May weather forecastEffingham, IL
May
Weather in May
The last month of the spring, May, is a warm month in Effingham, Illinois, with an average temperature ranging between min 56.8°F (13.8°C) and max 73.4°F (23°C).Temperature
May's onset brings a temperature rise, moving from a comfortable 63.3°F (17.4°C) in April to a warm 73.4°F (23°C). An average low-temperature of 56.8°F (13.8°C) is expected during May.Humidity
In May, the average relative humidity in Effingham is 79%.Rainfall
In Effingham, Illinois, in May, it is raining for 14.8 days, with typically 2.44" (62mm) of accumulated precipitation. In Effingham, during the entire year, the rain falls for 135.9 days and collects up to 21.89" (556mm) of precipitation.Snowfall
May through October are months without snowfall.Daylight
In Effingham, the average length of the day in May is 14h and 20min.On the first day of May in Effingham, Illinois, sunrise is at 5:54 am and sunset at 7:47 pm. On the last day of the month, sunrise is at 5:30 am and sunset at 8:13 pm CDT.
Sunshine
In May, the average sunshine in Effingham, Illinois, is 9.1h.UV index
In Effingham, the average daily maximum UV index in May is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for average individuals.Note: In May, the average maximum UV index of 5 translates into the following recommendations:
Exercise caution. The susceptibility of light skin individuals to burns is less than 30 minutes. Avoiding the Sun during its peak radiation time around midday is a healthy practice. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Effingham, IL
- Average high temperature in May: 73.4°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 (35.2°F).
- Average low temperature in May: 56.8°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 (23°F).
Average pressure in May
Effingham, IL
- Average pressure in May: 29.96"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in May
Effingham, IL
- Average wind speed in May: 8.3mph
The windiest month (with the highest average wind speed) is January (10.4mph).
The calmest month (with the lowest average wind speed) is July (6mph).
Average humidity in May
Effingham, 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
Effingham, IL
- Average rainfall in May: 2.44"
The wettest month (with the highest rainfall) is April (2.83").
The driest month (with the least rainfall) is February (1.06").
Average rainfall days in May
Effingham, IL
- Average rainfall days in May: 14.8 days
The month with the highest number of rainy days is July (15.2 days).
The month with the least rainy days is January (6.9 days).
Average snowfall in May
Effingham, IL
- Average snowfall in May: 0"
The month with the highest snowfall is January (1.18").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in May
Effingham, IL
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is February (5.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in May /
Average sunshine in May
Effingham, IL
- Average daylight in May: 14h and 18min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in May: 9h and 6min
The month with the most sunshine is June (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 18min).
Average sunshine days in May
Effingham, IL
- Average sunshine days in May: 12.9 days
The month with the most sunshine days is January (20 days).
The month with the least sunshine days is May (12.9 days).
Average UV index in May
Effingham, 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
Effingham, IL
- Average cloud cover in May: 39
The months with the most cloud cover are January and February (Cloud cover 53).
The months with the least cloud cover are June and September (Cloud cover 29).
Average visibility in May
Effingham, 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).
