May weather forecastSun Prairie, WI
May
Weather in May
May weather in Sun Prairie, Wisconsin, acts as a segue into summer, allowing local residents to enjoy the increasing warmth. May’s temperature rise, up to 65.8°F (18.8°C), heralds the beginning of summer days, but evenings remain fairly cool. Additional daylight ideally suits outdoor explorations and adventures, while nights retain their crispness. Late May witnesses the bloom of several flowering plants, adding color to the landscape. Despite the sunny days, occasional showers grace the region, bringing respite from the daytime warmth.Temperature
The arrival of May brings a temperature shift, with the average high-temperature escalating from a fresh 53.6°F (12°C) in April to an enjoyable 65.8°F (18.8°C). Throughout May, Sun Prairie encounters an average temperature drop to a frosty 48.7°F (9.3°C).Humidity
In Sun Prairie, the average relative humidity in May is 80%.Rainfall
May is the month with the most rainfall in Sun Prairie. Rain falls for 17.5 days and accumulates 3.39" (86mm) of precipitation.Snowfall
May through September are months without snowfall in Sun Prairie.Daylight
The average length of the day in May is 14h and 41min.On the first day of the month, sunrise is at 5:48 am and sunset at 7:58 pm. On the last day of May, in Sun Prairie, Wisconsin, sunrise is at 5:19 am and sunset at 8:29 pm CDT.
Sunshine
In May, the average sunshine is 8.6h.UV index
The months with the highest UV index in Sun Prairie are May through August, with an average maximum UV index of 5. A UV Index of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for the ordinary person.Note: In May, the maximum UV index of 5 transforms into these recommendations:
Be cautious. Those with fair skin can be subjected to burns in fewer than 30 minutes. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. During bright days, sunglasses that offer UVA and UVB defense are recommended. Be vigilant! The reflective nature of snow can increase the Sun's UV radiation nearly twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Sun Prairie, WI
- Average high temperature in May: 65.8°F
The warmest month (with the highest average high temperature) is July (78.6°F).
The month with the lowest average high temperature is January (23.4°F).
- Average low temperature in May: 48.7°F
The month with the highest average low temperature is July (61.5°F).
The coldest month (with the lowest average low temperature) is January (10.9°F).
Average pressure in May
Sun Prairie, WI
- Average pressure in May: 29.96"Hg
The months with the highest atmospheric pressure are January and February (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in May
Sun Prairie, 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 (6.6mph).
Average humidity in May
Sun Prairie, WI
- Average humidity in May: 80%
The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is April (76%).
Average rainfall in May
Sun Prairie, WI
- Average rainfall in May: 3.39"
The wettest month (with the highest rainfall) is May (3.39").
The driest month (with the least rainfall) is February (1.1").
Average rainfall days in May
Sun Prairie, WI
- Average rainfall days in May: 17.5 days
The month with the highest number of rainy days is May (17.5 days).
The month with the least rainy days is January (4.7 days).
Average snowfall in May
Sun Prairie, WI
- Average snowfall in May: 0"
The month with the highest snowfall is January (5.04").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in May
Sun Prairie, WI
- Average snowfall days in May: 0.3 days
The month with the highest number of snowfall days is January (14.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Sun Prairie, WI
- Average daylight in May: 14h and 42min
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 0min).
- Average sunshine in May: 8h and 36min
The month with the most sunshine is July (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 18min).
Average sunshine days in May
Sun Prairie, WI
- Average sunshine days in May: 11.3 days
The month with the most sunshine days is December (16.8 days).
The month with the least sunshine days is June (10.8 days).
Average UV index in May
Sun Prairie, WI
- 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, November and December (UV index 1).
Average cloud cover in May
Sun Prairie, WI
- Average cloud cover in May: 43
The month with the most cloud cover is January (Cloud cover 65).
The months with the least cloud cover are July and August (Cloud cover 33).
Average visibility in May
Sun Prairie, WI
- Average visibility in May: 6mi
The months with the highest visibility are March, April, May, June, October and November (6mi).
The months with the lowest visibility are January, February, July, August, September and December (5mi).
