May weather forecastHillside, IL
May
Weather in May
The last month of the spring, May, is a comfortable month in Hillside, Illinois, with an average temperature varying between 51.6°F (10.9°C) and 67.3°F (19.6°C).Temperature
As April transitions into May, a change in temperatures is observed, with average highs moving from a cool 55.2°F (12.9°C) to a refreshing 67.3°F (19.6°C). May nights observe an average temperature dip to a cool 51.6°F (10.9°C).Humidity
The average relative humidity in May in Hillside is 75%.Rainfall
May is the month with the most rainfall. Rain falls for 17.3 days and accumulates 3.11" (79mm) of precipitation.Snowfall
January through May, October through December are months with snowfall in Hillside. May is the last month it regularly snows. During 0.1 snowfall days, in May, Hillside aggregates 0.04" (1mm) of snow. Throughout the year, in Hillside, Illinois, there are 45.8 snowfall days, and 14.25" (362mm) of snow is accumulated.Daylight
In May, the average length of the day is 14h and 34min.On the first day of May, sunrise is at 5:46 am and sunset at 7:50 pm. On the last day of the month, sunrise is at 5:18 am and sunset at 8:19 pm CDT.
Sunshine
The average sunshine in May is 8.6h.UV index
In May, the average daily maximum UV index in Hillside is 5. A UV Index reading of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In May, a regular UV index of 5 translates into these guidelines:
Ensure safety - Sun damage prevention is strongly urged. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A hat with a broad brim is indispensable, filtering out up to half of UV rays. Take heed! Reflection from the snow can almost amplify the Sun's UV radiation by double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Hillside, IL
- Average high temperature in May: 67.3°F
The warmest month (with the highest average high temperature) is July (81.9°F).
The month with the lowest average high temperature is January (28.8°F).
- Average low temperature in May: 51.6°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°F).
Average pressure in May
Hillside, 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
Hillside, IL
- Average wind speed in May: 8.3mph
The windiest month (with the highest average wind speed) is January (10.2mph).
The calmest month (with the lowest average wind speed) is August (6.3mph).
Average humidity in May
Hillside, IL
- Average humidity in May: 75%
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
Hillside, IL
- Average rainfall in May: 3.11"
The wettest month (with the highest rainfall) is May (3.11").
The driest month (with the least rainfall) is December (1.14").
Average rainfall days in May
Hillside, IL
- Average rainfall days in May: 17.3 days
The months with the highest number of rainy days are May and July (17.3 days).
The month with the least rainy days is February (5.1 days).
Average snowfall in May
Hillside, IL
- Average snowfall in May: 0.04"
The month with the highest snowfall is February (3.86").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Hillside, IL
- Average snowfall days in May: 0.1 days
The month with the highest number of snowfall days is January (12.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Hillside, 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 36min
The months with the most sunshine are July and August (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in May
Hillside, IL
- Average sunshine days in May: 10.8 days
The month with the most sunshine days is November (16.8 days).
The month with the least sunshine days is July (9.5 days).
Average UV index in May
Hillside, IL
- Average UV index in May: 5
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in May
Hillside, IL
- Average cloud cover in May: 43
The month with the most cloud cover is January (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in May
Hillside, 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).
