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
Start of December in Merrillan brings a shift in the average high-temperature, falling from November's cold 40.6°F (4.8°C) to a freezing cold 26.4°F (-3.1°C). Merrillan's temperature drops to an average low of 15.4°F (-9.2°C) during the nights of December.Humidity
In December, the average relative humidity in Merrillan is 88%.Rainfall
In Merrillan, Wisconsin, in December, during 4 rainfall days, 0.79" (20mm) of precipitation is typically accumulated. In Merrillan, during the entire year, the rain falls for 120.8 days and collects up to 16.34" (415mm) of precipitation.Snowfall
January through May, October through December are months with snowfall in Merrillan. In Merrillan, in December, snow falls for 13.4 days, with typically accumulated 2.83" (72mm) of snow. In Merrillan, during the entire year, snow falls for 62.1 days and aggregates up to 13.11" (333mm) of snow.Daylight
With an average of 8h and 54min of daylight, December has the shortest days of the year in Merrillan.On the first day of December, 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
The average sunshine in December is 3.2h.UV index
January, February, November and December, with an average maximum UV index of 1, are months with the lowest UV index in Merrillan. A UV Index of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV radiation for the ordinary person.Note: In December, a daily maximum UV index of 1 leads to the following instructions:
The majority are not significantly affected by prolonged sun exposure. Infants, children, and those with fair skin must always have protection. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
Frequently asked questions
How cold is it in Merrillan in December?
What is the average humidity in December in Merrillan?
How many days does it rain in December in Merrillan?
How many days does it snow in December in Merrillan?
What is the month with the shortest days in Merrillan?
What is the average length of the day in December in Merrillan?
When are sunrise and sunset in December in Merrillan?
How many hours of sunshine does Merrillan have in December?
What is the month with the lowest UV index in Merrillan?
What is the UV index intensity in December in Merrillan?
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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