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 introduces a marginal temperature uplift, with average high-temperatures adjusting from April's comfortable 67.8°F (19.9°C) to a warm 76.6°F (24.8°C). During the month of May, Charleston's nighttime temperature lowers to an average of 60.3°F (15.7°C).Humidity
March and May, with an average relative humidity of 78%, are the most humid months in Charleston.Rainfall
In Charleston, during May, the rain falls for 16.4 days and regularly aggregates up to 3.7" (94mm) of precipitation. In Charleston, during the entire year, the rain falls for 153 days and collects up to 33.9" (861mm) of precipitation.Snowfall
May through October are months without snowfall.Daylight
The average length of the day in May is 14h and 10min.On the first day of May in Charleston, sunrise is at 6:02 am and sunset at 7:46 pm. On the last day of the month, sunrise is at 5:39 am and sunset at 8:10 pm CDT.
Sunshine
In May, the average sunshine is 9.4h.UV index
The months with the highest UV index are May through August, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high health hazard from exposure to the Sun's UV rays for the ordinary person.Note: In May, the average maximum UV index of 6 translates into the following recommendations:
Adhere to precautions and respect sun safety doctrines. Avoiding sunburn is vital. Make an effort to avoid direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation, and note that objects like parasols or canopies might not offer full sun protection. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Charleston in May?
What is the most humid month?
What is the average humidity in May?
How much does it rain in May?
When it does not snow?
Does it snow in May?
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?
What are the months with the highest UV index?
What is the UV index intensity in May?
Average temperature in May
Charleston, MO
- Average high temperature in May: 76.6°F
The warmest month (with the highest average high temperature) is July (88.2°F).
The month with the lowest average high temperature is January (41.5°F).
- Average low temperature in May: 60.3°F
The month with the highest average low temperature is July (70.2°F).
The coldest month (with the lowest average low temperature) is January (28.8°F).
Average pressure in May
Charleston, MO
- Average pressure in May: 29.97"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in May
Charleston, MO
- Average wind speed in May: 7.8mph
The windiest months (with the highest average wind speed) are January, February and March (9.3mph).
The calmest month (with the lowest average wind speed) is August (5.7mph).
Average humidity in May
Charleston, MO
- Average humidity in May: 78%
The months with the highest relative humidity are March and May (78%).
The month with the lowest relative humidity is October (69%).
Average rainfall in May
Charleston, MO
- Average rainfall in May: 3.7"
The wettest month (with the highest rainfall) is April (3.9").
The driest month (with the least rainfall) is September (1.22").
Average rainfall days in May
Charleston, MO
- Average rainfall days in May: 16.4 days
The month with the highest number of rainy days is May (16.4 days).
The month with the least rainy days is January (9.4 days).
Average snowfall in May
Charleston, MO
- Average snowfall in May: 0"
The month with the highest snowfall is February (1.69").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in May
Charleston, MO
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is February (3.6 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in May /
Average sunshine in May
Charleston, MO
- Average daylight in May: 14h and 1min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in May: 9h and 2min
The months with the most sunshine are June and July (Average sunshine: 10h and 42min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
Average sunshine days in May
Charleston, MO
- Average sunshine days in May: 12.1 days
The month with the most sunshine days is October (19.5 days).
The month with the least sunshine days is May (12.1 days).
Average UV index in May
Charleston, MO
- 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 and December (UV index 2).
Average cloud cover in May
Charleston, MO
- Average cloud cover in May: 37
The months with the most cloud cover are February and March (Cloud cover 48).
The month with the least cloud cover is June (Cloud cover 25).
Average visibility in May
Charleston, MO
- Average visibility in May: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Charleston, Missouri, USA
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