May weather forecastRoyalton, IL
May
Weather in May
The last month of the spring, May, is a moderately hot month in Royalton, Illinois, with an average temperature varying between 58.3°F (14.6°C) and 75.7°F (24.3°C).Temperature
The arrival of May brings a temperature shift, with the average high-temperature escalating from an enjoyable 66.2°F (19°C) in April to a warm 75.7°F (24.3°C). Throughout May, Royalton's nights cool down to an average of 58.3°F (14.6°C).Humidity
May is the most humid month, with an average relative humidity of 79%.Rainfall
In Royalton, in May, during 17.1 rainfall days, 3.82" (97mm) of precipitation is typically accumulated. Throughout the year, in Royalton, there are 158.6 rainfall days, and 34.69" (881mm) of precipitation is accumulated.Snowfall
In Royalton, snow does not fall in May through September.Daylight
In May, the average length of the day in Royalton is 14h and 14min.On the first day of the month, sunrise is at 5:59 am and sunset at 7:47 pm. On the last day of May, sunrise is at 5:35 am and sunset at 8:12 pm CDT.
Sunshine
In May, the average sunshine in Royalton is 9.3h.UV index
The months with the highest UV index are May through August, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high health risk from unsafe exposure to UV radiation for the ordinary person.Note: In May, the maximum UV index of 6 suggests these recommendations:
Endorse precautions and be consistent with sun safety guidelines. Preventing sunburn is paramount. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. Boost your sun resistance with garments that are densely woven yet spacious.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Royalton, IL
- Average high temperature in May: 75.7°F
The warmest month (with the highest average high temperature) is July (87.4°F).
The month with the lowest average high temperature is January (39.6°F).
- Average low temperature in May: 58.3°F
The month with the highest average low temperature is July (68.7°F).
The coldest month (with the lowest average low temperature) is January (26.2°F).
Average pressure in May
Royalton, 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 (29.93"Hg).
Average wind speed in May
Royalton, IL
- Average wind speed in May: 7.5mph
The windiest month (with the highest average wind speed) is January (9.4mph).
The calmest month (with the lowest average wind speed) is August (5.6mph).
Average humidity in May
Royalton, IL
- Average humidity in May: 79%
The month with the highest relative humidity is May (79%).
The month with the lowest relative humidity is October (71%).
Average rainfall in May
Royalton, IL
- Average rainfall in May: 3.82"
The wettest month (with the highest rainfall) is April (4.49").
The driest month (with the least rainfall) is September (1.85").
Average rainfall days in May
Royalton, IL
- Average rainfall days in May: 17.1 days
The month with the highest number of rainy days is May (17.1 days).
The month with the least rainy days is January (9.4 days).
Average snowfall in May
Royalton, IL
- Average snowfall in May: 0"
The month with the highest snowfall is February (1.73").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in May
Royalton, IL
- Average snowfall days in May: 0 days
The months with the highest number of snowfall days are January and February (4.8 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
Royalton, IL
- Average daylight in May: 14h and 12min
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 18min
The month with the most sunshine is June (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 4h and 42min).
Average sunshine days in May
Royalton, IL
- Average sunshine days in May: 11.3 days
The month with the most sunshine days is October (18.5 days).
The month with the least sunshine days is May (11.3 days).
Average UV index in May
Royalton, 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
Royalton, IL
- Average cloud cover in May: 38
The month with the most cloud cover is February (Cloud cover 50).
The months with the least cloud cover are June and August (Cloud cover 27).
Average visibility in May
Royalton, 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).
