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 start of May signals an increase in the average high-temperature, moving from a comfortable 65.1°F (18.4°C) in April to a warm 74.7°F (23.7°C). East Saint Louis in May experiences a low-temperature average of 57.7°F (14.3°C).Humidity
May and July, with an average relative humidity of 78%, are the most humid months.Rainfall
May is the month with the most rainfall. Rain falls for 17.5 days and accumulates 4.25" (108mm) of precipitation.Snowfall
April through October are months without snowfall in East Saint Louis.Daylight
In East Saint Louis, the average length of the day in May is 14h and 17min.On the first day of the month, sunrise is at 6:02 am and sunset at 7:53 pm. On the last day of May, sunrise is at 5:37 am and sunset at 8:18 pm CDT.
Sunshine
The average sunshine in May in East Saint Louis 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 unprotected exposure to Sun's UV rays for ordinary individuals.Note: The UV index of 6 during May translates into the following guidance:
Use measures and accept sun safety conventions. Guarding against skin and eye trauma is of high priority. Limit your direct sun exposure, especially between 10 a.m. and 4 p.m., when UV radiation is strongest. Shade structures might not provide complete sun protection. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are May temperatures?
What are the most humid months?
What is the average humidity in May?
What is the rainiest month?
How many days does it rain in May?
When it does not snow?
How many hours of daylight does East Saint Louis have in May?
What time are sunrise and sunset in May?
How many hours of sunshine does East Saint Louis have in May?
When is the highest UV index in East Saint Louis?
What is the UV index reading in May?
Average temperature in May
East Saint Louis, IL
- Average high temperature in May: 74.7°F
The warmest month (with the highest average high temperature) is July (86.4°F).
The month with the lowest average high temperature is January (37.8°F).
- Average low temperature in May: 57.7°F
The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (24.4°F).
Average pressure in May
East Saint Louis, IL
- Average pressure in May: 29.96"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
East Saint Louis, IL
- Average wind speed in May: 7.3mph
The windiest month (with the highest average wind speed) is January (9.3mph).
The calmest month (with the lowest average wind speed) is July (5.5mph).
Average humidity in May
East Saint Louis, IL
- Average humidity in May: 78%
The months with the highest relative humidity are May and July (78%).
The month with the lowest relative humidity is October (71%).
Average rainfall in May
East Saint Louis, IL
- Average rainfall in May: 4.25"
The wettest month (with the highest rainfall) is May (4.25").
The driest month (with the least rainfall) is February (1.89").
Average rainfall days in May
East Saint Louis, IL
- Average rainfall days in May: 17.5 days
The months with the highest number of rainy days are May and July (17.5 days).
The month with the least rainy days is January (8 days).
Average snowfall in May
East Saint Louis, IL
- Average snowfall in May: 0"
The month with the highest snowfall is February (2.64").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in May
East Saint Louis, IL
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is January (7.3 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
East Saint Louis, IL
- 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 months with the most sunshine are June and July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 36min).
Average sunshine days in May
East Saint Louis, IL
- Average sunshine days in May: 11.2 days
The month with the most sunshine days is December (18.8 days).
The month with the least sunshine days is May (11.2 days).
Average UV index in May
East Saint Louis, IL
- 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
East Saint Louis, IL
- 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
East Saint Louis, IL
- 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).
East Saint Louis, Illinois, USA
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