May weather forecastHartland, WI
May
Weather in May
The last month of the spring, May, is a refreshing month in Hartland, Wisconsin, with an average temperature varying between 47.3°F (8.5°C) and 63.5°F (17.5°C).Temperature
Hartland's transition into May is marked by a rise in the average high-temperature, advancing from a fresh 51.4°F (10.8°C) in April to a refreshing 63.5°F (17.5°C). Hartland's average low-temperature during May nights is observed to be a chilly 47.3°F (8.5°C).Humidity
In Hartland, the average relative humidity in May is 79%.Rainfall
In Hartland, in May, during 18.1 rainfall days, 3.11" (79mm) of precipitation is typically accumulated. In Hartland, during the entire year, the rain falls for 149.2 days and collects up to 28.54" (725mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. May is the last month it regularly snows. During 0.2 snowfall days, in May, Hartland aggregates 0.04" (1mm) of snow. In Hartland, Wisconsin, during the entire year, snow falls for 58.7 days and aggregates up to 20.47" (520mm) of snow.Daylight
In May, the average length of the day in Hartland is 14h and 41min.On the first day of May, sunrise is at 5:45 am and sunset at 7:55 pm. On the last day of the month, sunrise is at 5:16 am and sunset at 8:25 pm CDT.
Sunshine
The average sunshine in May in Hartland is 8.7h.UV index
The average daily maximum UV index in May in Hartland, Wisconsin, is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for the average person.Note: The average daily UV index of 4 in May transforms into the following instructions:
Be mindful. Individuals with a lighter skin tone may suffer burns in less than 30 minutes. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly. Consider this! The reflection from snow can almost double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Hartland, WI
- Average high temperature in May: 63.5°F
The warmest month (with the highest average high temperature) is July (78.1°F).
The month with the lowest average high temperature is January (25.2°F).
- Average low temperature in May: 47.3°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 (13.6°F).
Average pressure in May
Hartland, WI
- Average pressure in May: 29.96"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in May
Hartland, WI
- Average wind speed in May: 8.6mph
The windiest month (with the highest average wind speed) is January (10.5mph).
The calmest months (with the lowest average wind speed) are July and August (6.7mph).
Average humidity in May
Hartland, 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 (77%).
Average rainfall in May
Hartland, WI
- Average rainfall in May: 3.11"
The wettest month (with the highest rainfall) is June (3.43").
The driest month (with the least rainfall) is February (1.46").
Average rainfall days in May
Hartland, WI
- Average rainfall days in May: 18.1 days
The month with the highest number of rainy days is May (18.1 days).
The month with the least rainy days is February (5.3 days).
Average snowfall in May
Hartland, WI
- Average snowfall in May: 0.04"
The month with the highest snowfall is January (5.43").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Hartland, WI
- Average snowfall days in May: 0.2 days
The month with the highest number of snowfall days is January (15.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Hartland, 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 6min).
- Average sunshine in May: 8h and 42min
The month with the most sunshine is August (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).
Average sunshine days in May
Hartland, WI
- Average sunshine days in May: 10.6 days
The month with the most sunshine days is November (15.9 days).
The months with the least sunshine days are June and July (10.3 days).
Average UV index in May
Hartland, WI
- Average UV index in May: 4
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
Hartland, WI
- Average cloud cover in May: 42
The month with the most cloud cover is January (Cloud cover 63).
The months with the least cloud cover are August and September (Cloud cover 30).
Average visibility in May
Hartland, WI
- Average visibility in May: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January and February (5mi).
