May weather forecastWillowbrook, IL
May
Weather in May
May, the last month of the spring in Willowbrook, is an enjoyable month, with an average temperature fluctuating between 67.6°F (19.8°C) and 52°F (11.1°C).Temperature
In Willowbrook, the onset of May comes with an increased average high-temperature, moving from April's mild 55.9°F (13.3°C) to a still refreshing 67.6°F (19.8°C). Throughout May, Willowbrook registers a consistent average low-temperature of 52°F (11.1°C).Humidity
The average relative humidity in May in Willowbrook is 75%.Rainfall
May is the month with the most rainfall. Rain falls for 19.2 days and accumulates 4.61" (117mm) of precipitation.Snowfall
In Willowbrook, snow does not fall in May through September.Daylight
In Willowbrook, 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 Willowbrook, sunrise is at 5:19 am and sunset at 8:19 pm CDT.
Sunshine
The average sunshine in May is 8.7h.UV index
In Willowbrook, the average daily maximum UV index in May is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for average individuals.Note: A maximum daily UV index of 5 during May morphs into the following directions:
Exercise prudence. Persons with fair skin could be burned in under 30 minutes. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Willowbrook, IL
- Average high temperature in May: 67.6°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 (28.9°F).
- Average low temperature in May: 52°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 (18.3°F).
Average pressure in May
Willowbrook, 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
Willowbrook, IL
- Average wind speed in May: 8.2mph
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
Willowbrook, 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
Willowbrook, IL
- Average rainfall in May: 4.61"
The wettest month (with the highest rainfall) is May (4.61").
The driest months (with the least rainfall) are November and December (1.77").
Average rainfall days in May
Willowbrook, IL
- Average rainfall days in May: 19.2 days
The month with the highest number of rainy days is June (19.4 days).
The month with the least rainy days is February (5.9 days).
Average snowfall in May
Willowbrook, IL
- Average snowfall in May: 0"
The month with the highest snowfall is February (5.28").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in May
Willowbrook, IL
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is January (13.3 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
Willowbrook, 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 42min
The month with the most sunshine is August (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in May
Willowbrook, IL
- Average sunshine days in May: 9.5 days
The month with the most sunshine days is November (16.1 days).
The month with the least sunshine days is June (8.2 days).
Average UV index in May
Willowbrook, IL
- Average UV index in May: 5
The months with the highest UV index are July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in May
Willowbrook, IL
- Average cloud cover in May: 42
The month with the most cloud cover is January (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in May
Willowbrook, IL
- Average visibility in May: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January and February (5mi).
