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
With the transition into May, Charleston experiences an increase in average high-temperatures, moving up from a chilly 48°F (8.9°C) in April to a refreshing 62.2°F (16.8°C). In the month of May, the temperature generally rests at an average low of 42.3°F (5.7°C).Humidity
May is the least humid month, with an average relative humidity of 76%.Rainfall
In Charleston, during May, the rain falls for 16.7 days and regularly aggregates up to 2.72" (69mm) of precipitation. In Charleston, during the entire year, the rain falls for 154.3 days and collects up to 32.68" (830mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. May is the last month it regularly snows. During 0.2 snowfall days, in May, Charleston aggregates 0.28" (7mm) of snow. Throughout the year, there are 69.5 snowfall days, and 49.96" (1269mm) of snow is accumulated.Daylight
In Charleston, the average length of the day in May is 14h and 53min.On the first day of May, sunrise is at 5:23 am and sunset at 7:42 pm. On the last day of the month, sunrise is at 4:52 am and sunset at 8:15 pm EDT.
Sunshine
The average sunshine in May is 7.8h.UV index
The average daily maximum UV index in May is 4. A UV Index estimate of 3 to 5 represents a medium health hazard from exposure to the Sun's UV radiation for average individuals.Note: The maximum daily UV index of 4 in May converts into the following recommendations:
Exercise prevention - Precautions against solar damage are endorsed. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears. Guard yourself! Snow reflection can almost double the UV radiation from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Charleston in May?
What is the least humid month?
What is the average humidity in May?
How many days does it rain in May?
What is the last month it snows in Charleston?
How many hours of daylight does Charleston have in May?
What time are sunrise and sunset in May in Charleston?
How long on average sun shines in May?
How high is the UV index in May?
Average temperature in May
Charleston, ME
- Average high temperature in May: 62.2°F
The warmest month (with the highest average high temperature) is July (77.2°F).
The month with the lowest average high temperature is January (23.9°F).
- Average low temperature in May: 42.3°F
The month with the highest average low temperature is July (55.9°F).
The coldest month (with the lowest average low temperature) is January (10.8°F).
Average pressure in May
Charleston, ME
- Average pressure in May: 29.98"Hg
The month with the highest atmospheric pressure is September (30.04"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in May
Charleston, ME
- Average wind speed in May: 6.6mph
The windiest month (with the highest average wind speed) is March (7.5mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).
Average humidity in May
Charleston, ME
- Average humidity in May: 76%
The month with the highest relative humidity is February (88%).
The month with the lowest relative humidity is May (76%).
Average rainfall in May
Charleston, ME
- Average rainfall in May: 2.72"
The wettest month (with the highest rainfall) is April (3.54").
The driest month (with the least rainfall) is July (1.89").
Average rainfall days in May
Charleston, ME
- Average rainfall days in May: 16.7 days
The months with the highest number of rainy days are May and July (16.7 days).
The month with the least rainy days is February (6.8 days).
Average snowfall in May
Charleston, ME
- Average snowfall in May: 0.28"
The month with the highest snowfall is February (11.26").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Charleston, ME
- Average snowfall days in May: 0.2 days
The month with the highest number of snowfall days is February (15.8 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, ME
- Average daylight in May: 14h and 5min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in May: 7h and 5min
The month with the most sunshine is August (Average sunshine: 9h and 54min).
The month with the least sunshine is February (Average sunshine: 3h and 48min).
Average sunshine days in May
Charleston, ME
- Average sunshine days in May: 12.1 days
The month with the most sunshine days is September (16.4 days).
The month with the least sunshine days is April (10.7 days).
Average UV index in May
Charleston, ME
- Average UV index in May: 4
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).
Average cloud cover in May
Charleston, ME
- Average cloud cover in May: 51
The month with the most cloud cover is February (Cloud cover 59).
The months with the least cloud cover are August and September (Cloud cover 40).
Average visibility in May
Charleston, ME
- Average visibility in May: 5mi
The months with the highest visibility are April, May, June, July, August, September, October, November and December (5mi).
The months with the lowest visibility are January, February and March (4mi).
Charleston, Maine, USA
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