May weather forecastRochelle, IL
May
Weather in May
The last month of the spring, May, is an agreeable month in Rochelle, Illinois, with an average temperature fluctuating between 52°F (11.1°C) and 68.9°F (20.5°C).Temperature
Rochelle sees an increase in the average high-temperature with the arrival of May, moving from April's mild 56.8°F (13.8°C) to a pleasant 68.9°F (20.5°C). Rochelle's temperature in May lowers to a consistent average of 52°F (11.1°C) during the nights.Humidity
In Rochelle, the average relative humidity in May is 77%.Rainfall
In Rochelle, during May, the rain falls for 15.5 days and regularly aggregates up to 2.09" (53mm) of precipitation. Throughout the year, there are 124.5 rainfall days, and 14.49" (368mm) of precipitation is accumulated.Snowfall
In Rochelle, snow does not fall in May through September.Daylight
In Rochelle, the average length of the day in May is 14h and 35min.On the first day of the month, sunrise is at 5:51 am and sunset at 7:55 pm. On the last day of May, sunrise is at 5:23 am and sunset at 8:24 pm CDT.
Sunshine
In May, the average sunshine in Rochelle is 8.3h.UV index
The months with the highest UV index in Rochelle are May through August, with an average maximum UV index of 5. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for the ordinary person.Note: An average UV index of 5 in May transforms into this advice:
Proceed with care. Light skin individuals may be exposed to burns in fewer than 30 minutes. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. 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
Average temperature in May
Rochelle, IL
- Average high temperature in May: 68.9°F
The warmest month (with the highest average high temperature) is July (79.9°F).
The month with the lowest average high temperature is January (27°F).
- Average low temperature in May: 52°F
The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (14.7°F).
Average pressure in May
Rochelle, IL
- Average pressure in May: 29.96"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in May
Rochelle, IL
- Average wind speed in May: 8.7mph
The windiest month (with the highest average wind speed) is April (10.3mph).
The calmest month (with the lowest average wind speed) is August (6.3mph).
Average humidity in May
Rochelle, IL
- Average humidity in May: 77%
The months with the highest relative humidity are January and July (85%).
The month with the lowest relative humidity is October (74%).
Average rainfall in May
Rochelle, IL
- Average rainfall in May: 2.09"
The wettest month (with the highest rainfall) is June (2.13").
The driest month (with the least rainfall) is February (0.55").
Average rainfall days in May
Rochelle, IL
- Average rainfall days in May: 15.5 days
The month with the highest number of rainy days is June (16 days).
The month with the least rainy days is February (3.8 days).
Average snowfall in May
Rochelle, IL
- Average snowfall in May: 0"
The month with the highest snowfall is January (2.2").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in May
Rochelle, IL
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is January (10.3 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
Rochelle, IL
- Average daylight in May: 14h and 36min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in May: 8h and 18min
The month with the most sunshine is June (Average sunshine: 9h and 30min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days in May
Rochelle, IL
- Average sunshine days in May: 13.3 days
The month with the most sunshine days is November (19.3 days).
The month with the least sunshine days is June (10.9 days).
Average UV index in May
Rochelle, IL
- Average UV index in May: 5
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in May
Rochelle, IL
- Average cloud cover in May: 44
The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is September (Cloud cover 34).
Average visibility in May
Rochelle, IL
- Average visibility in May: 6mi
The months with the highest visibility are February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, July and August (5mi).
