December weather forecastPlatteville, WI
December
Weather in December
The first month of the winter, December, is still a freezing cold month in Platteville, Wisconsin, with an average temperature varying between 20.5°F (-6.4°C) and 30.9°F (-0.6°C).Temperature
The onset of December is marked by a decrease in temperature, transitioning from a chilly 43.3°F (6.3°C) in November to a freezing cold 30.9°F (-0.6°C). An average low-temperature of 20.5°F (-6.4°C) is noted during the nights in December.Humidity
The average relative humidity in December is 84%.Rainfall
In Platteville, during December, the rain falls for 6.8 days and regularly aggregates up to 1.46" (37mm) of precipitation. Throughout the year, there are 140.6 rainfall days, and 28.66" (728mm) of precipitation is accumulated.Snowfall
January through April, October through December are months with snowfall. In Platteville, in December, during 9.4 snowfall days, 3.43" (87mm) of snow is typically accumulated. In Platteville, during the entire year, snow falls for 47.9 days and aggregates up to 18.46" (469mm) 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 7:13 am and sunset at 4:29 pm. On the last day of the month, sunrise is at 7:32 am and sunset at 4:38 pm CST.
Sunshine
In Platteville, the average sunshine in December is 4h.UV index
The months with the lowest UV index are January, November and December, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a minimal health hazard from unsafe exposure to UV radiation for the ordinary person.Note: The maximum daily UV index of 1 in December interprets into the following recommendations:
Although prolonged sun exposure does not typically bother most people, children, babies, and those with sensitive skin should always have protection. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance. Stay alert! Snow's reflective properties can almost double the UV radiation from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Platteville, WI
- Average high temperature in December: 30.9°F
The warmest month (with the highest average high temperature) is July (79.5°F).
The month with the lowest average high temperature is January (24.1°F).
- Average low temperature in December: 20.5°F
The month with the highest average low temperature is July (62.6°F).
The coldest month (with the lowest average low temperature) is January (11.7°F).
Average pressure in December
Platteville, WI
- Average pressure in December: 30.1"Hg
The months with the highest atmospheric pressure are January and February (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in December
Platteville, WI
- Average wind speed in December: 9.5mph
The windiest month (with the highest average wind speed) is April (10.1mph).
The calmest month (with the lowest average wind speed) is August (6.6mph).
Average humidity in December
Platteville, WI
- Average humidity in December: 84%
The months with the highest relative humidity are January and February (88%).
The months with the lowest relative humidity are April and October (77%).
Average rainfall in December
Platteville, WI
- Average rainfall in December: 1.46"
The wettest month (with the highest rainfall) is June (4.02").
The driest month (with the least rainfall) is February (1.14").
Average rainfall days in December
Platteville, WI
- Average rainfall days in December: 6.8 days
The month with the highest number of rainy days is May (18.8 days).
The month with the least rainy days is February (4 days).
Average snowfall in December
Platteville, WI
- Average snowfall in December: 3.43"
The month with the highest snowfall is January (4.88").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Platteville, WI
- Average snowfall days in December: 9.4 days
The month with the highest number of snowfall days is January (13.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Platteville, 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: 4h and 0min
The month with the most sunshine is July (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).
Average sunshine days in December
Platteville, WI
- Average sunshine days in December: 17.2 days
The month with the most sunshine days is December (17.2 days).
The month with the least sunshine days is June (9.7 days).
Average UV index in December
Platteville, WI
- Average UV index in December: 1
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, November and December (UV index 1).
Average cloud cover in December
Platteville, WI
- Average cloud cover in December: 60
The month with the most cloud cover is January (Cloud cover 64).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility in December
Platteville, WI
- Average visibility in December: 6mi
The months with the highest visibility are March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, February, July and August (5mi).
