Charleston County Climate and Average Weather
Climate of Charleston County: average temperatures, rainfall and seasons month by month.
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° | 9,5 in | ★★★☆☆ |
| September | 83° | 71° | 4,3 in | ★★★★☆ |
| October | 76° | 61° | 3,6 in | ★★★★☆ |
| November | 68° | 53° | 1,9 in | ★★★★☆ |
| December | 60° | 46° | 4,7 in | ★★★☆☆ |
Climate type: Temperate. Source: Open-Meteo archive (ERA5).
Recent extremes in Charleston County
Highest and lowest readings observed in the last 3 years of reanalysis data - not all-time records.
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 | 50 in |
| Hunting Island State Park | 40 mi | 67°F | about the same | 51 in |
| Savannah | 83 mi | 67°F | about the same | 51 in |
| Congaree National Park | 86 mi | 65°F | 34°F cooler | 40 in |
| Myrtle Beach | 87 mi | 65°F | 34°F cooler | 49 in |
Best time to visit Charleston County
Go in March, April, June, October 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 this means for Charleston County
Today is about average for October. The forecast high of 75°F is in line with the 76°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
- 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.
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 55°F (13°C) in Charleston County with clear. It feels like 49°F. Today runs from 54°F to 75°F. Chance of precipitation is 0%. Sightseeing conditions score 9/10 - excellent - go now.
The best time to visit Charleston County is March, April, June, October 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 October. The forecast high of 75°F is in line with the 76°F typical for this month. The best window to be outside is roughly 6 PM to 9 PM, when temperature, rain chance and wind line up best. stargazing is the strongest bet in Charleston County today at 10/10. 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.
Quick facts about Charleston County
| Type | County |
|---|---|
| State | South Carolina |
| Country | United States |
| Continent | North America |
| Coordinates | 32°46′35.4″N 79°55′52″W (32.7765, -79.9311) |
| Population | 410.000 |
| Local time | 9:08 PM (UTC-04:00) |
| Best months | March, April, June, October and November |
| Climate | Temperate |
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.
Explore Charleston County
Every topic we hold for this place, and the same topic for the places around it.
Climate 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 55°F (13°C) with clear. Humidity is 73% and wind is 12 mph.
When is the best time to visit Charleston County?
March, April, June, October 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 9:08 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 October 28, 2026 at 9:08 PM local time. Live blocks refresh every 15 minutes; climate averages monthly.
