Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
Hillsboro's average high-temperature decreases in December, falling from a cold 41.5°F (5.3°C) in November to a freezing cold 28°F (-2.2°C). During the month of December, Hillsboro's nighttime temperature lowers to an average of 17.6°F (-8°C).Humidity
In December, the average relative humidity is 86%.Rainfall
In December, the rain falls for 5.6 days. Throughout December, 1.5" (38mm) of precipitation is accumulated. Throughout the year, in Hillsboro, there are 131.7 rainfall days, and 27.83" (707mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. In Hillsboro, in December, during 10.6 snowfall days, 3.98" (101mm) of snow is typically accumulated. In Hillsboro, during the entire year, snow falls for 50.2 days and aggregates up to 21.69" (551mm) of snow.Daylight
The month with the shortest days in Hillsboro, Wisconsin, is December, with an average of 9h and 0min of daylight.On the first day of the month, sunrise is at 7:15 am and sunset at 4:25 pm. On the last day of December, sunrise is at 7:34 am and sunset at 4:34 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. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to UV radiation for average individuals.Note: The maximum UV index of 1 during December leads to these instructions:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses. Be alert! Nearly double the UV rays from the Sun can be reflected by snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in December?
What is the average humidity in December?
How much does it rain in December?
How much does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Hillsboro have in December?
When is the sunrise / sunset in December?
How long on average sun shines in December?
What are the months with the lowest UV index?
What is the UV index intensity in December?
Average temperature in December
Hillsboro, 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
Hillsboro, 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
Hillsboro, 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
Hillsboro, 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
Hillsboro, 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
Hillsboro, 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
Hillsboro, 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
Hillsboro, 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
Hillsboro, 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 3min
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
Hillsboro, 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
Hillsboro, 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
Hillsboro, 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
Hillsboro, 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).
Hillsboro, Wisconsin, USA
Weather forecast for your location
2. Allow the app to use your location