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
As April transitions into May, Chester sees a rise in the average high-temperature, moving from a comfortable 66.4°F (19.1°C) to a warm 75.7°F (24.3°C). An average low-temperature of 57.9°F (14.4°C) is noted during the nights in May.Humidity
The most humid month in Chester is May, with an average relative humidity of 79%.Rainfall
In Chester, Illinois, in May, during 17.3 rainfall days, 3.86" (98mm) of precipitation is typically accumulated. Throughout the year, there are 156.4 rainfall days, and 34.25" (870mm) of precipitation is accumulated.Snowfall
May through September are months without snowfall in Chester.Daylight
The average length of the day in May is 14h and 14min.On the first day of the month, sunrise is at 6:02 am and sunset at 7:50 pm. On the last day of May, in Chester, sunrise is at 5:38 am and sunset at 8:15 pm CDT.
Sunshine
In Chester, Illinois, the average sunshine in May is 9.3h.UV index
The months with the highest UV index in Chester, Illinois, are May through August, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV radiation for ordinary individuals.Note: The maximum daily UV index of 6 during May translates into the following directions:
Inhibit overexposure. Warding off sun damage is of utmost importance. Remember that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. Make an effort to avoid direct sun exposure during these hours. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes.
Frequently asked questions
What is the average May temperature in Chester?
What is the most humid month in Chester?
What is the average humidity in May in Chester?
How much does it rain in Chester in May?
When it does not snow in Chester?
Does it snow in Chester in May?
What is the average length of the day in May in Chester?
When is the sunrise / sunset in May in Chester?
How many hours of sunshine does Chester have in May?
When is the highest UV index in Chester?
What is the UV index intensity in May in Chester?
Average temperature in May
Chester, IL
- Average high temperature in May: 75.7°F
The warmest month (with the highest average high temperature) is July (87.4°F).
The month with the lowest average high temperature is January (39.6°F).
- Average low temperature in May: 57.9°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 (25.7°F).
Average pressure in May
Chester, 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 (29.93"Hg).
Average wind speed in May
Chester, IL
- Average wind speed in May: 7.4mph
The windiest month (with the highest average wind speed) is January (9.4mph).
The calmest month (with the lowest average wind speed) is August (5.5mph).
Average humidity in May
Chester, IL
- Average humidity in May: 79%
The month with the highest relative humidity is May (79%).
The month with the lowest relative humidity is October (71%).
Average rainfall in May
Chester, IL
- Average rainfall in May: 3.86"
The wettest month (with the highest rainfall) is April (4.13").
The driest month (with the least rainfall) is September (1.97").
Average rainfall days in May
Chester, IL
- Average rainfall days in May: 17.3 days
The month with the highest number of rainy days is July (17.8 days).
The month with the least rainy days is January (7.9 days).
Average snowfall in May
Chester, IL
- Average snowfall in May: 0"
The month with the highest snowfall is February (2.56").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in May
Chester, IL
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is February (5.2 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
Chester, IL
- Average daylight in May: 14h and 1min
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 36min).
- Average sunshine in May: 9h and 2min
The months with the most sunshine are June and July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 42min).
Average sunshine days in May
Chester, IL
- Average sunshine days in May: 11.3 days
The month with the most sunshine days is October (18.9 days).
The month with the least sunshine days is July (9.8 days).
Average UV index in May
Chester, 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
Chester, IL
- Average cloud cover in May: 37
The months with the most cloud cover are January and February (Cloud cover 48).
The month with the least cloud cover is June (Cloud cover 27).
Average visibility in May
Chester, 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).
Chester, Illinois, USA
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