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
The shift from April to May sees an increase in the average high-temperature, transitioning from a mild 59.9°F (15.5°C) to an agreeable 70.7°F (21.5°C). The average temperature drops to a fresh 54°F (12.2°C) during the night in the month of May.Humidity
In Knoxville, the average relative humidity in May is 79%.Rainfall
The month with the most rainfall is May, when the rain falls for 15.2 days and typically aggregates up to 1.65" (42mm) of precipitation.Snowfall
May through September are months without snowfall.Daylight
In Knoxville, the average length of the day in May is 14h and 29min.On the first day of May, sunrise is at 5:58 am and sunset at 7:58 pm. On the last day of the month, sunrise is at 5:31 am and sunset at 8:26 pm CDT.
Sunshine
The average sunshine in May is 8.7h.UV index
In May, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for average individuals.Note: The maximum UV index, 5 during May, leads to the following recommendations:
Guard yourself - Precautionary measures against sun damage are advocated. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit.
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?
What is the wettest month?
How many days does it rain in May?
When it does not snow?
Does it snow in May?
What is the average length of the day in May?
When are sunrise and sunset in May?
How many hours of sunshine does Knoxville have in May?
What is the UV index reading in May?
Average temperature in May
Knoxville, IL
- Average high temperature in May: 70.7°F
The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (29.5°F).
- Average low temperature in May: 54°F
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (17.4°F).
Average pressure in May
Knoxville, IL
- Average pressure in May: 29.95"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in May
Knoxville, IL
- Average wind speed in May: 9.1mph
The windiest month (with the highest average wind speed) is April (10.8mph).
The calmest months (with the lowest average wind speed) are July and August (6.8mph).
Average humidity in May
Knoxville, IL
- Average humidity in May: 79%
The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (72%).
Average rainfall in May
Knoxville, IL
- Average rainfall in May: 1.65"
The wettest month (with the highest rainfall) is May (1.65").
The driest months (with the least rainfall) are January and December (0.47").
Average rainfall days in May
Knoxville, IL
- Average rainfall days in May: 15.2 days
The month with the highest number of rainy days is May (15.2 days).
The month with the least rainy days is February (3.9 days).
Average snowfall in May
Knoxville, IL
- Average snowfall in May: 0"
The month with the highest snowfall is January (1.38").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in May
Knoxville, IL
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is January (8.8 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
Knoxville, IL
- Average daylight in May: 14h and 3min
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 18min).
- Average sunshine in May: 8h and 4min
The month with the most sunshine is June (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days in May
Knoxville, IL
- Average sunshine days in May: 13.7 days
The month with the most sunshine days is December (21.6 days).
The month with the least sunshine days is June (12.4 days).
Average UV index in May
Knoxville, IL
- Average UV index in May: 5
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in May
Knoxville, IL
- Average cloud cover in May: 42
The month with the most cloud cover is January (Cloud cover 58).
The month with the least cloud cover is September (Cloud cover 30).
Average visibility in May
Knoxville, IL
- Average visibility in May: 6mi
The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (6mi).
The month with the lowest visibility is July (5mi).
Knoxville, Illinois, USA
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