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
As May begins, there is an increase in the average high-temperature, moving from a cool 52°F (11.1°C) in April to an enjoyable 62.8°F (17.1°C). Winnetka experiences a nighttime temperature average of 50.4°F (10.2°C) during May.Humidity
In May, the average relative humidity in Winnetka is 77%.Rainfall
The months with the most rainfall in Winnetka are May and June, with an average 4.57" (116mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. May is the last month it regularly snows in Winnetka. During 0.1 snowfall days, in May, Winnetka aggregates 0.08" (2mm) of snow. Throughout the year, there are 47.6 snowfall days, and 17.8" (452mm) of snow is accumulated.Daylight
In Winnetka, the average length of the day in May is 14h and 35min.On the first day of May in Winnetka, sunrise is at 5:45 am and sunset at 7:50 pm. On the last day of the month, sunrise is at 5:17 am and sunset at 8:20 pm CDT.
Sunshine
In Winnetka, the average sunshine in May is 8.7h.UV index
In Winnetka, the average daily maximum UV index in May is 5. A UV Index estimate of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for the average person.Note: In May, a daily UV index of 5 turns into the following recommendations:
Exercise prevention - Precautions against solar damage are endorsed. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes. On your guard! Snow's reflection can almost double the intensity of the Sun's UV radiation.
Frequently asked questions
What are May temperatures in Winnetka?
What is the average humidity in May in Winnetka?
What is the rainiest month in Winnetka?
How much does it rain in Winnetka in May?
What is the last month it snows in Winnetka?
How many hours of daylight does Winnetka have in May?
What time are sunrise and sunset in May in Winnetka?
How many hours of sunshine does Winnetka have in May?
What is the UV index intensity in May in Winnetka?
Average temperature in May
Winnetka, IL
- Average high temperature in May: 62.8°F
The warmest month (with the highest average high temperature) is July (79.2°F).
The month with the lowest average high temperature is January (28.8°F).
- Average low temperature in May: 50.4°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 (18.9°F).
Average pressure in May
Winnetka, 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
Winnetka, IL
- Average wind speed in May: 8.9mph
The windiest month (with the highest average wind speed) is January (11.5mph).
The calmest month (with the lowest average wind speed) is August (7.1mph).
Average humidity in May
Winnetka, IL
- Average humidity in May: 77%
The month with the highest relative humidity is January (82%).
The month with the lowest relative humidity is October (73%).
Average rainfall in May
Winnetka, IL
- Average rainfall in May: 4.57"
The wettest months (with the highest rainfall) are May and June (4.57").
The driest month (with the least rainfall) is December (1.65").
Average rainfall days in May
Winnetka, IL
- Average rainfall days in May: 19.1 days
The month with the highest number of rainy days is May (19.1 days).
The month with the least rainy days is February (6.1 days).
Average snowfall in May
Winnetka, IL
- Average snowfall in May: 0.08"
The month with the highest snowfall is January (4.84").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Winnetka, IL
- Average snowfall days in May: 0.1 days
The month with the highest number of snowfall days is January (13.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Winnetka, 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 4min
The months with the most sunshine are July and August (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in May
Winnetka, IL
- Average sunshine days in May: 10 days
The month with the most sunshine days is November (15.5 days).
The month with the least sunshine days is June (9.2 days).
Average UV index in May
Winnetka, 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
Winnetka, IL
- Average cloud cover in May: 41
The month with the most cloud cover is January (Cloud cover 61).
The months with the least cloud cover are July and August (Cloud cover 28).
Average visibility in May
Winnetka, 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).
Winnetka, Illinois, USA
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