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 sea temperature 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
With the transition into May, Chicago experiences an increase in average high-temperatures, moving up from a cool 50.7°F (10.4°C) in April to a refreshing 61°F (16.1°C). During May nights, Chicago records an average temperature of 50.4°F (10.2°C).Humidity
In May, the average relative humidity is 79%.Rainfall
In May, the rain falls for 18.3 days. Throughout May, 4.61" (117mm) of precipitation is accumulated. Throughout the year, in Chicago, there are 160.2 rainfall days, and 36.97" (939mm) of precipitation is accumulated.Snowfall
January through May, November and December are months with snowfall. May is the last month it regularly snows. During 0.2 snowfall days, in May, Chicago aggregates 0.08" (2mm) of snow. Throughout the year, in Chicago, Illinois, there are 40.9 snowfall days, and 13.9" (353mm) of snow is accumulated.Ocean temperature
In Chicago, Illinois, in May, the average water temperature is 45°F (7.2°C).Note: Unprotected swimming in 45°F (7.2°C) is dangerous due to potential cold shock. Especially when temperatures go below 50°F (10°C), leading to hyperventilation.
Daylight
In May, the average length of the day in Chicago is 14h and 34min.On the first day of the month, sunrise is at 5:45 am and sunset at 7:49 pm. On the last day of May, sunrise is at 5:17 am and sunset at 8:18 pm CDT.
Sunshine
The average sunshine in May in Chicago is 8.9h.UV index
The average daily maximum UV index in May in Chicago is 4. A UV Index reading of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The daily high UV index of 4 in May translates into this advice:
Be vigilant - A duty to shield skin and eyes from injury exists. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
Frequently asked questions
What is the usual temperature for Chicago in May?
What is the average humidity in May in Chicago?
How much does it rain in Chicago in May?
What is the last month it snows in Chicago?
What is the ocean temperature in May in Chicago?
What is the average length of the day in May in Chicago?
When is the sunrise / sunset in May in Chicago?
How long on average sun shines in May in Chicago?
What is the UV index intensity in May in Chicago?
Average temperature in May
Chicago, IL
- Average high temperature in May: 61°F
The warmest month (with the highest average high temperature) is August (77.5°F).
The month with the lowest average high temperature is January (29.7°F).
- Average low temperature in May: 50.4°F
The month with the highest average low temperature is July (67.8°F).
The coldest month (with the lowest average low temperature) is January (20.7°F).
Average pressure in May
Chicago, IL
- Average pressure in May: 29.97"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
Chicago, IL
- Average wind speed in May: 9.4mph
The windiest month (with the highest average wind speed) is January (12.5mph).
The calmest month (with the lowest average wind speed) is July (7.7mph).
Average humidity in May
Chicago, IL
- Average humidity in May: 79%
The month with the highest relative humidity is January (82%).
The month with the lowest relative humidity is October (73%).
Average rainfall in May
Chicago, IL
- Average rainfall in May: 4.61"
The wettest month (with the highest rainfall) is June (4.88").
The driest month (with the least rainfall) is December (1.65").
Average rainfall days in May
Chicago, IL
- Average rainfall days in May: 18.3 days
The month with the highest number of rainy days is July (18.5 days).
The month with the least rainy days is February (5.5 days).
Average snowfall in May
Chicago, IL
- Average snowfall in May: 0.08"
The month with the highest snowfall is February (3.54").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in May
Chicago, IL
- Average snowfall days in May: 0.2 days
The month with the highest number of snowfall days is January (10.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average sea temperature in May
Chicago, IL
- Average sea temperature in May: 44.8°F
The best month for swimming (with the highest average sea temperature) is August (73.9°F).
The coldest month (with the lowest average sea temperature) is February (36.9°F).
Average daylight in May /
Average sunshine in May
Chicago, IL
- Average daylight in May: 14h and 4min
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 5min
The months with the most sunshine are July and August (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in May
Chicago, IL
- Average sunshine days in May: 10.6 days
The month with the most sunshine days is December (15.5 days).
The month with the least sunshine days is July (9.3 days).
Average UV index in May
Chicago, IL
- Average UV index in May: 4
The months with the highest UV index are 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
Chicago, IL
- Average cloud cover in May: 41
The month with the most cloud cover is January (Cloud cover 62).
The months with the least cloud cover are July and August (Cloud cover 27).
Average visibility in May
Chicago, 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).
Chicago, Illinois, USA
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