Contents
- Weather in May
- Frequently asked questions
- Average temperature in May
- Average pressure in May
- Average wind speed in May
- Average humidity in May
- Average rainfall in May
- Average rainfall days in May
- Average snowfall in May
- Average snowfall days in May
- Average daylight in May
- Average sunshine in May
- Average sunshine days in May
- Average UV index in May
- Average cloud cover in May
- Average visibility in May
Weather in May
Temperature
May signals a shift in the average high-temperature, moving from April's comfortable 64.8°F (18.2°C) to a moderately hot 74.8°F (23.8°C). Charleston records an average low of 54.1°F (12.3°C) throughout the nights in May.Humidity
The average relative humidity in May is 78%.Rainfall
The month with the most rainfall is May, when the rain falls for 20.1 days and typically aggregates up to 3.94" (100mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. May is the last month it regularly snows. During 0.3 snowfall days, in May, Charleston aggregates 0.31" (8mm) of snow. In Charleston, during the entire year, snow falls for 46.8 days and aggregates up to 22.01" (559mm) of snow.Daylight
The average length of the day in May is 14h and 16min.On the first day of the month, sunrise is at 6:28 am and sunset at 8:18 pm. On the last day of May, in Charleston, sunrise is at 6:04 am and sunset at 8:44 pm EDT.
Sunshine
In Charleston, the average sunshine in May is 9h.UV index
May through August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high health hazard from unsafe exposure to UV radiation for the average person.Note: The maximum daily UV index of 6 in May converts into the following recommendations:
Sustain precautions and conform to sun safety norms. Preventing sunburn is necessary. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly. Remember to consider! The UV radiation from the Sun can be intensified nearly twice by the reflection of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are May temperatures?
What is the average humidity in May?
What is the wettest month?
How many days does it rain in May in Charleston?
What is the last month it snows?
What is the average length of the day in May?
When is the sunrise / sunset in May?
How long on average sun shines in May?
What is the month with the highest UV index?
What is the UV index reading in May?
Average temperature in May
Charleston, WV
- Average high temperature in May: 74.8°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 May: 54.1°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 May
Charleston, WV
- Average pressure in May: 30.01"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 May
Charleston, WV
- Average wind speed in May: 5.5mph
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 May
Charleston, WV
- Average humidity in May: 78%
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 May
Charleston, WV
- Average rainfall in May: 3.94"
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 May
Charleston, WV
- Average rainfall days in May: 20.1 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 May
Charleston, WV
- Average snowfall in May: 0.31"
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 May
Charleston, WV
- Average snowfall days in May: 0.3 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 May /
Average sunshine in May
Charleston, WV
- Average daylight in May: 14h 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 May: 9h and 0min
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 May
Charleston, WV
- Average sunshine days in May: 9.5 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 May
Charleston, WV
- Average UV index in May: 6
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 May
Charleston, WV
- Average cloud cover in May: 44
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 May
Charleston, WV
- Average visibility in May: 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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