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
December's arrival coincides with a drop in the average high-temperature, decreasing from November's wintry 42.1°F (5.6°C) to a subzero cold 29.1°F (-1.6°C). Nighttime temperature experiences an average drop to 19°F (-7.2°C) in December.Humidity
The average relative humidity in December in Portage is 84%.Rainfall
In Portage, Wisconsin, in December, during 4.8 rainfall days, 1.38" (35mm) of precipitation is typically accumulated. In Portage, during the entire year, the rain falls for 128.9 days and collects up to 27.68" (703mm) of precipitation.Snowfall
January through May, October through December are months with snowfall in Portage. In Portage, in December, snow falls for 10.2 days, with typically accumulated 3.5" (89mm) of snow. In Portage, during the entire year, snow falls for 48.4 days and aggregates up to 20.28" (515mm) of snow.Daylight
The month with the shortest days in Portage is December, with an average of 9h and 0min of daylight.On the first day of December in Portage, sunrise is at 7:11 am and sunset at 4:22 pm. On the last day of the month, sunrise is at 7:30 am and sunset at 4:31 pm CST.
Sunshine
In Portage, the average sunshine in December is 3.7h.UV index
January, November and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: The maximum daily UV index, 1 in December, converts into the following recommendations:
While extended sun exposure does not significantly affect most people, those with sensitive skin, children, and infants should always be protected. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes. Guard yourself! Snow reflection can almost double the UV radiation from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December in Portage?
What is the average humidity in December in Portage?
How much does it rain in Portage in December?
How much does it snow in Portage in December?
What is the month with the shortest days in Portage?
What is the average length of the day in December in Portage?
When are sunrise and sunset in December in Portage?
How long on average sun shines in December in Portage?
When is the lowest UV index in Portage?
How high is the UV index in December in Portage?
Average temperature in December
Portage, WI
- Average high temperature in December: 29.1°F
The warmest month (with the highest average high temperature) is July (79°F).
The month with the lowest average high temperature is January (22.8°F).
- Average low temperature in December: 19°F
The month with the highest average low temperature is July (61°F).
The coldest month (with the lowest average low temperature) is January (10.6°F).
Average pressure in December
Portage, 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
Portage, WI
- Average wind speed in December: 9.2mph
The windiest month (with the highest average wind speed) is April (9.9mph).
The calmest month (with the lowest average wind speed) is August (6.6mph).
Average humidity in December
Portage, WI
- Average humidity in December: 84%
The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is April (76%).
Average rainfall in December
Portage, WI
- Average rainfall in December: 1.38"
The wettest month (with the highest rainfall) is June (3.82").
The driest month (with the least rainfall) is January (1.06").
Average rainfall days in December
Portage, WI
- Average rainfall days in December: 4.8 days
The month with the highest number of rainy days is June (16.8 days).
The month with the least rainy days is February (3.3 days).
Average snowfall in December
Portage, WI
- Average snowfall in December: 3.5"
The month with the highest snowfall is February (4.8").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Portage, WI
- Average snowfall days in December: 10.2 days
The month with the highest number of snowfall days is January (12 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Portage, 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 4min
The month with the most sunshine is July (Average sunshine: 9h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 6min).
Average sunshine days in December
Portage, WI
- Average sunshine days in December: 17.7 days
The month with the most sunshine days is November (17.8 days).
The month with the least sunshine days is June (10.9 days).
Average UV index in December
Portage, 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, November and December (UV index 1).
Average cloud cover in December
Portage, WI
- Average cloud cover in December: 64
The month with the most cloud cover is January (Cloud cover 67).
The months with the least cloud cover are July and August (Cloud cover 35).
Average visibility in December
Portage, WI
- Average visibility in December: 5mi
The months with the highest visibility are March, April, May, June, October and November (6mi).
The months with the lowest visibility are January, February, July, August, September and December (5mi).
Portage, Wisconsin, USA
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