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 onset witnesses a shift in the average high-temperature, moving from a refreshing 66.6°F (19.2°C) in April to a warm 75.7°F (24.3°C). Throughout May, a steady low-temperature average of 57.9°F (14.4°C) is noted.Humidity
The months with the highest humidity in Simpson are March and May, with an average relative humidity of 79%.Rainfall
In Simpson, during May, the rain falls for 12.7 days and regularly aggregates up to 1.34" (34mm) of precipitation. Throughout the year, there are 118.3 rainfall days, and 13.03" (331mm) of precipitation is accumulated.Snowfall
In Simpson, snow does not fall in April through October.Daylight
In May, the average length of the day is 14h and 12min.On the first day of the month, sunrise is at 5:58 am and sunset at 7:45 pm. On the last day of May, sunrise is at 5:35 am and sunset at 8:10 pm CDT.
Sunshine
The average sunshine in May is 9.1h.UV index
The months with the highest UV index in Simpson are May through August, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for ordinary individuals.Note: The maximum daily UV index of 6 in May converts into the following recommendations:
Evade overexposure. Individuals with fair skin risk burning in under 20 minutes. During the period from 10 a.m. to 4 p.m., UV radiation is highest. Try to avoid direct sunlight during these hours. 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 temperature in May in Simpson?
What are the most humid months in Simpson?
What is the average humidity in May in Simpson?
How much does it rain in Simpson in May?
When it does not snow in Simpson?
What is the average length of the day in May in Simpson?
What time are sunrise and sunset in May in Simpson?
How long on average sun shines in May in Simpson?
What is the month with the highest UV index in Simpson?
What is the UV index reading in May in Simpson?
Average temperature in May
Simpson, IL
- Average high temperature in May: 75.7°F
The warmest month (with the highest average high temperature) is July (88°F).
The month with the lowest average high temperature is January (40.1°F).
- Average low temperature in May: 57.9°F
The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (27°F).
Average pressure in May
Simpson, IL
- Average pressure in May: 29.97"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in May
Simpson, IL
- Average wind speed in May: 7.5mph
The windiest months (with the highest average wind speed) are January and February (9mph).
The calmest months (with the lowest average wind speed) are July and August (5.7mph).
Average humidity in May
Simpson, IL
- Average humidity in May: 79%
The months with the highest relative humidity are March and May (79%).
The month with the lowest relative humidity is October (71%).
Average rainfall in May
Simpson, IL
- Average rainfall in May: 1.34"
The wettest month (with the highest rainfall) is June (1.5").
The driest month (with the least rainfall) is September (0.47").
Average rainfall days in May
Simpson, IL
- Average rainfall days in May: 12.7 days
The month with the highest number of rainy days is July (13.1 days).
The months with the least rainy days are January, February and December (7.3 days).
Average snowfall in May
Simpson, IL
- Average snowfall in May: 0"
The month with the highest snowfall is February (0.67").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in May
Simpson, IL
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is January (3.3 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
Simpson, IL
- Average daylight in May: 14h and 1min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in May: 9h and 1min
The months with the most sunshine are June and July (Average sunshine: 10h and 24min).
The months with the least sunshine are January and February (Average sunshine: 4h and 36min).
Average sunshine days in May
Simpson, IL
- Average sunshine days in May: 15.3 days
The month with the most sunshine days is October (21.5 days).
The month with the least sunshine days is June (14.8 days).
Average UV index in May
Simpson, IL
- Average UV index in May: 6
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February and December (UV index 2).
Average cloud cover in May
Simpson, IL
- Average cloud cover in May: 40
The months with the most cloud cover are January and February (Cloud cover 51).
The month with the least cloud cover is September (Cloud cover 28).
Average visibility in May
Simpson, 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).
Simpson, Illinois, USA
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