May weather forecast
Sun Prairie, WI

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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.
Updated: Feb 14, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are the temperatures in Sun Prairie in May?

May temperatures in Sun Prairie vary between a high-temperature of 65.8°F (18.8°C) and a low-temperature of 48.7°F (9.3°C).

What is the average humidity in May in Sun Prairie?

In May, the average relative humidity in Sun Prairie is 80%.

What is the wettest month in Sun Prairie?

May is the month with the most rainfall in Sun Prairie, Wisconsin. Rain falls for 17.5 days and accumulates 3.39" (86mm) of precipitation.

How much does it rain in Sun Prairie in May?

In Sun Prairie, in May, it is raining for 17.5 days, with typically 3.39" (86mm) of accumulated precipitation.

When it does not snow in Sun Prairie?

May through September are months without snowfall in Sun Prairie.

Does it snow in Sun Prairie in May?

In May, in Sun Prairie, Wisconsin, it doesn't snow. April is the latest month when it typically snows.

How many hours of daylight does Sun Prairie have in May?

In Sun Prairie, Wisconsin, the average day length in May is 14h and 41min.

When is the sunrise / sunset in May in Sun Prairie?

On the first day of May in Sun Prairie, sunrise is at 5:48 am and sunset at 7:58 pm. On the last day of the month, sunrise is at 5:19 am and sunset at 8:29 pm CDT.

How long on average sun shines in May in Sun Prairie?

In Sun Prairie, the average sunshine duration in May is 8.6h.

What are the months with the highest UV index in Sun Prairie?

May through August, with an average maximum UV index of 5, are months with the highest UV index in Sun Prairie, Wisconsin.

What is the UV index intensity in May in Sun Prairie?

In May, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a medium health risk from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Sun Prairie, WI

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 - 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 - 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 - 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 - 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 - 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 - 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 - 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 / Average sunshine in May - Sun Prairie, WI
  • Average daylight in May: 14h and 4min

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 4min

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 - 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 - 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 - 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 - 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).

Sun Prairie, Wisconsin, USA

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