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 shift from November to December involves a decrease in the average high-temperature, dropping from a frosty 43°F (6.1°C) to a freezing cold 29.7°F (-1.3°C). An average low-temperature of 18.9°F (-7.3°C) marks the month of December in Seneca.Humidity
In December, the average relative humidity is 84%.Rainfall
In Seneca, in December, it is raining for 6.8 days, with typically 1.5" (38mm) of accumulated precipitation. In Seneca, during the entire year, the rain falls for 142.4 days and collects up to 28.66" (728mm) of precipitation.Snowfall
January through April, October through December are months with snowfall. In Seneca, in December, during 12.7 snowfall days, 4.21" (107mm) of snow is typically accumulated. In Seneca, during the entire year, snow falls for 60.2 days and aggregates up to 22.13" (562mm) of snow.Daylight
With an average of 9h and 0min of daylight, December has the shortest days of the year in Seneca.On the first day of December, sunrise is at 7:16 am and sunset at 4:29 pm. On the last day of the month, sunrise is at 7:35 am and sunset at 4:38 pm CST.
Sunshine
In Seneca, the average sunshine in December is 3.8h.UV index
January, November and December, with an average maximum UV index of 1, are months with the lowest UV index in Seneca. A UV Index estimate of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation for ordinary individuals.Note: The maximum daily UV index, 1 in December, converts into the following recommendations:
Prolonged exposure to sunlight rarely troubles the majority, but constant protection is vital for babies, children, and fair-skinned people. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. During bright days, sunglasses that offer UVA and UVB defense are recommended. Take note! UV radiation from the Sun can double in intensity due to snow reflection.
Frequently asked questions
How cold is it in Seneca in December?
What is the average humidity in December in Seneca?
How many days does it rain in December in Seneca?
How much does it snow in Seneca in December?
What is the month with the shortest days in Seneca?
What is the average length of the day in December in Seneca?
When is the sunrise / sunset in December in Seneca?
How long on average sun shines in December in Seneca?
When is the lowest UV index in Seneca?
What is the UV index reading in December in Seneca?
Average temperature in December
Seneca, WI
- Average high temperature in December: 29.7°F
The warmest month (with the highest average high temperature) is July (80.2°F).
The month with the lowest average high temperature is January (23.4°F).
- Average low temperature in December: 18.9°F
The month with the highest average low temperature is July (61.3°F).
The coldest month (with the lowest average low temperature) is January (9.9°F).
Average pressure in December
Seneca, WI
- Average pressure in December: 30.1"Hg
The months with the highest atmospheric pressure are January and February (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in December
Seneca, WI
- Average wind speed in December: 8.8mph
The windiest month (with the highest average wind speed) is April (9.4mph).
The calmest month (with the lowest average wind speed) is August (6.4mph).
Average humidity in December
Seneca, 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
Seneca, 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 (1.14").
Average rainfall days in December
Seneca, WI
- Average rainfall days in December: 6.8 days
The month with the highest number of rainy days is May (19.2 days).
The month with the least rainy days is February (4.3 days).
Average snowfall in December
Seneca, WI
- Average snowfall in December: 4.21"
The month with the highest snowfall is February (5.98").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Seneca, WI
- Average snowfall days in December: 12.7 days
The month with the highest number of snowfall days is January (15.7 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Seneca, WI
- Average daylight in December: 9h and 0min
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 0min).
- Average sunshine in December: 3h and 5min
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 24min).
Average sunshine days in December
Seneca, WI
- Average sunshine days in December: 14.8 days
The month with the most sunshine days is November (16.7 days).
The month with the least sunshine days is June (9.2 days).
Average UV index in December
Seneca, 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
Seneca, WI
- Average cloud cover in December: 62
The month with the most cloud cover is January (Cloud cover 66).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility in December
Seneca, 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).
Seneca, Wisconsin, USA
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