May weather forecastOak Forest, IL
May
Weather in May
The last month of the spring, May, is a pleasant month in Oak Forest, Illinois, with temperature in the range of an average low of 52.5°F (11.4°C) and an average high of 68.7°F (20.4°C).Temperature
The arrival of May brings a temperature shift, with the average high-temperature escalating from a mild 57°F (13.9°C) in April to an agreeable 68.7°F (20.4°C). In May, Oak Forest experiences a temperature dip to an average of 52.5°F (11.4°C) at night.Humidity
In Oak Forest, the average relative humidity in May is 76%.Rainfall
May is the month with the most rainfall in Oak Forest. Rain falls for 12.4 days and accumulates 1.54" (39mm) of precipitation.Snowfall
May through September are months without snowfall.Daylight
In May, the average length of the day in Oak Forest is 14h and 33min.On the first day of May in Oak Forest, sunrise is at 5:46 am and sunset at 7:49 pm. On the last day of the month, sunrise is at 5:19 am and sunset at 8:18 pm CDT.
Sunshine
In Oak Forest, the average sunshine in May is 8.7h.UV index
The average daily maximum UV index in May is 5. A UV Index estimate of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for the ordinary person.Note: The UV index of 5 during May leads to these advisories:
Ensure safety - Imperative it is to shield skin and eyes from damage. The solar radiation around mid-day is intense; avoid the Sun and stay safe. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Oak Forest, IL
- Average high temperature in May: 68.7°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 (29.7°F).
- Average low temperature in May: 52.5°F
The month with the highest average low temperature is July (65.8°F).
The coldest month (with the lowest average low temperature) is January (18.7°F).
Average pressure in May
Oak Forest, 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
Oak Forest, IL
- Average wind speed in May: 8.3mph
The windiest month (with the highest average wind speed) is January (10.1mph).
The calmest month (with the lowest average wind speed) is August (6.2mph).
Average humidity in May
Oak Forest, IL
- Average humidity in May: 76%
The month with the highest relative humidity is February (83%).
The month with the lowest relative humidity is October (73%).
Average rainfall in May
Oak Forest, IL
- Average rainfall in May: 1.54"
The wettest month (with the highest rainfall) is May (1.54").
The driest months (with the least rainfall) are January, February and December (0.55").
Average rainfall days in May
Oak Forest, IL
- Average rainfall days in May: 12.4 days
The month with the highest number of rainy days is July (14.1 days).
The month with the least rainy days is February (4.1 days).
Average snowfall in May
Oak Forest, IL
- Average snowfall in May: 0"
The month with the highest snowfall is January (1.3").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in May
Oak Forest, IL
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is January (10.3 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
Oak Forest, 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 42min
The month with the most sunshine is August (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in May
Oak Forest, IL
- Average sunshine days in May: 15 days
The month with the most sunshine days is November (20.7 days).
The month with the least sunshine days is June (13.1 days).
Average UV index in May
Oak Forest, 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
Oak Forest, 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 30).
Average visibility in May
Oak Forest, 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).
