December weather forecastGreenfield, WI
December
Weather in December
December greets Greenfield residents with cold weather and shorter daylight hours, clearly indicating winter's arrival. The city receives a respectable amount of snowfall, with the average count settling at 1.77" (45mm). This month is a time of winding down, cool winter mornings, and some respite from rainfall. Residents deck up their houses with Christmas lights, adding charm to the cold and dreamy December nights. Greenfield concludes the calendar year on a festive and frosty note, huddled up against the winter chill.Temperature
During Greenfield's transition into December, the average high-temperature lessens, moving from a frosty 43.7°F (6.5°C) in November to a wintry 32.4°F (0.2°C). Greenfield's average nighttime temperature in December modestly descends to a subzero cold 23.7°F (-4.6°C).Humidity
In December, the average relative humidity is 81%.Rainfall
February and December are months with the least rain when the rain falls for 5.9 days and typically aggregates up to 0.83" (21mm) of rain.Snowfall
Months with snowfall are January through April, October through December. In Greenfield, Wisconsin, in December, during 8.8 snowfall days, 1.77" (45mm) of snow is typically accumulated. In Greenfield, during the entire year, snow falls for 43.6 days and aggregates up to 11.22" (285mm) of snow.Daylight
The month with the shortest days is December, with an average of 9h and 6min of daylight.On the first day of December, sunrise is at 7:04 am and sunset at 4:18 pm. On the last day of the month, sunrise is at 7:23 am and sunset at 4:27 pm CST.
Sunshine
In December, the average sunshine is 3.9h.UV index
The months with the lowest UV index are January and December, with an average maximum UV index of 1. 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: The maximum UV index of 1 during December translates into these guidelines:
While most people are not greatly affected by extended sun exposure, those with fair skin, babies, and children must always have protection. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key. 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
Average temperature in December
Greenfield, WI
- Average high temperature in December: 32.4°F
The warmest month (with the highest average high temperature) is July (77.9°F).
The month with the lowest average high temperature is January (26.1°F).
- Average low temperature in December: 23.7°F
The month with the highest average low temperature is July (64.2°F).
The coldest month (with the lowest average low temperature) is January (16.2°F).
Average pressure in December
Greenfield, 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 (29.92"Hg).
Average wind speed in December
Greenfield, WI
- Average wind speed in December: 10.7mph
The windiest month (with the highest average wind speed) is January (11.4mph).
The calmest month (with the lowest average wind speed) is July (7.1mph).
Average humidity in December
Greenfield, WI
- Average humidity in December: 81%
The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is October (75%).
Average rainfall in December
Greenfield, WI
- Average rainfall in December: 0.83"
The wettest month (with the highest rainfall) is July (2.56").
The driest months (with the least rainfall) are February and December (0.83").
Average rainfall days in December
Greenfield, WI
- Average rainfall days in December: 5.9 days
The month with the highest number of rainy days is July (15.9 days).
The month with the least rainy days is February (3.3 days).
Average snowfall in December
Greenfield, WI
- Average snowfall in December: 1.77"
The month with the highest snowfall is January (3.03").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Greenfield, WI
- Average snowfall days in December: 8.8 days
The month with the highest number of snowfall days is January (11.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Greenfield, WI
- Average daylight in December: 9h and 6min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in December: 3h and 54min
The months with the most sunshine are July and August (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).
Average sunshine days in December
Greenfield, WI
- Average sunshine days in December: 17.2 days
The month with the most sunshine days is November (17.4 days).
The months with the least sunshine days are July and August (12.7 days).
Average UV index in December
Greenfield, WI
- Average UV index in December: 1
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in December
Greenfield, WI
- Average cloud cover in December: 61
The month with the most cloud cover is January (Cloud cover 64).
The months with the least cloud cover are July and August (Cloud cover 29).
Average visibility in December
Greenfield, WI
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
