Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
Merrillan's average high-temperature decreases in December, falling from a cold 40.6°F (4.8°C) in November to a subzero cold 26.4°F (-3.1°C). Throughout December, an average low-temperature of 15.4°F (-9.2°C) is experienced in Merrillan.Humidity
In Merrillan, the average relative humidity in December is 88%.Rainfall
In Merrillan, during December, the rain falls for 4 days and regularly aggregates up to 0.79" (20mm) of precipitation. 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. In Merrillan, in December, snow falls for 13.4 days, with typically accumulated 2.83" (72mm) of snow. Throughout the year, there are 62.1 snowfall days, and 13.11" (333mm) of snow is accumulated.Daylight
With an average of 8h and 54min of daylight, December has the shortest days of the year.On the first day of December in Merrillan, Wisconsin, sunrise is at 7:20 am and sunset at 4:25 pm. On the last day of the month, sunrise is at 7:39 am and sunset at 4:33 pm CST.
Sunshine
In December, the average sunshine is 3.2h.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 1. A UV Index of 2, and less, symbolizes a low threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In December, the average maximum UV index of 1 translates into the following recommendations:
While most individuals can withstand prolonged sun exposure, it is imperative that babies, children, and those with sensitive skin always be shielded. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration. 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
How cold is December in Merrillan?
What is the average humidity in December in Merrillan?
How many days does it rain in December?
How many days does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Merrillan have in December?
What time are sunrise and sunset in December?
How many hours of sunshine does Merrillan have in December?
What is the month with the lowest UV index?
How high is the UV index in December?
Average temperature in December
Merrillan, WI
- Average high temperature in December: 26.4°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 December: 15.4°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 December
Merrillan, WI
- Average pressure in December: 30.1"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 December
Merrillan, WI
- Average wind speed in December: 8.6mph
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 December
Merrillan, WI
- Average humidity in December: 88%
The month with the highest relative humidity is January (91%).
The month with the lowest relative humidity is April (77%).
Average rainfall in December
Merrillan, WI
- Average rainfall in December: 0.79"
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 December
Merrillan, WI
- Average rainfall days in December: 4 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 December
Merrillan, WI
- Average snowfall in December: 2.83"
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 December
Merrillan, WI
- Average snowfall days in December: 13.4 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 December /
Average sunshine in December
Merrillan, WI
- Average daylight in December: 8h and 5min
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 December: 3h and 1min
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 December
Merrillan, WI
- Average sunshine days in December: 16.9 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 December
Merrillan, WI
- Average UV index in December: 1
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 December
Merrillan, WI
- Average cloud cover in December: 67
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 December
Merrillan, WI
- Average visibility in December: 5mi
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).
Merrillan, Wisconsin, USA
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