Climate Overview
The climate in Charleston Municipal Airport is warm and mild. The average annual temperature is 18°C and approximately 1384mm of precipitation falls per year. Charleston Municipal Airport receives a notable amount of rainfall throughout the year, including during its driest month. Charleston Municipal Airport 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, February, December, when temperatures can drop to 3°C. Light snow can occur between January and February.
Temperature
Temperatures in Charleston Municipal Airport vary considerably across the year, with a 30°C difference between the coldest and warmest months. The warmest month is July, when average highs reach 33°C and the mean temperature sits around 28°C. January is the coolest month, with minimum temperatures around 3°C and an average of 7°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.
Precipitation
Charleston Municipal Airport is a fairly wet location, receiving approximately 1384mm of precipitation annually, which averages out to around 115mm per month. The wettest month is March, averaging 178mm of rainfall. February and April also tend to see above-average precipitation. The driest month is September, with just 68mm. That's 110mm less than March, the wettest month. Precipitation varies noticeably between seasons, with the first half (January to June) of the year generally seeing more rainfall. Light snowfall can occur between January and February, totalling around 6cm annually. February is the snowiest month with approximately 3cm.
Wind
Charleston Municipal Airport is mildly breezy, with an average annual wind speed of 16km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is February, averaging 19km/h, though still comfortable for most outdoor activities. The calmest conditions occur in July, with average winds dropping to 13km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 6km/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 18km/h in winter, 18km/h in spring, 13km/h in summer, 15km/h in autumn.
Seasons
92 days until Summer
It is currently spring in Charleston Municipal Airport, which began on March 20, 2026. Charleston Municipal Airport 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 33°C, while the coldest stretch bottoms out in January near 3°C. Summer is next, beginning on June 21, 2026 — 92 days from now.
Spring
Temperatures range from 9 to 28°C. Rainfall is heavy, totalling around 429mm across the season with a monthly average of 143mm. Winds are moderate at around 18km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.
Summer
Temperatures range from 22 to 33°C. Precipitation is moderate at around 275mm for the season, averaging 92mm per month. Winds are generally light, averaging 13km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.
Autumn
Temperatures range from 8 to 31°C. Precipitation is moderate at around 247mm for the season, averaging 82mm per month. Winds are generally light, averaging 15km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from 3 to 15°C. Rainfall is heavy, totalling around 432mm across the season with a monthly average of 144mm. Expect around 6cm of snow accumulation during this period. Winds are moderate at around 18km/h. A light jacket or sweater is usually sufficient, though cooler evenings may call for an extra layer.
Best Time to Visit
The best time to visit Charleston Municipal Airport is during October, when the weather is most comfortable for travellers. During these months, average temperatures hover around 19°C with modest rainfall averaging 78mm per month. By contrast, July can be uncomfortably hot with highs reaching 33°C, while January is the coldest period with lows dropping to 3°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.
Monthly Climate Data
The table below shows monthly climate averages for Charleston Municipal Airport 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.