May weather forecastSummit, IL
May
Weather in May
May, the last month of the spring in Summit, is a comfortable month, with temperature in the range of an average high of 65.7°F (18.7°C) and an average low of 51.6°F (10.9°C).Temperature
Observing a rise in May, the average high-temperature goes from April's fresh 54.1°F (12.3°C) to a comfortable 65.7°F (18.7°C). The nights of May in Summit anticipate an average low-temperature of 51.6°F (10.9°C).Humidity
In May, the average relative humidity in Summit is 76%.Rainfall
May is the month with the most rainfall. Rain falls for 13 days and accumulates 1.38" (35mm) of precipitation.Snowfall
May through September are months without snowfall in Summit.Daylight
In Summit, Illinois, the average length of the day in May is 14h and 34min.On the first day of the month, sunrise is at 5:46 am and sunset at 7:50 pm. On the last day of May, in Summit, sunrise is at 5:18 am and sunset at 8:19 pm CDT.
Sunshine
In Summit, the average sunshine in May is 8.8h.UV index
In May, the average daily maximum UV index is 5. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for average individuals.Note: The daily high UV index of 5 during May translates into the following recommendations:
Act with care - The need to guard against sun damage is communicated. It's recommended to limit sun exposure when its radiation is at its peak during midday. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Summit, IL
- Average high temperature in May: 65.7°F
The warmest month (with the highest average high temperature) is July (80.8°F).
The month with the lowest average high temperature is January (29.5°F).
- Average low temperature in May: 51.6°F
The month with the highest average low temperature is July (67.1°F).
The coldest month (with the lowest average low temperature) is January (19.2°F).
Average pressure in May
Summit, IL
- Average pressure in May: 29.96"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in May
Summit, IL
- Average wind speed in May: 8.5mph
The windiest month (with the highest average wind speed) is January (10.9mph).
The calmest month (with the lowest average wind speed) is August (6.7mph).
Average humidity in May
Summit, IL
- Average humidity in May: 76%
The months with the highest relative humidity are January and February (82%).
The month with the lowest relative humidity is October (72%).
Average rainfall in May
Summit, IL
- Average rainfall in May: 1.38"
The wettest month (with the highest rainfall) is May (1.38").
The driest month (with the least rainfall) is December (0.43").
Average rainfall days in May
Summit, IL
- Average rainfall days in May: 13 days
The month with the highest number of rainy days is July (13.3 days).
The month with the least rainy days is February (4.1 days).
Average snowfall in May
Summit, IL
- Average snowfall in May: 0"
The month with the highest snowfall is February (1.38").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in May
Summit, IL
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is January (10.1 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
Summit, IL
- Average daylight in May: 14h and 36min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in May: 8h and 48min
The month with the most sunshine is August (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in May
Summit, IL
- Average sunshine days in May: 14.1 days
The month with the most sunshine days is November (21.3 days).
The month with the least sunshine days is June (12.3 days).
Average UV index in May
Summit, IL
- Average UV index in May: 5
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in May
Summit, IL
- Average cloud cover in May: 41
The month with the most cloud cover is January (Cloud cover 60).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility in May
Summit, 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).
