December weather forecastDilly, WI
December
Weather in December
December, the first month of the winter in Dilly, is also a subzero cold month, with an average temperature ranging between max 28°F (-2.2°C) and min 17.6°F (-8°C).Temperature
The onset of December is marked by a decrease in temperature, transitioning from a wintry 41.5°F (5.3°C) in November to a subzero cold 28°F (-2.2°C). In Dilly, an average temperature of 17.6°F (-8°C) is noted during December nights.Humidity
The average relative humidity in December is 86%.Rainfall
In Dilly, in December, during 5.6 rainfall days, 1.5" (38mm) of precipitation is typically accumulated. In Dilly, during the entire year, the rain falls for 131.7 days and collects up to 27.83" (707mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. In December, in Dilly, it is snowing for 10.6 days. Throughout December, 3.98" (101mm) of snow is accumulated. In Dilly, during the entire year, snow falls for 50.2 days and aggregates up to 21.69" (551mm) of snow.Daylight
With an average of 9h and 0min of daylight, December has the shortest days of the year.On the first day of December in Dilly, sunrise is at 7:15 am and sunset at 4:26 pm. On the last day of the month, sunrise is at 7:35 am and sunset at 4:35 pm CST.
Sunshine
The average sunshine in December is 3.5h.UV index
January, February, November and December, with an average maximum UV index of 1, are months with the lowest UV index in Dilly, Wisconsin. A UV Index reading of 2, and below, represents a low threat to health from exposure to the Sun's UV radiation for the ordinary person.Note: In December, the average maximum UV index of 1 translates into the following recommendations:
Prolonged exposure to sunlight rarely troubles the majority, but constant protection is vital for babies, children, and fair-skinned people. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat. Note this! The Sun's UV radiation can nearly be doubled by the reflection off snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Dilly, WI
- Average high temperature in December: 28°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 (22.1°F).
- Average low temperature in December: 17.6°F
The month with the highest average low temperature is July (60.8°F).
The coldest month (with the lowest average low temperature) is January (9.3°F).
Average pressure in December
Dilly, WI
- Average pressure in December: 30.1"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
Dilly, WI
- Average wind speed in December: 8.9mph
The windiest month (with the highest average wind speed) is April (9.3mph).
The calmest month (with the lowest average wind speed) is August (6.4mph).
Average humidity in December
Dilly, WI
- Average humidity in December: 86%
The month with the highest relative humidity is January (90%).
The month with the lowest relative humidity is April (77%).
Average rainfall in December
Dilly, WI
- Average rainfall in December: 1.5"
The wettest month (with the highest rainfall) is June (4.17").
The driest month (with the least rainfall) is January (1.1").
Average rainfall days in December
Dilly, WI
- Average rainfall days in December: 5.6 days
The month with the highest number of rainy days is May (17.5 days).
The month with the least rainy days is January (3.5 days).
Average snowfall in December
Dilly, WI
- Average snowfall in December: 3.98"
The month with the highest snowfall is February (5.87").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Dilly, WI
- Average snowfall days in December: 10.6 days
The month with the highest number of snowfall days is January (12.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Dilly, 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 30min
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 0min).
Average sunshine days in December
Dilly, WI
- Average sunshine days in December: 17.5 days
The month with the most sunshine days is December (17.5 days).
The month with the least sunshine days is June (10.4 days).
Average UV index in December
Dilly, 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, February, November and December (UV index 1).
Average cloud cover in December
Dilly, WI
- Average cloud cover in December: 65
The month with the most cloud cover is January (Cloud cover 68).
The month with the least cloud cover is August (Cloud cover 33).
Average visibility in December
Dilly, WI
- Average visibility in December: 5mi
The months with the highest visibility are April, May, June, October and November (6mi).
The month with the lowest visibility is January (4mi).
