December weather forecastPlain, WI
December
Weather in December
December, the first month of the winter in Plain, is also a subzero cold month, with an average temperature fluctuating between 18.9°F (-7.3°C) and 29.3°F (-1.5°C).Temperature
December's arrival coincides with a drop in the average high-temperature, decreasing from November's icy 42.6°F (5.9°C) to a freezing cold 29.3°F (-1.5°C). Throughout December, Plain registers a consistent average low-temperature of 18.9°F (-7.3°C).Humidity
In December, the average relative humidity in Plain is 85%.Rainfall
In December, the rain falls for 5.4 days. Throughout December, 0.71" (18mm) of precipitation is accumulated. Throughout the year, in Plain, Wisconsin, there are 122.9 rainfall days, and 17.76" (451mm) of precipitation is accumulated.Snowfall
January through April, October through December are months with snowfall in Plain. In Plain, during December, snow falls for 10.5 days and regularly aggregates up to 1.77" (45mm) of snow. Throughout the year, there are 51.6 snowfall days, and 12.17" (309mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 9h and 0min of daylight.On the first day of the month, sunrise is at 7:13 am and sunset at 4:25 pm. On the last day of December, in Plain, sunrise is at 7:32 am and sunset at 4:34 pm CST.
Sunshine
In December, the average sunshine in Plain is 3.7h.UV index
January, November and December, with an average maximum UV index of 1, are months with the lowest UV index in Plain. A UV Index value of 2, and less, symbolizes a minimal health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The UV index of 1 during December translates into the following guidance:
In contrast to children, who must always be shielded from the sun, most people can tolerate up to an hour of sun exposure without any burns. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck. Note well! The intensity of the Sun's UV rays can be nearly doubled by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Plain, WI
- Average high temperature in December: 29.3°F
The warmest month (with the highest average high temperature) is July (79.9°F).
The month with the lowest average high temperature is January (23.4°F).
- Average low temperature in December: 18.9°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°F).
Average pressure in December
Plain, WI
- Average pressure in December: 30.09"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in December
Plain, WI
- Average wind speed in December: 9.1mph
The windiest month (with the highest average wind speed) is April (9.6mph).
The calmest month (with the lowest average wind speed) is August (6.3mph).
Average humidity in December
Plain, WI
- Average humidity in December: 85%
The months with the highest relative humidity are January and February (89%).
The month with the lowest relative humidity is April (77%).
Average rainfall in December
Plain, WI
- Average rainfall in December: 0.71"
The wettest month (with the highest rainfall) is July (2.32").
The driest month (with the least rainfall) is January (0.63").
Average rainfall days in December
Plain, WI
- Average rainfall days in December: 5.4 days
The month with the highest number of rainy days is June (16.3 days).
The month with the least rainy days is January (3.2 days).
Average snowfall in December
Plain, WI
- Average snowfall in December: 1.77"
The month with the highest snowfall is February (2.91").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Plain, WI
- Average snowfall days in December: 10.5 days
The month with the highest number of snowfall days is February (13 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Plain, WI
- Average daylight in December: 9h and 0min
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 0min).
- Average sunshine in December: 3h and 42min
The month with the most sunshine is July (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 12min).
Average sunshine days in December
Plain, WI
- Average sunshine days in December: 17.3 days
The month with the most sunshine days is November (18.5 days).
The month with the least sunshine days is June (10.9 days).
Average UV index in December
Plain, WI
- Average UV index in December: 1
The months with the highest UV index are 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
Plain, WI
- Average cloud cover in December: 63
The month with the most cloud cover is January (Cloud cover 67).
The months with the least cloud cover are July and August (Cloud cover 34).
Average visibility in December
Plain, WI
- Average visibility in December: 6mi
The months with the highest visibility are March, April, May, June, October, November and December (6mi).
The months with the lowest visibility are January, February, July, August and September (5mi).
