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 onset of May marks an increase in the average high-temperature, moving from a comfortable 63.1°F (17.3°C) in April to an agreeable 72.7°F (22.6°C). Throughout May, Frederick's nights cool down to an average of 55.9°F (13.3°C).Humidity
The average relative humidity in May is 79%.Rainfall
May is the month with the most rainfall in Frederick. Rain falls for 17.9 days and accumulates 3.62" (92mm) of precipitation.Snowfall
May through September are months without snowfall.Daylight
The average length of the day in May in Frederick is 14h and 25min.On the first day of the month, sunrise is at 6:00 am and sunset at 7:57 pm. On the last day of May, in Frederick, Illinois, sunrise is at 5:34 am and sunset at 8:24 pm CDT.
Sunshine
In Frederick, the average sunshine in May is 9.1h.UV index
The average daily maximum UV index in May is 5. A UV Index of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for the average person.Note: The maximum UV index, 5 during May, leads to the following recommendations:
Undertake precautions - Guarding against sun damage is counselled. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. Enhance your sun protection with tightly woven, yet airy clothing.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in May in Frederick?
What is the average humidity in May in Frederick?
What is the wettest month in Frederick?
How many days does it rain in May in Frederick?
When it does not snow in Frederick?
Does it snow in Frederick in May?
How many hours of daylight does Frederick have in May?
When are sunrise and sunset in May in Frederick?
How many hours of sunshine does Frederick have in May?
What is the UV index reading in May in Frederick?
Average temperature in May
Frederick, IL
- Average high temperature in May: 72.7°F
The warmest month (with the highest average high temperature) is July (83.3°F).
The month with the lowest average high temperature is January (32.7°F).
- Average low temperature in May: 55.9°F
The month with the highest average low temperature is July (66.6°F).
The coldest month (with the lowest average low temperature) is January (20.5°F).
Average pressure in May
Frederick, IL
- Average pressure in May: 29.95"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in May
Frederick, IL
- Average wind speed in May: 8.4mph
The windiest months (with the highest average wind speed) are January, February and April (10.1mph).
The calmest months (with the lowest average wind speed) are July and August (6.3mph).
Average humidity in May
Frederick, IL
- Average humidity in May: 79%
The month with the highest relative humidity is July (82%).
The month with the lowest relative humidity is October (71%).
Average rainfall in May
Frederick, IL
- Average rainfall in May: 3.62"
The wettest month (with the highest rainfall) is May (3.62").
The driest month (with the least rainfall) is December (1.61").
Average rainfall days in May
Frederick, IL
- Average rainfall days in May: 17.9 days
The month with the highest number of rainy days is May (17.9 days).
The month with the least rainy days is February (6.8 days).
Average snowfall in May
Frederick, IL
- Average snowfall in May: 0"
The month with the highest snowfall is January (4.21").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in May
Frederick, IL
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is January (10.1 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
Frederick, 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 1min
The months with the most sunshine are June and July (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).
Average sunshine days in May
Frederick, IL
- Average sunshine days in May: 10.9 days
The month with the most sunshine days is October (18.7 days).
The month with the least sunshine days is May (10.9 days).
Average UV index in May
Frederick, 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
Frederick, IL
- Average cloud cover in May: 39
The month with the most cloud cover is January (Cloud cover 54).
The months with the least cloud cover are July, August and September (Cloud cover 30).
Average visibility in May
Frederick, IL
- Average visibility in May: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, September, October, November and December (6mi).
The month with the lowest visibility is August (5mi).
Frederick, Illinois, USA
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