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

Temperature

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

Humidity

In May, the average relative humidity in Charleston, West Virginia, 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

Months with snowfall in Charleston are January through May, October through December. May is the last month it regularly snows in Charleston, West Virginia. During 0.3 snowfall days, 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 14.3h.

Sunshine

The average sunshine in Charleston 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 of 6 to 7 symbolizes a high health hazard from the exposure to the Sun's UV radiation for ordinary individuals.
Note: The average daily UV index of 6 transform into the following instructions:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. 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. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.

What is the temperature in May in Charleston?

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

How many days does it rain in May in Charleston?

In Charleston, West Virginia, in May, during 20.1 rainfall days, 3.94" (100mm) of precipitation is typically accumulated.

What is the rainiest month in Charleston?

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

What is the last month it snows in Charleston?

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

What is the average length of the day in May in Charleston?

In May, the average length of the day in Charleston is 14.3h.

How long on average sun shines in May in Charleston?

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

When is the highest UV index in Charleston?

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

What is the UV index reading in May in Charleston?

In May, the average daily maximum UV index in Charleston is 6. A UV Index estimate of 6 to 7 represents a high hazard to health from the exposure to the Sun's UV rays.
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).

Average pressure in May - Charleston, West VA
  • Average pressure in May: 30.01"

The month with the highest atmospheric pressure is November (30.16").
The month with the lowest atmospheric pressure is June (29.98").

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).

Average humidity in May - Charleston, West VA
  • Average humidity in May: 78%

Months with the highest relative humidity are January and February (82%).
Months with the lowest relative humidity are June, July, August and November (76%).

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").

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).

Average snowfall in May - Charleston, West VA
  • Average snowfall in May: 0.31"

The month with the highest snowfall is January (5.51").
Months with the least snowfall are June, July, August and September (0").

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).
Months with the least snowfall days are June, July, August and September (0 days).

Average daylight in May / Average sunshine in May - Charleston, West VA
  • Average daylight in May: 14.3h

The month with the longest days is June (Average daylight: 14.8h).
The month with the shortest days is December (Average daylight: 9.5h).

  • Average sunshine in May: 9h

The month with the most sunshine is August (Average sunshine: 10.2h).
The month with the least sunshine is January (Average sunshine: 3.7h).

Average sunshine days in May - Charleston, West VA
  • Average sunshine days in May: 9.5 days

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, West VA
  • Average UV index in May: 6

Months with the highest UV index are May, June, July and August (UV index 6).
Months with the lowest UV index are January, February and December (UV index 2).

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).

Average visibility in May - Charleston, West VA
  • Average visibility in May: 5mi

Months with the highest visibility are April and November (6mi).
Months with the lowest visibility are January, February, March, May, June, July, August, September, October and December (5mi).