Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
As August shifts into September in Charleston, a minor alteration in temperatures is observed, with average highs reducing from a moderately hot 84.6°F (29.2°C) to a still warm 77.9°F (25.5°C). During September, an average low-temperature of 56.7°F (13.7°C) is observed.Humidity
In Charleston, the average relative humidity in September is 77%.Rainfall
The month with the least rainfall in Charleston, West Virginia, is September, when the rain falls for 13.9 days and typically collects 1.81" (46mm) of precipitation.Snowfall
June through September are months without snowfall in Charleston.Daylight
The average length of the day in September is 12h and 25min.On the first day of September in Charleston, West Virginia, sunrise is at 6:56 am and sunset at 7:55 pm. On the last day of the month, sunrise is at 7:22 am and sunset at 7:10 pm EDT.
Sunshine
In Charleston, the average sunshine in September is 8.3h.UV index
The average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.Note: A maximum daily UV index of 4 during September morphs into the following directions:
Stay alert. Light-skinned people could suffer burns in less than 30 minutes. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.
Frequently asked questions
What is the usual temperature for Charleston in September?
What is the average humidity in September in Charleston?
What is the driest month in Charleston?
How many days does it rain in September in Charleston?
When it does not snow in Charleston?
Does it snow in Charleston in September?
How many hours of daylight does Charleston have in September?
When is the sunrise / sunset in September in Charleston?
How long on average sun shines in September in Charleston?
What is the UV index reading in September in Charleston?
Average temperature in September
Charleston, WV
- Average high temperature in September: 77.9°F
The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is January (38.7°F).
- Average low temperature in September: 56.7°F
The month with the highest average low temperature is July (63.3°F).
The coldest month (with the lowest average low temperature) is January (25.3°F).
Average pressure in September
Charleston, WV
- Average pressure in September: 30.06"Hg
The month with the highest atmospheric pressure is November (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.98"Hg).
Average wind speed in September
Charleston, WV
- Average wind speed in September: 4.3mph
The windiest month (with the highest average wind speed) is February (6.6mph).
The calmest month (with the lowest average wind speed) is August (4mph).
Average humidity in September
Charleston, WV
- Average humidity in September: 77%
The months with the highest relative humidity are January and February (82%).
The months with the lowest relative humidity are June, July, August and November (76%).
Average rainfall in September
Charleston, WV
- Average rainfall in September: 1.81"
The wettest month (with the highest rainfall) is May (3.94").
The driest month (with the least rainfall) is September (1.81").
Average rainfall days in September
Charleston, WV
- Average rainfall days in September: 13.9 days
The month with the highest number of rainy days is May (20.1 days).
The month with the least rainy days is November (11 days).
Average snowfall in September
Charleston, WV
- Average snowfall in September: 0"
The month with the highest snowfall is January (5.51").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Charleston, WV
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (14.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Charleston, WV
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in September: 8h and 2min
The month with the most sunshine is August (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in September
Charleston, WV
- Average sunshine days in September: 13.5 days
The months with the most sunshine days are October and November (16.5 days).
The month with the least sunshine days is February (8.4 days).
Average UV index in September
Charleston, WV
- Average UV index in September: 4
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February and December (UV index 2).
Average cloud cover in September
Charleston, WV
- Average cloud cover in September: 37
The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is August (Cloud cover 33).
Average visibility in September
Charleston, WV
- Average visibility in September: 5mi
The months with the highest visibility are April and November (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September, October and December (5mi).
Charleston, West Virginia, USA
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