May weather forecastStoy, IL
May
Weather in May
The last month of the spring, May, is a warm month in Stoy, Illinois, with temperature in the range of an average low of 57.2°F (14°C) and an average high of 73.8°F (23.2°C).Temperature
Entering May, Stoy sees a temperature rise, with the average high-temperature advancing from April's enjoyable 64°F (17.8°C) to a moderately hot 73.8°F (23.2°C). In Stoy, May is marked by an average low-temperature of 57.2°F (14°C).Humidity
In May, the average relative humidity is 80%.Rainfall
In Stoy, during May, the rain falls for 17.8 days and regularly aggregates up to 3.03" (77mm) of precipitation. Throughout the year, there are 147.2 rainfall days, and 27.87" (708mm) of precipitation is accumulated.Snowfall
In Stoy, snow does not fall in May through October.Daylight
In May, the average length of the day is 14h and 19min.On the first day of the month, sunrise is at 5:52 am and sunset at 7:44 pm. On the last day of May, sunrise is at 5:27 am and sunset at 8:10 pm CDT.
Sunshine
The average sunshine in May is 8.8h.UV index
The months with the highest UV index are May through August, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high health hazard from unsafe exposure to UV radiation for average individuals.Note: In May, the maximum UV index of 6 translates into these guidelines:
Endorse precautions and be consistent with sun safety guidelines. Preventing sunburn is paramount. Between 10 a.m. and 4 p.m., UV radiation is strongest. Make an effort to avoid direct sunlight during this time, remembering that shade structures may not provide full sun protection. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Stoy, IL
- Average high temperature in May: 73.8°F
The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (36°F).
- Average low temperature in May: 57.2°F
The month with the highest average low temperature is July (66.7°F).
The coldest month (with the lowest average low temperature) is January (23.4°F).
Average pressure in May
Stoy, IL
- Average pressure in May: 29.97"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
Stoy, IL
- Average wind speed in May: 8.2mph
The windiest months (with the highest average wind speed) are January and February (10.1mph).
The calmest month (with the lowest average wind speed) is July (5.9mph).
Average humidity in May
Stoy, IL
- Average humidity in May: 80%
The months with the highest relative humidity are July and August (81%).
The month with the lowest relative humidity is October (71%).
Average rainfall in May
Stoy, IL
- Average rainfall in May: 3.03"
The wettest month (with the highest rainfall) is April (4.13").
The driest month (with the least rainfall) is September (1.46").
Average rainfall days in May
Stoy, IL
- Average rainfall days in May: 17.8 days
The month with the highest number of rainy days is May (17.8 days).
The month with the least rainy days is January (8.3 days).
Average snowfall in May
Stoy, IL
- Average snowfall in May: 0"
The month with the highest snowfall is January (1.61").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in May
Stoy, IL
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is January (6 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
Stoy, 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: 8h and 48min
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 12min).
Average sunshine days in May
Stoy, IL
- Average sunshine days in May: 10.8 days
The month with the most sunshine days is October (18.7 days).
The month with the least sunshine days is May (10.8 days).
Average UV index in May
Stoy, 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, November and December (UV index 2).
Average cloud cover in May
Stoy, IL
- Average cloud cover in May: 41
The months with the most cloud cover are January and February (Cloud cover 54).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in May
Stoy, 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).
