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 arrival of May brings a change in Coal Valley's weather, with average high-temperatures moving from April's mild 59°F (15°C) to a pleasant 70.3°F (21.3°C). The average low-temperature of 53.4°F (11.9°C) is witnessed during May.Humidity
The average relative humidity in May is 77%.Rainfall
May is the month with the most rainfall. Rain falls for 10.4 days and accumulates 0.94" (24mm) of precipitation.Snowfall
May through September are months without snowfall.Daylight
The average length of the day in May is 14h and 32min.On the first day of May, sunrise is at 5:57 am and sunset at 7:59 pm. On the last day of the month, sunrise is at 5:30 am and sunset at 8:28 pm CDT.
Sunshine
The average sunshine in May in Coal Valley, Illinois, is 8.6h.UV index
In Coal Valley, the average daily maximum UV index in May is 5. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for the average person.Note: An average maximum UV index of 5 in May leads to these recommendations:
Guard yourself - An obligation to protect skin and eyes from harm exists. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in May in Coal Valley?
What is the average humidity in May in Coal Valley?
What is the rainiest month in Coal Valley?
How much does it rain in Coal Valley in May?
When it does not snow in Coal Valley?
Does it snow in Coal Valley in May?
What is the average length of the day in May in Coal Valley?
When is the sunrise / sunset in May in Coal Valley?
How many hours of sunshine does Coal Valley have in May?
What is the UV index reading in May in Coal Valley?
Average temperature in May
Coal Valley, IL
- Average high temperature in May: 70.3°F
The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (28.2°F).
- Average low temperature in May: 53.4°F
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (16°F).
Average pressure in May
Coal Valley, IL
- Average pressure in May: 29.95"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in May
Coal Valley, IL
- Average wind speed in May: 9mph
The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest month (with the lowest average wind speed) is August (6.7mph).
Average humidity in May
Coal Valley, IL
- Average humidity in May: 77%
The months with the highest relative humidity are January and July (83%).
The month with the lowest relative humidity is October (71%).
Average rainfall in May
Coal Valley, IL
- Average rainfall in May: 0.94"
The wettest month (with the highest rainfall) is May (0.94").
The driest month (with the least rainfall) is December (0.24").
Average rainfall days in May
Coal Valley, IL
- Average rainfall days in May: 10.4 days
The month with the highest number of rainy days is May (10.4 days).
The month with the least rainy days is January (1.8 days).
Average snowfall in May
Coal Valley, IL
- Average snowfall in May: 0"
The month with the highest snowfall is January (1.06").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in May
Coal Valley, IL
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is January (5.5 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
Coal Valley, IL
- Average daylight in May: 14h and 3min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in May: 8h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days in May
Coal Valley, IL
- Average sunshine days in May: 16 days
The month with the most sunshine days is December (25.8 days).
The month with the least sunshine days is June (15.4 days).
Average UV index in May
Coal Valley, IL
- Average UV index in May: 5
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in May
Coal Valley, IL
- Average cloud cover in May: 43
The month with the most cloud cover is January (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in May
Coal Valley, 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).
Coal Valley, Illinois, USA
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