Contents
- Weather in May
- Frequently asked questions
- Average temperature in May
- Average pressure in May
- Average wind speed in May
- Average humidity in May
- Average rainfall in May
- Average rainfall days in May
- Average snowfall in May
- Average snowfall days in May
- Average daylight in May
- Average sunshine in May
- Average sunshine days in May
- Average UV index in May
- Average cloud cover in May
- Average visibility in May
Weather in May
Temperature
A clear escalation in the average high-temperature is witnessed with the onset of May, advancing from a chilly 48.6°F (9.2°C) in April to a refreshing 64°F (17.8°C). During May, Merrill witnesses a consistent average low-temperature of 44.1°F (6.7°C).Humidity
With an average relative humidity of 75%, May is the least humid month in Merrill.Rainfall
May is the month with the most rainfall. Rain falls for 15.8 days and accumulates 2.28" (58mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. May is the last month it regularly snows in Merrill. During 0.7 snowfall days, in May, Merrill aggregates 0.35" (9mm) of snow. In Merrill, Wisconsin, during the entire year, snow falls for 89.8 days and aggregates up to 23.58" (599mm) of snow.Daylight
The average length of the day in May is 14h and 53min.On the first day of the month, sunrise is at 5:46 am and sunset at 8:05 pm. On the last day of May, sunrise is at 5:14 am and sunset at 8:38 pm CDT.
Sunshine
In May, the average sunshine is 8.5h.UV index
In May, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for ordinary individuals.Note: A daily maximum UV index of 4 in May translates into the following instructions:
Preventative actions are necessary - Recommendations to ward off sunburn are given. The solar radiation around mid-day is intense; avoid the Sun and stay safe. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key. Note this! The Sun's UV radiation can nearly be doubled by the reflection off snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are May temperatures?
What is the least humid month?
What is the average humidity in May?
What is the rainiest month?
How many days does it rain in May?
What is the last month it snows?
What is the average length of the day in May?
When are sunrise and sunset in May?
How many hours of sunshine does Merrill have in May?
How high is the UV index in May?
Average temperature in May
Merrill, WI
- Average high temperature in May: 64°F
The warmest month (with the highest average high temperature) is July (77.5°F).
The month with the lowest average high temperature is January (19.2°F).
- Average low temperature in May: 44.1°F
The month with the highest average low temperature is July (57.9°F).
The coldest month (with the lowest average low temperature) is January (7.9°F).
Average pressure in May
Merrill, WI
- Average pressure in May: 29.96"Hg
The month with the highest atmospheric pressure is February (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in May
Merrill, WI
- Average wind speed in May: 8.2mph
The windiest month (with the highest average wind speed) is April (9mph).
The calmest month (with the lowest average wind speed) is August (6.8mph).
Average humidity in May
Merrill, WI
- Average humidity in May: 75%
The months with the highest relative humidity are January and February (92%).
The month with the lowest relative humidity is May (75%).
Average rainfall in May
Merrill, WI
- Average rainfall in May: 2.28"
The wettest month (with the highest rainfall) is May (2.28").
The driest months (with the least rainfall) are January and February (0.79").
Average rainfall days in May
Merrill, WI
- Average rainfall days in May: 15.8 days
The months with the highest number of rainy days are May and June (15.8 days).
The month with the least rainy days is January (3.9 days).
Average snowfall in May
Merrill, WI
- Average snowfall in May: 0.35"
The month with the highest snowfall is January (4.76").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Merrill, WI
- Average snowfall days in May: 0.7 days
The month with the highest number of snowfall days is January (20.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Merrill, WI
- Average daylight in May: 14h and 5min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in May: 8h and 3min
The month with the most sunshine is July (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 2h and 36min).
Average sunshine days in May
Merrill, WI
- Average sunshine days in May: 11.8 days
The month with the most sunshine days is September (15.7 days).
The month with the least sunshine days is April (10.3 days).
Average UV index in May
Merrill, WI
- Average UV index in May: 4
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February and December (UV index 1).
Average cloud cover in May
Merrill, WI
- Average cloud cover in May: 46
The month with the most cloud cover is January (Cloud cover 75).
The months with the least cloud cover are July and August (Cloud cover 37).
Average visibility in May
Merrill, WI
- Average visibility in May: 6mi
The months with the highest visibility are April, May, June and October (6mi).
The months with the lowest visibility are January and February (4mi).
Merrill, Wisconsin, USA
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