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
With the transition into May, Lemont experiences an increase in average high-temperatures, moving up from a mild 57°F (13.9°C) in April to an agreeable 69.4°F (20.8°C). Lemont reports an average nighttime low-temperature of 52.3°F (11.3°C) in May.Humidity
In May, the average relative humidity in Lemont is 76%.Rainfall
May is the month with the most rainfall in Lemont. Rain falls for 16.4 days and accumulates 2.83" (72mm) of precipitation.Snowfall
Months with snowfall in Lemont, Illinois, are January through May, October through December. May is the last month it regularly snows. During 0.1 snowfall days, in May, Lemont aggregates 0.04" (1mm) of snow. In Lemont, Illinois, during the entire year, snow falls for 44.4 days and aggregates up to 11.93" (303mm) of snow.Daylight
In May, the average length of the day is 14h and 33min.On the first day of May, sunrise is at 5:47 am and sunset at 7:50 pm. On the last day of the month, sunrise is at 5:19 am and sunset at 8:19 pm CDT.
Sunshine
The average sunshine in May in Lemont, Illinois, is 8.7h.UV index
In May, the average daily maximum UV index in Lemont, Illinois, is 5. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for the average person.Note: A maximum high UV index of 5 in May translates into the following recommendations:
Stay alert. Light-skinned people could suffer burns in less than 30 minutes. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly. Warning! The reflection from snow can nearly magnify the Sun's UV radiation twofold.
Frequently asked questions
What are May temperatures in Lemont?
What is the average humidity in May in Lemont?
What is the rainiest month in Lemont?
How much does it rain in Lemont in May?
What is the last month it snows in Lemont?
What is the average length of the day in May in Lemont?
What time are sunrise and sunset in May in Lemont?
How long on average sun shines in May in Lemont?
How high is the UV index in May in Lemont?
Average temperature in May
Lemont, IL
- Average high temperature in May: 69.4°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 (28.8°F).
- Average low temperature in May: 52.3°F
The month with the highest average low temperature is July (65.7°F).
The coldest month (with the lowest average low temperature) is January (17.1°F).
Average pressure in May
Lemont, 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
Lemont, IL
- Average wind speed in May: 8.1mph
The windiest month (with the highest average wind speed) is January (9.7mph).
The calmest month (with the lowest average wind speed) is August (6mph).
Average humidity in May
Lemont, IL
- Average humidity in May: 76%
The months with the highest relative humidity are January and February (83%).
The month with the lowest relative humidity is October (73%).
Average rainfall in May
Lemont, IL
- Average rainfall in May: 2.83"
The wettest month (with the highest rainfall) is May (2.83").
The driest month (with the least rainfall) is December (1.06").
Average rainfall days in May
Lemont, IL
- Average rainfall days in May: 16.4 days
The month with the highest number of rainy days is July (18.1 days).
The month with the least rainy days is February (4.9 days).
Average snowfall in May
Lemont, IL
- Average snowfall in May: 0.04"
The month with the highest snowfall is January (3.11").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Lemont, IL
- Average snowfall days in May: 0.1 days
The month with the highest number of snowfall days is January (12.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Lemont, 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: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days in May
Lemont, IL
- Average sunshine days in May: 11.7 days
The month with the most sunshine days is November (18.4 days).
The month with the least sunshine days is July (9.3 days).
Average UV index in May
Lemont, 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
Lemont, IL
- Average cloud cover in May: 42
The month with the most cloud cover is January (Cloud cover 60).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in May
Lemont, 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).
Lemont, Illinois, USA
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