May weather forecastPreston Heights, IL
May
Weather in May
The last month of the spring, May, is a pleasant month in Preston Heights, Illinois, with temperature in the range of an average high of 70.3°F (21.3°C) and an average low of 52.3°F (11.3°C).Temperature
The arrival of May sees a shift in the average high-temperature, moving from a mild 58.1°F (14.5°C) in April to a pleasant 70.3°F (21.3°C). In Preston Heights, the average temperature during the nights of May drops to a fresh 52.3°F (11.3°C).Humidity
In Preston Heights, the average relative humidity in May is 77%.Rainfall
May is the month with the most rainfall. Rain falls for 17.8 days and accumulates 4.41" (112mm) of precipitation.Snowfall
May through October are months without snowfall in Preston Heights.Daylight
The average length of the day in May in Preston Heights is 14h and 32min.On the first day of May in Preston Heights, sunrise is at 5:48 am and sunset at 7:50 pm. On the last day of the month, sunrise is at 5:20 am and sunset at 8:19 pm CDT.
Sunshine
The average sunshine in May in Preston Heights is 8.5h.UV index
The average daily maximum UV index in May in Preston Heights is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for the average person.Note: The maximum daily UV index, 5 in May, converts into the following recommendations:
Heed the precautions - Suggestions to avoid sunburn are made. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Preston Heights, IL
- Average high temperature in May: 70.3°F
The warmest month (with the highest average high temperature) is July (81.3°F).
The month with the lowest average high temperature is January (29.3°F).
- Average low temperature in May: 52.3°F
The month with the highest average low temperature is July (64.8°F).
The coldest month (with the lowest average low temperature) is January (17.4°F).
Average pressure in May
Preston Heights, IL
- Average pressure in May: 29.96"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in May
Preston Heights, IL
- Average wind speed in May: 8.3mph
The windiest month (with the highest average wind speed) is April (9.7mph).
The calmest month (with the lowest average wind speed) is August (5.9mph).
Average humidity in May
Preston Heights, IL
- Average humidity in May: 77%
The month with the highest relative humidity is February (83%).
The month with the lowest relative humidity is October (73%).
Average rainfall in May
Preston Heights, IL
- Average rainfall in May: 4.41"
The wettest month (with the highest rainfall) is May (4.41").
The driest month (with the least rainfall) is February (1.61").
Average rainfall days in May
Preston Heights, IL
- Average rainfall days in May: 17.8 days
The month with the highest number of rainy days is July (17.9 days).
The month with the least rainy days is February (5.7 days).
Average snowfall in May
Preston Heights, IL
- Average snowfall in May: 0"
The month with the highest snowfall is January (4.33").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in May
Preston Heights, IL
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is January (11.9 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
Preston Heights, IL
- Average daylight in May: 14h and 30min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in May: 8h and 30min
The month with the most sunshine is August (Average sunshine: 9h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in May
Preston Heights, IL
- Average sunshine days in May: 11.6 days
The month with the most sunshine days is November (18.1 days).
The month with the least sunshine days is June (10.4 days).
Average UV index in May
Preston Heights, IL
- Average UV index in May: 5
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in May
Preston Heights, IL
- Average cloud cover in May: 43
The month with the most cloud cover is January (Cloud cover 60).
The months with the least cloud cover are August and September (Cloud cover 34).
Average visibility in May
Preston Heights, IL
- Average visibility in May: 6mi
The months with the highest visibility are March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, February, July and August (5mi).
