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
The onset of December comes with a shift in the average high-temperature, falling from a wintry 41.7°F (5.4°C) in November to a freezing cold 28.6°F (-1.9°C). Nighttime temperatures hover around an average low of 18.9°F (-7.3°C) in December.Humidity
In December, the average relative humidity is 86%.Rainfall
In Seymour, in December, it is raining for 6.1 days, with typically 1.65" (42mm) of accumulated precipitation. Throughout the year, there are 125.3 rainfall days, and 24.84" (631mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. In Seymour, Wisconsin, during December, snow falls for 11.9 days and regularly aggregates up to 4.09" (104mm) of snow. Throughout the year, there are 55.6 snowfall days, and 22.28" (566mm) of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 8h and 54min of daylight.On the first day of December, sunrise is at 7:10 am and sunset at 4:14 pm. On the last day of the month, sunrise is at 7:29 am and sunset at 4:23 pm CST.
Sunshine
In December, the average sunshine is 3.6h.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 of 2, and less, symbolizes a minimal health hazard from unsafe exposure to UV radiation for the average person.Note: In December, the maximum UV index of 1 suggests this advice:
The majority are not significantly affected by prolonged sun exposure. Infants, children, and those with fair skin must always have protection. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration. Warning! The reflection from snow can nearly magnify the Sun's UV radiation twofold.
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 many days does it rain in December in Seymour?
How much does it snow in December?
What is the month with the shortest days?
What is the average length of the day in December?
When is the sunrise / sunset in December?
How long on average sun shines in December?
What is the month with the lowest UV index?
What is the UV index reading in December?
Average temperature in December
Seymour, WI
- Average high temperature in December: 28.6°F
The warmest month (with the highest average high temperature) is July (78.8°F).
The month with the lowest average high temperature is January (22.5°F).
- Average low temperature in December: 18.9°F
The month with the highest average low temperature is July (60.1°F).
The coldest month (with the lowest average low temperature) is January (11.7°F).
Average pressure in December
Seymour, WI
- Average pressure in December: 30.07"Hg
The months with the highest atmospheric pressure are February and March (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in December
Seymour, WI
- Average wind speed in December: 9.6mph
The windiest months (with the highest average wind speed) are January, February and April (9.8mph).
The calmest months (with the lowest average wind speed) are July and August (7.1mph).
Average humidity in December
Seymour, WI
- Average humidity in December: 86%
The months with the highest relative humidity are January and February (88%).
The months with the lowest relative humidity are April and May (76%).
Average rainfall in December
Seymour, WI
- Average rainfall in December: 1.65"
The wettest month (with the highest rainfall) is May (3.54").
The driest month (with the least rainfall) is January (1.14").
Average rainfall days in December
Seymour, WI
- Average rainfall days in December: 6.1 days
The month with the highest number of rainy days is May (14.8 days).
The month with the least rainy days is February (3.2 days).
Average snowfall in December
Seymour, WI
- Average snowfall in December: 4.09"
The month with the highest snowfall is February (5.63").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Seymour, WI
- Average snowfall days in December: 11.9 days
The month with the highest number of snowfall days is January (13.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Seymour, WI
- Average daylight in December: 8h and 5min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in December: 3h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 0min).
The months with the least sunshine are January and February (Average sunshine: 3h and 24min).
Average sunshine days in December
Seymour, WI
- Average sunshine days in December: 16.1 days
The month with the most sunshine days is November (16.9 days).
The month with the least sunshine days is April (13.2 days).
Average UV index in December
Seymour, WI
- Average UV index in December: 1
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January, November and December (UV index 1).
Average cloud cover in December
Seymour, WI
- Average cloud cover in December: 63
The month with the most cloud cover is January (Cloud cover 64).
The months with the least cloud cover are July and August (Cloud cover 33).
Average visibility in December
Seymour, WI
- Average visibility in December: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
Seymour, Wisconsin, USA
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