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
As November transitions to December, the average high-temperature falls from a wintry 41.5°F (5.3°C) to a freezing cold 28.2°F (-2.1°C). During the nights in December, Greenville observes an average low-temperature of 18.5°F (-7.5°C).Humidity
In December, the average relative humidity is 85%.Rainfall
In December, the rain falls for 6.2 days. Throughout December, 1.46" (37mm) of precipitation is accumulated. Throughout the year, there are 131.1 rainfall days, and 24.45" (621mm) of precipitation is accumulated.Snowfall
Months with snowfall in Greenville are January through May, October through December. In Greenville, in December, snow falls for 11.4 days, with typically accumulated 4.33" (110mm) of snow. Throughout the year, there are 56.9 snowfall days, and 21.97" (558mm) of snow is accumulated.Daylight
December has the shortest days of the year in Greenville, with an average of 8h and 54min of daylight.On the first day of December in Greenville, sunrise is at 7:10 am and sunset at 4:16 pm. On the last day of the month, sunrise is at 7:29 am and sunset at 4:25 pm CST.
Sunshine
In Greenville, the average sunshine in December is 3.7h.UV index
January, November and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index reading of 2, and below, represents a minimal health hazard from exposure to the Sun's UV radiation for the ordinary person.Note: The maximum UV index of 1 during December translates into these guidelines:
Children, infants, and individuals with sensitive skin should be constantly protected from extended sun exposure. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage. Alert! The snow's reflection can amplify the UV radiation of the Sun nearly twice.
Frequently asked questions
How cold is December in Greenville?
What is the average humidity in December in Greenville?
How many days does it rain in December in Greenville?
How many days does it snow in December in Greenville?
What is the month with the shortest days in Greenville?
What is the average length of the day in December in Greenville?
What time are sunrise and sunset in December in Greenville?
How many hours of sunshine does Greenville have in December?
What is the month with the lowest UV index in Greenville?
What is the UV index reading in December in Greenville?
Average temperature in December
Greenville, WI
- Average high temperature in December: 28.2°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 (21.9°F).
- Average low temperature in December: 18.5°F
The month with the highest average low temperature is July (61.2°F).
The coldest month (with the lowest average low temperature) is January (10.8°F).
Average pressure in December
Greenville, WI
- Average pressure in December: 30.08"Hg
The months with the highest atmospheric pressure are January, February and March (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in December
Greenville, WI
- Average wind speed in December: 9.6mph
The windiest month (with the highest average wind speed) is April (9.9mph).
The calmest months (with the lowest average wind speed) are July and August (7.1mph).
Average humidity in December
Greenville, 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 (75%).
Average rainfall in December
Greenville, WI
- Average rainfall in December: 1.46"
The wettest month (with the highest rainfall) is May (3.54").
The driest month (with the least rainfall) is February (1.06").
Average rainfall days in December
Greenville, WI
- Average rainfall days in December: 6.2 days
The month with the highest number of rainy days is May (15.9 days).
The month with the least rainy days is January (3.9 days).
Average snowfall in December
Greenville, WI
- Average snowfall in December: 4.33"
The month with the highest snowfall is January (5.79").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Greenville, WI
- Average snowfall days in December: 11.4 days
The month with the highest number of snowfall days is January (14.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Greenville, 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 4min
The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 24min).
Average sunshine days in December
Greenville, WI
- Average sunshine days in December: 15.8 days
The month with the most sunshine days is September (16.4 days).
The month with the least sunshine days is April (11.8 days).
Average UV index in December
Greenville, 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
Greenville, 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 32).
Average visibility in December
Greenville, WI
- Average visibility in December: 5mi
The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February and December (5mi).
Greenville, Wisconsin, USA
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