May weather forecastJanesville, WI
May
Weather in May
May in Janesville, Wisconsin sees the consolidation of spring and teases the impending arrival of summer. Nature is in full blossom, with greenery spanning the panoramic view and people venturing outdoors to enjoy the balmy weather. Rainfall has its pinnacle during this month, reaching 2.32" (59mm) over 16 days. This contributes to the vibrancy of the city's natural beauty, making May an excellent time for picnics in the parks, long walks, or just appreciating nature. The pleasant weather and attractive landscapes make this an inviting month to explore the city.Temperature
May comes with an increase, with the average high-temperature moving from a fresh 54.9°F (12.7°C) in April to an enjoyable 67.1°F (19.5°C). Janesville experiences a steady low-temperature of 49.5°F (9.7°C) throughout May.Humidity
In Janesville, the average relative humidity in May is 79%.Rainfall
In Janesville, in May, it is raining for 16 days, with typically 2.32" (59mm) of accumulated precipitation. Throughout the year, there are 127.7 rainfall days, and 17.87" (454mm) of precipitation is accumulated.Snowfall
In Janesville, snow does not fall in May through September.Daylight
In May, the average length of the day is 14h and 39min.On the first day of May, sunrise is at 5:49 am and sunset at 7:56 pm. On the last day of the month, sunrise is at 5:20 am and sunset at 8:27 pm CDT.
Sunshine
The average sunshine in May is 8.5h.UV index
The average daily maximum UV index in May is 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for the average person.Note: In May, an average UV index of 5 transforms into the following instructions:
Guard yourself - An obligation to protect skin and eyes from harm exists. When the Sun is at its strongest around midday, find shade and limit exposure. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays. Note this! The Sun's UV radiation can nearly be doubled by the reflection off snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Janesville, WI
- Average high temperature in May: 67.1°F
The warmest month (with the highest average high temperature) is July (79.7°F).
The month with the lowest average high temperature is January (25°F).
- Average low temperature in May: 49.5°F
The month with the highest average low temperature is July (62.4°F).
The coldest month (with the lowest average low temperature) is January (12.9°F).
Average pressure in May
Janesville, WI
- Average pressure in May: 29.96"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in May
Janesville, WI
- Average wind speed in May: 8.6mph
The windiest month (with the highest average wind speed) is April (10.1mph).
The calmest month (with the lowest average wind speed) is August (6.4mph).
Average humidity in May
Janesville, WI
- Average humidity in May: 79%
The month with the highest relative humidity is January (87%).
The months with the lowest relative humidity are April and October (76%).
Average rainfall in May
Janesville, WI
- Average rainfall in May: 2.32"
The wettest month (with the highest rainfall) is June (2.76").
The driest months (with the least rainfall) are January and February (0.75").
Average rainfall days in May
Janesville, WI
- Average rainfall days in May: 16 days
The month with the highest number of rainy days is June (16.3 days).
The month with the least rainy days is January (3.5 days).
Average snowfall in May
Janesville, WI
- Average snowfall in May: 0"
The month with the highest snowfall is January (2.83").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in May
Janesville, WI
- Average snowfall days in May: 0.1 days
The month with the highest number of snowfall days is January (12.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Janesville, WI
- Average daylight in May: 14h and 36min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in May: 8h and 30min
The months with the most sunshine are July and August (Average sunshine: 9h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).
Average sunshine days in May
Janesville, WI
- Average sunshine days in May: 12.6 days
The month with the most sunshine days is November (19.1 days).
The month with the least sunshine days is June (10.9 days).
Average UV index in May
Janesville, WI
- Average UV index in May: 5
The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in May
Janesville, WI
- Average cloud cover in May: 44
The month with the most cloud cover is January (Cloud cover 64).
The month with the least cloud cover is September (Cloud cover 34).
Average visibility in May
Janesville, WI
- Average visibility in May: 6mi
The months with the highest visibility are March, April, May, June, October, November and December (6mi).
The months with the lowest visibility are January, February, July, August and September (5mi).
