May weather forecast
Charleston, West VA

The calm Kanawha River in front of Charleston, West Virginia, reflecting the city in its water
The calm Kanawha River in front of Charleston, West Virginia, reflecting the city in its water

Weather in May

May, the last month of the spring in Charleston, is a warm month, with an average temperature fluctuating between 74.8°F (23.8°C) and 54.1°F (12.3°C).

Temperature

In May, the average high-temperature increases from a comfortable 64.8°F (18.2°C) in April to a moderately hot 74.8°F (23.8°C). In May, the average low-temperature is 54.1°F (12.3°C).

Humidity

In May, the average relative humidity 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, Charleston aggregates 0.31" (8mm) of snow. In Charleston, West Virginia, during the entire year, snow falls for 46.8 days and aggregates up to 22.01" (559mm) of snow.

Daylight

In May, the average length of the day in Charleston, West Virginia, is 14h and 16min.
On the first day of the month, sunrise is at 6:29 am and sunset at 8:17 pm. On the last day of May, in Charleston, West Virginia, sunrise is at 6:04 am and sunset at 8:43 pm EDT.

Sunshine

In Charleston, West Virginia, the average sunshine in May is 9h.

UV index

The months with the highest UV index in Charleston are May through August, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV radiation for the ordinary person.
Note: The average daily UV index of 6 in May transform into the following instructions:
Take precautions and utilize sun safety practices. Protection against skin and eye damage is required. 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. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the temperature in May in Charleston?

In Charleston, in May, the average high-temperature is 74.8°F (23.8°C), and the average low-temperature is 54.1°F (12.3°C).

What is the average humidity in May in Charleston?

In May, the average relative humidity in Charleston is 78%.

What is the rainiest month in Charleston?

The month with the most rainfall in Charleston is May, when the rain falls for 20.1 days and typically aggregates up to 3.94" (100mm) of precipitation.

How many days does it rain in May in Charleston?

In May, in Charleston, the rain falls for 20.1 days. Throughout May, 3.94" (100mm) of precipitation is accumulated.

What is the last month it snows in Charleston?

May is the last month it regularly snows in Charleston. During 0.3 snowfall days, in May, Charleston aggregates 0.31" (8mm) of snow.

How many hours of daylight does Charleston have in May?

The average day length in May in Charleston, West Virginia, is 14h and 16min.

When is the sunrise / sunset in May in Charleston?

On the first day of May in Charleston, West Virginia, sunrise is at 6:29 am and sunset at 8:17 pm. On the last day of the month, sunrise is at 6:04 am and sunset at 8:43 pm EDT.

How long on average sun shines in May in Charleston?

In May, the average sunshine duration in Charleston, West Virginia, is 9h.

When is the highest UV index in Charleston?

May through August, with an average maximum UV index of 6, are months with the highest UV index.

What is the UV index intensity in May in Charleston?

In May, the average daily maximum UV index in Charleston, West Virginia, is 6. A UV Index estimate of 6 to 7 represents a high health risk from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Charleston, West VA

Average temperature in May - Charleston, West VA
  • 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).

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Average pressure in May
Charleston, West VA

Average pressure in May - Charleston, West VA
  • 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).

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Average wind speed in May
Charleston, West VA

Average wind speed in May - Charleston, West VA
  • 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).

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Average humidity in May
Charleston, West VA

Average humidity in May - Charleston, West VA
  • 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%).

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Average rainfall in May
Charleston, West VA

Average rainfall in May - Charleston, West VA
  • 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").

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Average rainfall days in May
Charleston, West VA

Average rainfall days in May - Charleston, West VA
  • 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).

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Average snowfall in May
Charleston, West VA

Average snowfall in May - Charleston, West VA
  • 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").

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Average snowfall days in May
Charleston, West VA

Average snowfall days in May - Charleston, West VA
  • 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).

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Average daylight in May /
Average sunshine in May
Charleston, West VA

Average daylight in May / Average sunshine in May - Charleston, West VA
  • Average daylight in May: 14h and 16min

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 33min).

  • 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).

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Average sunshine days in May
Charleston, West VA

Average sunshine days in May - Charleston, West VA
  • 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).

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Average UV index in May
Charleston, West VA

Average UV index in May - Charleston, West VA
  • 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).

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Average cloud cover in May
Charleston, West VA

Average cloud cover in May - Charleston, West VA
  • 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).

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Average visibility in May
Charleston, West VA

Average visibility in May - Charleston, West VA
  • 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).

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