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
May's arrival is marked by an increase in the average high-temperature, moving from an enjoyable 61.9°F (16.6°C) in April to an agreeable 72.7°F (22.6°C). Allerton's average low-temperature during May nights is observed to be a mild 56.5°F (13.6°C).Humidity
In Allerton, the average relative humidity in May is 77%.Rainfall
In Allerton, in May, during 15.6 rainfall days, 1.89" (48mm) of precipitation is typically accumulated. In Allerton, Illinois, during the entire year, the rain falls for 132 days and collects up to 15.94" (405mm) of precipitation.Snowfall
May through September are months without snowfall.Daylight
In Allerton, the average length of the day in May is 14h and 24min.On the first day of the month, sunrise is at 5:50 am and sunset at 7:46 pm. On the last day of May, in Allerton, sunrise is at 5:25 am and sunset at 8:13 pm CDT.
Sunshine
In May, the average sunshine is 9h.UV index
The average daily maximum UV index in May is 5. A UV Index estimate of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: A typical high UV index of 5 in May suggests the following recommendations:
Preventative actions are necessary - Recommendations to ward off sunburn are given. The solar radiation around mid-day is intense; avoid the Sun and stay safe. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average May temperature?
What is the average humidity in May?
How many days does it rain in May?
When it does not snow?
Does it snow in May?
How many hours of daylight does Allerton have in May?
When are sunrise and sunset in May?
How long on average sun shines in May?
How high is the UV index in May?
Average temperature in May
Allerton, IL
- Average high temperature in May: 72.7°F
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (33.3°F).
- Average low temperature in May: 56.5°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 (21°F).
Average pressure in May
Allerton, IL
- Average pressure in May: 29.96"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in May
Allerton, IL
- Average wind speed in May: 8.8mph
The windiest month (with the highest average wind speed) is January (10.8mph).
The calmest months (with the lowest average wind speed) are July and August (6.3mph).
Average humidity in May
Allerton, IL
- Average humidity in May: 77%
The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (70%).
Average rainfall in May
Allerton, IL
- Average rainfall in May: 1.89"
The wettest month (with the highest rainfall) is April (1.97").
The driest month (with the least rainfall) is February (0.83").
Average rainfall days in May
Allerton, IL
- Average rainfall days in May: 15.6 days
The month with the highest number of rainy days is July (15.7 days).
The month with the least rainy days is February (6 days).
Average snowfall in May
Allerton, IL
- Average snowfall in May: 0"
The month with the highest snowfall is December (1.26").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in May
Allerton, IL
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is January (8 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
Allerton, IL
- Average daylight in May: 14h and 2min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in May: 9h and 0min
The month with the most sunshine is June (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days in May
Allerton, IL
- Average sunshine days in May: 12.2 days
The month with the most sunshine days is November (19.8 days).
The month with the least sunshine days is July (11.1 days).
Average UV index in May
Allerton, IL
- Average UV index in May: 5
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in May
Allerton, IL
- Average cloud cover in May: 39
The month with the most cloud cover is January (Cloud cover 56).
The month with the least cloud cover is June (Cloud cover 30).
Average visibility in May
Allerton, IL
- Average visibility in May: 6mi
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).
Allerton, Illinois, USA
Weather forecast for your location
2. Allow the app to use your location