December weather forecastPlymouth, WI
December
Weather in December
The first month of the winter, December, is also a subzero cold month in Plymouth, Wisconsin, with temperature in the range of an average high of 30.9°F (-0.6°C) and an average low of 21.6°F (-5.8°C).Temperature
December weather is marked by a drop in the average high-temperature, falling from an icy 41.9°F (5.5°C) in November to a freezing cold 30.9°F (-0.6°C). In Plymouth, December nights cool down to an average of 21.6°F (-5.8°C).Humidity
In December, the average relative humidity in Plymouth, Wisconsin, is 84%.Rainfall
In Plymouth, in December, it is raining for 5.7 days, with typically 1.57" (40mm) of accumulated precipitation. Throughout the year, there are 146 rainfall days, and 29.17" (741mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall. In December, it is snowing for 11.8 days. Throughout December, 4.45" (113mm) of snow is accumulated. Throughout the year, there are 56.2 snowfall days, and 20.16" (512mm) 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 December, sunrise is at 7:06 am and sunset at 4:15 pm. On the last day of the month, sunrise is at 7:25 am and sunset at 4:24 pm CST.
Sunshine
In Plymouth, the average sunshine in December is 3.8h.UV index
The months with the lowest UV index are January and December, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a minimal health vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: In December, a daily UV index of 1 turns into the following recommendations:
While most can endure approximately an hour in the sun without burning, children always require protection from sunlight. When the Sun is at its strongest around midday, find shade and limit exposure. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear. Consider carefully! The reflective quality of 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
Plymouth, WI
- Average high temperature in December: 30.9°F
The warmest month (with the highest average high temperature) is July (77.2°F).
The month with the lowest average high temperature is January (23.9°F).
- Average low temperature in December: 21.6°F
The month with the highest average low temperature is July (61.5°F).
The coldest month (with the lowest average low temperature) is January (13.8°F).
Average pressure in December
Plymouth, 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
Plymouth, WI
- Average wind speed in December: 10.7mph
The windiest month (with the highest average wind speed) is January (11.2mph).
The calmest month (with the lowest average wind speed) is July (7.3mph).
Average humidity in December
Plymouth, WI
- Average humidity in December: 84%
The months with the highest relative humidity are January and February (87%).
The month with the lowest relative humidity is April (77%).
Average rainfall in December
Plymouth, WI
- Average rainfall in December: 1.57"
The wettest month (with the highest rainfall) is May (3.58").
The driest month (with the least rainfall) is February (1.3").
Average rainfall days in December
Plymouth, WI
- Average rainfall days in December: 5.7 days
The month with the highest number of rainy days is May (17.8 days).
The month with the least rainy days is February (3.8 days).
Average snowfall in December
Plymouth, WI
- Average snowfall in December: 4.45"
The month with the highest snowfall is January (4.49").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Plymouth, WI
- Average snowfall days in December: 11.8 days
The month with the highest number of snowfall days is January (13.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Plymouth, WI
- Average daylight in December: 9h and 0min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in December: 3h and 48min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is February (Average sunshine: 3h and 30min).
Average sunshine days in December
Plymouth, WI
- Average sunshine days in December: 15.8 days
The month with the most sunshine days is December (15.8 days).
The month with the least sunshine days is July (10.1 days).
Average UV index in December
Plymouth, 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 and December (UV index 1).
Average cloud cover in December
Plymouth, WI
- Average cloud cover in December: 62
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 30).
Average visibility in December
Plymouth, WI
- Average visibility in December: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January and February (5mi).
