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
Onset of December witnesses a reduction in the average high-temperature, falling from an icy 41.7°F (5.4°C) in November to a freezing cold 28.9°F (-1.7°C). Throughout December, Greenleaf anticipates an average low-temperature of 19.2°F (-7.1°C).Humidity
In Greenleaf, Wisconsin, the average relative humidity in December is 85%.Rainfall
In December, the rain falls for 6.3 days. Throughout December, 1.5" (38mm) of precipitation is accumulated. Throughout the year, there are 132.7 rainfall days, and 24.33" (618mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through April, October through December. The month with the most snowfall is December, when snow falls for 10.3 days and typically aggregates up to 4.09" (104mm) of snow.Daylight
With an average of 8h and 54min of daylight, December has the shortest days of the year.On the first day of December, sunrise is at 7:08 am and sunset at 4:14 pm. On the last day of the month, sunrise is at 7:28 am and sunset at 4:23 pm CST.
Sunshine
In Greenleaf, Wisconsin, the average sunshine in December is 3.8h.UV index
January, November and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV rays for the ordinary person.Note: In December, a daily maximum UV index of 1 leads to the following instructions:
While sun exposure does not greatly affect most, individuals with fair skin, babies, and children always need vigilant safeguarding. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. To cut down UV radiation exposure by about half, sport a wide-brim hat. Heads up! The UV radiation from the Sun can almost be doubled by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December?
What is the average humidity in December?
How many days does it rain in December?
When does it snow the most?
How many days does it snow in December?
What is the month with the shortest days?
What is the average length of the day in December?
When are sunrise and sunset in December in Greenleaf?
How long on average sun shines in December?
What is the month with the lowest UV index?
What is the UV index reading in December?
Average temperature in December
Greenleaf, WI
- Average high temperature in December: 28.9°F
The warmest month (with the highest average high temperature) is July (78.4°F).
The month with the lowest average high temperature is January (22.5°F).
- Average low temperature in December: 19.2°F
The month with the highest average low temperature is July (60.6°F).
The coldest month (with the lowest average low temperature) is January (11.8°F).
Average pressure in December
Greenleaf, WI
- Average pressure in December: 30.07"Hg
The months with the highest atmospheric pressure are February and March (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in December
Greenleaf, WI
- Average wind speed in December: 9.9mph
The windiest month (with the highest average wind speed) is January (10.1mph).
The calmest months (with the lowest average wind speed) are July and August (7.1mph).
Average humidity in December
Greenleaf, WI
- Average humidity in December: 85%
The months with the highest relative humidity are January and February (88%).
The month with the lowest relative humidity is April (76%).
Average rainfall in December
Greenleaf, WI
- Average rainfall in December: 1.5"
The wettest month (with the highest rainfall) is May (3.46").
The driest month (with the least rainfall) is January (0.98").
Average rainfall days in December
Greenleaf, WI
- Average rainfall days in December: 6.3 days
The month with the highest number of rainy days is July (17.3 days).
The month with the least rainy days is February (3.7 days).
Average snowfall in December
Greenleaf, WI
- Average snowfall in December: 4.09"
The month with the highest snowfall is December (4.09").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Greenleaf, WI
- Average snowfall days in December: 10.3 days
The month with the highest number of snowfall days is January (11.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Greenleaf, 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 5min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The months with the least sunshine are January and February (Average sunshine: 3h and 30min).
Average sunshine days in December
Greenleaf, WI
- Average sunshine days in December: 17.4 days
The month with the most sunshine days is November (18 days).
The month with the least sunshine days is July (10.7 days).
Average UV index in December
Greenleaf, 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, November and December (UV index 1).
Average cloud cover in December
Greenleaf, WI
- Average cloud cover in December: 62
The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is July (Cloud cover 31).
Average visibility in December
Greenleaf, WI
- Average visibility in December: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
Greenleaf, Wisconsin, USA
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