May weather forecastMerrillan, WI
May
Weather in May
The warmer weather solidifies in May, as temperatures climb toward peak values. Rainfall continues to increase, making this the rainiest period until now. The prolonged daylight hours of up to 14.8 hours and increased sunshine brighten up the town. As the pressure fluctuates, wind speed drops slightly. It is in May that the last vestiges of winter's snow give way to the complete dominance of spring rains.Temperature
May signals a shift in the average high-temperature, moving from April's cool 51.8°F (11°C) to a comfortable 64.9°F (18.3°C). Merrillan witnesses a consistent average low-temperature of 46.9°F (8.3°C) throughout May.Humidity
In May, the average relative humidity is 79%.Rainfall
In Merrillan, in May, during 15 rainfall days, 2.13" (54mm) of precipitation is typically accumulated. Throughout the year, there are 120.8 rainfall days, and 16.34" (415mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall. May is the last month it regularly snows in Merrillan. During 0.5 snowfall days, in May, Merrillan aggregates 0.04" (1mm) of snow. Throughout the year, there are 62.1 snowfall days, and 13.11" (333mm) of snow is accumulated.Daylight
In Merrillan, the average length of the day in May is 14h and 49min.On the first day of the month, sunrise is at 5:52 am and sunset at 8:08 pm. On the last day of May, sunrise is at 5:21 am and sunset at 8:40 pm CDT.
Sunshine
The average sunshine in May in Merrillan is 8.5h.UV index
May through August, with an average maximum UV index of 5, are months with the highest UV index. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for ordinary individuals.Note: The UV index of 5 in May translates into these instructions:
Take precautions - Protection against sunburn is recommended. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat. Guard yourself! Snow reflection can almost double the UV radiation from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Merrillan, WI
- Average high temperature in May: 64.9°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 (20.7°F).
- Average low temperature in May: 46.9°F
The month with the highest average low temperature is July (60.1°F).
The coldest month (with the lowest average low temperature) is January (7.3°F).
Average pressure in May
Merrillan, WI
- Average pressure in May: 29.95"Hg
The months with the highest atmospheric pressure are January and February (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in May
Merrillan, WI
- Average wind speed in May: 8.2mph
The windiest month (with the highest average wind speed) is April (9.4mph).
The calmest months (with the lowest average wind speed) are July and August (6.5mph).
Average humidity in May
Merrillan, WI
- Average humidity in May: 79%
The month with the highest relative humidity is January (91%).
The month with the lowest relative humidity is April (77%).
Average rainfall in May
Merrillan, WI
- Average rainfall in May: 2.13"
The wettest month (with the highest rainfall) is June (2.91").
The driest month (with the least rainfall) is January (0.51").
Average rainfall days in May
Merrillan, WI
- Average rainfall days in May: 15 days
The month with the highest number of rainy days is June (17.1 days).
The month with the least rainy days is February (2.8 days).
Average snowfall in May
Merrillan, WI
- Average snowfall in May: 0.04"
The month with the highest snowfall is February (2.99").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Merrillan, WI
- Average snowfall days in May: 0.5 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
Merrillan, WI
- Average daylight in May: 14h and 48min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in May: 8h and 30min
The month with the most sunshine is July (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 0min).
Average sunshine days in May
Merrillan, WI
- Average sunshine days in May: 13.2 days
The month with the most sunshine days is October (18.4 days).
The month with the least sunshine days is June (9.8 days).
Average UV index in May
Merrillan, 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, February, November and December (UV index 1).
Average cloud cover in May
Merrillan, WI
- Average cloud cover in May: 44
The month with the most cloud cover is January (Cloud cover 69).
The month with the least cloud cover is August (Cloud cover 33).
Average visibility in May
Merrillan, WI
- Average visibility in May: 6mi
The months with the highest visibility are April, May, June, October and November (6mi).
The months with the lowest visibility are January, February, March, July, August, September and December (5mi).
