December weather forecastMonticello, WI
December
Weather in December
December, the first month of the winter in Monticello, is also a subzero cold month, with an average temperature ranging between max 30.7°F (-0.7°C) and min 20.8°F (-6.2°C).Temperature
December's arrival correlates with a reduction in the average high-temperature, down from a chilly 42.8°F (6°C) in November to a subzero cold 30.7°F (-0.7°C). Monticello in December anticipates an average nighttime temperature of 20.8°F (-6.2°C).Humidity
In December, the average relative humidity is 84%.Rainfall
In Monticello, in December, during 5.8 rainfall days, 0.71" (18mm) of precipitation is typically accumulated. Throughout the year, there are 124.7 rainfall days, and 15.16" (385mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall. In Monticello, during December, snow falls for 9.4 days and regularly aggregates up to 1.34" (34mm) of snow. Throughout the year, there are 48 snowfall days, and 10.43" (265mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 9h and 6min of daylight.On the first day of the month, sunrise is at 7:09 am and sunset at 4:25 pm. On the last day of December, sunrise is at 7:28 am and sunset at 4:34 pm CST.
Sunshine
In December, the average sunshine is 3.9h.UV index
January, November and December, with an average maximum UV index of 1, are months with the lowest UV index in Monticello. A UV Index of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV rays for ordinary individuals.Note: The daily high UV index of 1 during December translates into the following recommendations:
Most individuals face no significant issues with extended sun exposure, but it is always essential to protect children, babies, and those with sensitive skin. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear. Be advised! The UV radiation from the Sun can be almost doubled due to the reflective properties of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Monticello, WI
- Average high temperature in December: 30.7°F
The warmest month (with the highest average high temperature) is July (79°F).
The month with the lowest average high temperature is January (24.4°F).
- Average low temperature in December: 20.8°F
The month with the highest average low temperature is July (61.9°F).
The coldest month (with the lowest average low temperature) is January (11.7°F).
Average pressure in December
Monticello, WI
- Average pressure in December: 30.09"Hg
The months with the highest atmospheric pressure are January and February (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in December
Monticello, 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
Monticello, WI
- Average humidity in December: 84%
The month with the highest relative humidity is January (89%).
The months with the lowest relative humidity are April and October (77%).
Average rainfall in December
Monticello, WI
- Average rainfall in December: 0.71"
The wettest month (with the highest rainfall) is June (2.32").
The driest month (with the least rainfall) is January (0.55").
Average rainfall days in December
Monticello, WI
- Average rainfall days in December: 5.8 days
The month with the highest number of rainy days is May (16.8 days).
The month with the least rainy days is February (3.5 days).
Average snowfall in December
Monticello, WI
- Average snowfall in December: 1.34"
The months with the highest snowfall are January and February (2.52").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Monticello, WI
- Average snowfall days in December: 9.4 days
The month with the highest number of snowfall days is January (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
Monticello, 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 month with the most sunshine is July (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 24min).
Average sunshine days in December
Monticello, WI
- Average sunshine days in December: 18.6 days
The month with the most sunshine days is November (20.5 days).
The month with the least sunshine days is June (10.3 days).
Average UV index in December
Monticello, WI
- Average UV index in December: 1
The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January, November and December (UV index 1).
Average cloud cover in December
Monticello, WI
- Average cloud cover in December: 61
The month with the most cloud cover is January (Cloud cover 65).
The months with the least cloud cover are August and September (Cloud cover 34).
Average visibility in December
Monticello, WI
- Average visibility in December: 6mi
The months with the highest visibility are February, March, April, May, June, October, November and December (6mi).
The months with the lowest visibility are January, July, August and September (5mi).
