, Oct 1 | 🌦️ Light showers | 82° / 76° | 30% · 0,4 in | 11 mph | 4 |
| Fri, Oct 2 | ☀️ Clear sky | -- / -- | 23% | -- | — |
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° | 76° | 6,9 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).
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.
Air quality and pollen in Charleston County
Air quality: Open-Meteo (CAMS). US AQI scale.
Sun, twilight and moon
Golden and blue hour are the standard photographic approximation around sunrise and sunset.
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.
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 70°F (21°C) with clear. Humidity is 87% and wind is 8 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 11:47 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 17, 2026 at 11:47 AM local time. Live blocks refresh every 15 minutes; climate averages monthly.
