May weather forecastBlue Island, IL
May
Weather in May
The last month of the spring, May, is a comfortable month in Blue Island, Illinois, with an average temperature fluctuating between 66.4°F (19.1°C) and 51.8°F (11°C).Temperature
The shift from April to May is marked by an increase in the average high-temperature, moving from a cool 55.2°F (12.9°C) to an enjoyable 66.4°F (19.1°C). Blue Island witnesses an average low-temperature of 51.8°F (11°C) throughout the month of May.Humidity
The average relative humidity in May is 76%.Rainfall
May is the month with the most rainfall in Blue Island, Illinois. Rain falls for 17.7 days and accumulates 3.07" (78mm) of precipitation.Snowfall
In Blue Island, snow does not fall in May through September.Daylight
In May, the average length of the day in Blue Island, Illinois, is 14h and 33min.On the first day of the month, sunrise is at 5:46 am and sunset at 7:49 pm. On the last day of May, in Blue Island, Illinois, sunrise is at 5:18 am and sunset at 8:18 pm CDT.
Sunshine
In May, the average sunshine in Blue Island is 8.9h.UV index
In May, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV radiation for ordinary individuals.Note: The UV index of 5 during May translates into the following guidance:
Adopt protective measures - Requirement to safeguard skin and eyes from harm exists. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Blue Island, IL
- Average high temperature in May: 66.4°F
The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (29.5°F).
- Average low temperature in May: 51.8°F
The month with the highest average low temperature is July (66.6°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).
Average pressure in May
Blue Island, 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
Blue Island, IL
- Average wind speed in May: 8.4mph
The windiest month (with the highest average wind speed) is January (10.6mph).
The calmest month (with the lowest average wind speed) is August (6.5mph).
Average humidity in May
Blue Island, 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
Blue Island, IL
- Average rainfall in May: 3.07"
The wettest month (with the highest rainfall) is May (3.07").
The driest month (with the least rainfall) is December (1.02").
Average rainfall days in May
Blue Island, IL
- Average rainfall days in May: 17.7 days
The month with the highest number of rainy days is July (18 days).
The month with the least rainy days is February (4.9 days).
Average snowfall in May
Blue Island, IL
- Average snowfall in May: 0"
The month with the highest snowfall is February (3.07").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in May
Blue Island, IL
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is January (11.8 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
Blue Island, 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 54min
The month with the most sunshine is August (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in May
Blue Island, IL
- Average sunshine days in May: 10.8 days
The month with the most sunshine days is November (17.5 days).
The month with the least sunshine days is July (9.8 days).
Average UV index in May
Blue Island, 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
Blue Island, 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 28).
Average visibility in May
Blue Island, 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).
