May weather forecastWaukesha, WI
May
Weather in May
The pleasant spring weather smoothly transitions into early summer during May in Waukesha, Wisconsin. As the temperature steadily rises, the overall climate remains comfortably warm. Despite a moderate cloud cover, the city enjoys over 14 hours of daylight each day. Showers fall across the city towards the latter part of this month yet the humidity remains within a bearable range. As the gusty winds of the colder months diminish, gentle zephyrs become the norm.Temperature
A shift in the average high-temperature is noticeable in May, changing from a cool 51.4°F (10.8°C) in April to a refreshing 63.5°F (17.5°C). Waukesha experiences an average temperature drop to a chilly 47.8°F (8.8°C) during May nights.Humidity
The average relative humidity in May in Waukesha is 79%.Rainfall
In May, the rain falls for 13.1 days. Throughout May, 1.54" (39mm) of precipitation is accumulated. In Waukesha, during the entire year, the rain falls for 114.5 days and collects up to 12.2" (310mm) of precipitation.Snowfall
In Waukesha, snow does not fall in May through September.Daylight
In Waukesha, the average length of the day in May is 14h and 41min.On the first day of May, sunrise is at 5:45 am and sunset at 7:54 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 is 8.6h.UV index
The average daily maximum UV index in May in Waukesha, Wisconsin, is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for ordinary individuals.Note: The UV index of 4 in May translates into these instructions:
Guard yourself - Avoiding sunburn is suggested. Avoiding the Sun during its peak radiation time around midday is a healthy practice. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Caution! The reflection of snow can nearly 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
Waukesha, 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°F).
- Average low temperature in May: 47.8°F
The month with the highest average low temperature is July (63°F).
The coldest month (with the lowest average low temperature) is January (14°F).
Average pressure in May
Waukesha, 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
Waukesha, WI
- Average wind speed in May: 8.6mph
The windiest months (with the highest average wind speed) are January and February (10.6mph).
The calmest month (with the lowest average wind speed) is August (6.7mph).
Average humidity in May
Waukesha, 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, October and November (77%).
Average rainfall in May
Waukesha, WI
- Average rainfall in May: 1.54"
The wettest month (with the highest rainfall) is July (1.73").
The driest months (with the least rainfall) are February and December (0.51").
Average rainfall days in May
Waukesha, WI
- Average rainfall days in May: 13.1 days
The month with the highest number of rainy days is July (14.3 days).
The month with the least rainy days is February (3.6 days).
Average snowfall in May
Waukesha, WI
- Average snowfall in May: 0"
The month with the highest snowfall is January (1.57").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in May
Waukesha, WI
- Average snowfall days in May: 0.2 days
The month with the highest number of snowfall days is January (11.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Waukesha, 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 36min
The months with the most sunshine are July and August (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).
Average sunshine days in May
Waukesha, WI
- Average sunshine days in May: 15 days
The month with the most sunshine days is November (19.3 days).
The month with the least sunshine days is July (13.3 days).
Average UV index in May
Waukesha, 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
Waukesha, WI
- Average cloud cover in May: 43
The month with the most cloud cover is January (Cloud cover 64).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in May
Waukesha, WI
- Average visibility in May: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
