May weather forecastCharleston, TN
May
Weather in May
May, the last month of the spring in Charleston, is a warm month, with temperature in the range of an average high of 77.9°F (25.5°C) and an average low of 56.8°F (13.8°C).Temperature
The beginning of May marks a minor shift in the average high-temperature, moving from April's agreeable 69.4°F (20.8°C) to a warm 77.9°F (25.5°C). May brings an average low-temperature of 56.8°F (13.8°C) to Charleston.Humidity
In Charleston, the average relative humidity in May is 77%.Rainfall
In Charleston, during May, the rain falls for 14.5 days and regularly aggregates up to 2.05" (52mm) of precipitation. In Charleston, during the entire year, the rain falls for 148 days and collects up to 23.9" (607mm) of precipitation.Snowfall
April through October are months without snowfall in Charleston.Daylight
The average length of the day in May in Charleston is 14h and 2min.On the first day of May in Charleston, Tennessee, sunrise is at 6:46 am and sunset at 8:25 pm. On the last day of the month, sunrise is at 6:25 am and sunset at 8:48 pm EDT.
Sunshine
The average sunshine in May is 9.9h.UV index
May through August, with an average maximum UV index of 6, are months with the highest UV index in Charleston, Tennessee. A UV Index value of 6 to 7 symbolizes a high health hazard from unprotected exposure to Sun's UV rays for average individuals.Note: In May, a daily maximum UV index of 6 leads to the following instructions:
Guard oneself from overexposure. Defence against sun injury is vital. The Sun's UV radiation is most potent between the hours of 10 a.m. and 4 p.m. Try to avoid direct sunlight during this time. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Charleston, TN
- Average high temperature in May: 77.9°F
The warmest month (with the highest average high temperature) is July (87.8°F).
The month with the lowest average high temperature is January (46.4°F).
- Average low temperature in May: 56.8°F
The month with the highest average low temperature is July (66.4°F).
The coldest month (with the lowest average low temperature) is January (30.9°F).
Average pressure in May
Charleston, TN
- Average pressure in May: 30.02"Hg
The months with the highest atmospheric pressure are January and November (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.98"Hg).
Average wind speed in May
Charleston, TN
- Average wind speed in May: 5.1mph
The windiest month (with the highest average wind speed) is February (6.6mph).
The calmest month (with the lowest average wind speed) is August (3.8mph).
Average humidity in May
Charleston, TN
- Average humidity in May: 77%
The month with the highest relative humidity is December (80%).
The months with the lowest relative humidity are June, July, August, September, October and November (75%).
Average rainfall in May
Charleston, TN
- Average rainfall in May: 2.05"
The wettest month (with the highest rainfall) is July (2.64").
The driest month (with the least rainfall) is September (1.3").
Average rainfall days in May
Charleston, TN
- Average rainfall days in May: 14.5 days
The month with the highest number of rainy days is July (17 days).
The month with the least rainy days is November (7.3 days).
Average snowfall in May
Charleston, TN
- Average snowfall in May: 0"
The month with the highest snowfall is February (0.75").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in May
Charleston, TN
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is February (1.7 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Charleston, TN
- Average daylight in May: 14h and 0min
The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 48min).
- Average sunshine in May: 9h and 54min
The month with the most sunshine is June (Average sunshine: 10h and 36min).
The month with the least sunshine is December (Average sunshine: 5h and 6min).
Average sunshine days in May
Charleston, TN
- Average sunshine days in May: 14.1 days
The months with the most sunshine days are October and November (21.2 days).
The month with the least sunshine days is July (11.6 days).
Average UV index in May
Charleston, TN
- 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, TN
- Average cloud cover in May: 34
The month with the most cloud cover is February (Cloud cover 50).
The month with the least cloud cover is June (Cloud cover 29).
Average visibility in May
Charleston, TN
- Average visibility in May: 5mi
The months with the highest visibility are February, March, April, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, May and December (5mi).
