Climate Insights for South Charleston

The climate in South Charleston is temperate. The average annual temperature is 14°C and approximately 1376mm of precipitation falls per year. South Charleston receives a notable amount of rainfall throughout the year, including during its driest month. South Charleston is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: July, August, June. The coldest months are January, December, February, when temperatures can drop to -1°C. Snowfall occurs from January to December, with around 57cm accumulating over the season.

Temperatures in South Charleston vary considerably across the year, with a 31°C difference between the coldest and warmest months. The warmest month is July, when average highs reach 30°C and the mean temperature sits around 25°C. The coldest month is January, when overnight lows fall to -1°C and the daily average is 2°C. On average, daily temperatures fluctuate by about 10°C between overnight lows and afternoon highs. The sharpest temperature change occurs between October and November, with a 7°C shift in average temperatures.

South Charleston is a fairly wet location, receiving approximately 1376mm of precipitation annually, which averages out to around 115mm per month. The wettest month is May, averaging 155mm of rainfall. July and February also tend to see above-average precipitation. The driest month is November, with just 80mm. That's 75mm less than May, the wettest month. Rainfall is relatively evenly distributed throughout the year, so there is no pronounced dry or wet season to plan around. Snowfall is a regular feature from January to December, with around 57cm accumulating over the season. January typically sees the most snow at around 22cm.

South Charleston is relatively calm, with an average annual wind speed of 10km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is March, averaging 12km/h, though still comfortable for most outdoor activities. The calmest conditions occur in August, with average winds dropping to 7km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 5km/h gap between the calmest and windiest months. Wind tends to be stronger during winter months, driven by seasonal pressure systems. The seasonal averages break down to 12km/h in winter, 11km/h in spring, 8km/h in summer, 10km/h in autumn.

It is currently summer in South Charleston, which began on June 21, 2026. South Charleston is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in July at around 30°C, while the coldest stretch bottoms out in January near -1°C. Autumn is next, beginning on September 23, 2026 (7 days from now).

The best time to visit South Charleston is during September, when the weather is most comfortable for travellers. During these months, average temperatures hover around 21°C with modest rainfall averaging 92mm per month. By contrast, July can be uncomfortably hot with highs reaching 30°C, while January is the coldest period with lows dropping to -1°C. Despite being the best months overall, some rain is still likely. Pack a waterproof layer and plan a mix of indoor and outdoor activities.

The table below shows monthly climate averages for South Charleston based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Snow is measured in centimetres (cm) and reflects average monthly snowfall accumulation. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.