Monthly Weather in Charleston, United States
What is the average monthly temperature in Charleston?
The average monthly temperature in Charleston, South Carolina, United States ranges from 5.2°C (41.3°F) in January to 23.7°C (74.7°F) in July. Charleston temperature by month is given in the table below.
| Month | Celsius | Fahrenheit |
|---|---|---|
| January | 5.2°C | 41.4°F |
| February | 7.5°C | 45.5°F |
| March | 8.0°C | 46.4°F |
| April | 13.9°C | 57.0°F |
| May | 16.6°C | 61.9°F |
| June | 20.1°C | 68.2°F |
| July | 23.7°C | 74.7°F |
| August | 22.7°C | 72.9°F |
| September | 19.5°C | 67.1°F |
| October | 14.1°C | 57.4°F |
| November | 7.5°C | 45.5°F |
| December | 6.0°C | 42.8°F |
What is the hottest month in Charleston?
The hottest months in Charleston are July, August and June. During July the average temperature outside is 23.7°C (74.7°F), in August it is 22.7°C (72.9°F) and during June the air temperature is around 20.1°C (68.2°F).
What is the coldest month in Charleston?
The coldest months in Charleston are January, December and February. In January the average air temperature drops to 5.2°C (41.4°F), in December air temperature is 6°C (42.8°F) and during February it is 7.5°C (45.5°F).
How much does it rain on average in Charleston?
On average it rains for 12 month(s) in Charleston, United States with an average of 15.3 days of rain per month. In total Charleston has 184 rainy days in a year.
When does it rain the most in Charleston?
In Charleston it rains the most during the following months.
- February - on average 3.89mm (0.15 inches) of rainfall per day.
- July - on average 3.51mm (0.14 inches) of rainfall per day.
- August - on average 3.31mm (0.13 inches) of rainfall per day.
- January - on average 3.13mm (0.12 inches) of rainfall per day.
- September - on average 2.97mm (0.12 inches) of rainfall per day.
- May - on average 2.95mm (0.12 inches) of rainfall per day.
Does it snow in Charleston?
Yes, it snows in Charleston. The following months have the most amount of snow.
- January. Charleston has 0.26mm (0.01 inches) of snowfall and 0.06 mm (0 inches) of snow on the ground in January.
- February. Charleston has 0.11mm (0 inches) of snowfall and 0.02 mm (0 inches) of snow on the ground in February.
- December. Charleston has 0.01mm (0 inches) of snowfall and 0.01 mm (0 inches) of snow on the ground in December.
When is it windy in Charleston?
The windiest months in Charleston, United States are March, February and April. In March the average windspeed is 23.6 km/h (14.7 mph), during February the windspeed is 22.9 km/h (14.2 mph) and in April the windspeed is 21.6 km/h (13.4 mph).
What are the least windy months in Charleston?
The least windy months in Charleston are September, August and October. In September the average windspeed is 12.3 km/h (7.6 mph), during August the windspeed is 15.4 km/h (9.6 mph) and in October the windspeed is 15.5 km/h (9.6 mph).
When is it cloudy in Charleston?
The cloudiest months in Charleston, United States are January, February and October. On average in January 79% of sky is covered by clouds, in February 68.7% is covered by clouds and in October clouds cover about 66.9% of sky.
When does Charleston have the clearest sky?
Charleston has the clearest sky in November, April and September. In November 46.7% of sky is covered by clouds, in April clouds cover around 57.1% and during September clouds cover about 58.9% of sky.
What is the average daylight duration in Charleston?
The average daylight duration in Charleston is 12 hours 11 minutes 23 seconds.
Which months have the most daylight in Charleston?
The longest days in Charleston are during June, July and May.
- June - 14 hours 47 minutes 30 seconds of daylight.
- July - 14 hours 31 minutes 47 seconds of daylight.
- May - 14 hours 15 minutes 40 seconds of daylight.
Which months have the least daylight in Charleston?
The shortest days in Charleston are during December, January and November.
- December - 9 hours 32 minutes 39 seconds of daylight.
- January - 9 hours 50 minutes 43 seconds of daylight.
- November - 10 hours 6 minutes 29 seconds of daylight.
What are the humidity levels in Charleston throughout the year?
Humidity levels in Charleston, United States range from 56.5% in April to 84% in September.
What are the pressure levels in Charleston throughout the year?
Pressure levels in Charleston change from 1011.4 mb (millibars) in June to 1021 mb in November.
What is the visibility in Charleston throughout the year?
Visibility in Charleston changes from lowest 12.3 km (7.6 miles) in September to highest 15.4 km (9.6 miles) in April.
What are the UV levels in Charleston throughout the year?
UV levels change in Charleston from 2 in January to 6.9 in July.
Which months have the highest UV levels in Charleston throughout the year?
In Charleston, United States the highest UV index is during July, August and April. During July the average UV index is 6.9, in August UV level is 5.9 and in April UV index is around 5.8.
Which months have the lowest UV levels in Charleston throughout the year?
The lowest UV levels in Charleston are in January, December and November. In January the average UV index is around 2, in December UV index is 2.3 and during November UV level is 3.3.