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
The onset of May brings a temperature shift, with the average high-temperature moving from an enjoyable 65.3°F (18.5°C) in April to a moderately hot 74.8°F (23.8°C). During the nights in May, Saint Charles experiences a consistent average temperature of 57.6°F (14.2°C).Humidity
With an average relative humidity of 77%, May is the most humid month.Rainfall
May is the month with the most rainfall. Rain falls for 16 days and accumulates 3.31" (84mm) of precipitation.Snowfall
In Saint Charles, Missouri, snow does not fall in April through October.Daylight
The average length of the day in May in Saint Charles, Missouri, is 14h and 19min.On the first day of the month, sunrise is at 6:03 am and sunset at 7:54 pm. On the last day of May, sunrise is at 5:38 am and sunset at 8:20 pm CDT.
Sunshine
The average sunshine in May in Saint Charles is 9.5h.UV index
The months with the highest UV index are May through August, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV rays for average individuals.Note: The maximum daily UV index of 6 during May translates into the following directions:
Take precautions and utilize sun safety practices. Protection against skin and eye damage is required. The Sun's UV radiation is most intense from 10 a.m. to 4 p.m. Try to avoid direct sun exposure during these hours. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses.
Frequently asked questions
What is the temperature in May in Saint Charles?
What is the most humid month in Saint Charles?
What is the average humidity in May in Saint Charles?
What is the rainiest month in Saint Charles?
How much does it rain in Saint Charles in May?
When it does not snow in Saint Charles?
What is the average length of the day in May in Saint Charles?
When are sunrise and sunset in May in Saint Charles?
How many hours of sunshine does Saint Charles have in May?
When is the highest UV index in Saint Charles?
What is the UV index reading in May in Saint Charles?
Average temperature in May
Saint Charles, MO
- Average high temperature in May: 74.8°F
The warmest month (with the highest average high temperature) is July (86.7°F).
The month with the lowest average high temperature is January (37.2°F).
- Average low temperature in May: 57.6°F
The month with the highest average low temperature is July (68.9°F).
The coldest month (with the lowest average low temperature) is January (24.3°F).
Average pressure in May
Saint Charles, MO
- Average pressure in May: 29.95"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in May
Saint Charles, MO
- Average wind speed in May: 7.3mph
The windiest month (with the highest average wind speed) is January (9.3mph).
The calmest months (with the lowest average wind speed) are July and August (5.6mph).
Average humidity in May
Saint Charles, MO
- Average humidity in May: 77%
The month with the highest relative humidity is May (77%).
The month with the lowest relative humidity is October (70%).
Average rainfall in May
Saint Charles, MO
- Average rainfall in May: 3.31"
The wettest month (with the highest rainfall) is May (3.31").
The driest month (with the least rainfall) is February (1.42").
Average rainfall days in May
Saint Charles, MO
- Average rainfall days in May: 16 days
The month with the highest number of rainy days is July (16.3 days).
The months with the least rainy days are February and December (7.3 days).
Average snowfall in May
Saint Charles, MO
- Average snowfall in May: 0"
The month with the highest snowfall is February (2.05").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in May
Saint Charles, MO
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is January (6.8 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
Saint Charles, MO
- Average daylight in May: 14h and 2min
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 30min).
- Average sunshine in May: 9h and 3min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 4h and 36min).
Average sunshine days in May
Saint Charles, MO
- Average sunshine days in May: 12.1 days
The month with the most sunshine days is October (19.2 days).
The month with the least sunshine days is July (11.4 days).
Average UV index in May
Saint Charles, 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, February and December (UV index 2).
Average cloud cover in May
Saint Charles, MO
- Average cloud cover in May: 37
The month with the most cloud cover is January (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility in May
Saint Charles, 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).
Saint Charles, Missouri, USA
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