December weather forecast
Casco, WI

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Weather in December

The first month of the winter, December, is also a subzero cold month in Casco, Wisconsin, with an average temperature varying between 31.1°F (-0.5°C) and 23°F (-5°C).

Temperature

Casco in December experiences a subtle temperature decline, with average high-temperatures reducing from an icy 42.3°F (5.7°C) in November to a subzero cold 31.1°F (-0.5°C). Casco experiences a minimal drop from daytime high temperatures, recording an average low-temperature of 23°F (-5°C) throughout December.

Humidity

In Casco, the average relative humidity in December is 83%.

Rainfall

In Casco, during December, the rain falls for 5.6 days and regularly aggregates up to 1.89" (48mm) of precipitation. Throughout the year, there are 132.6 rainfall days, and 25.55" (649mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through May, October through December. In Casco, Wisconsin, in December, snow falls for 13.1 days, with typically accumulated 3.82" (97mm) of snow. Throughout the year, in Casco, there are 59.4 snowfall days, and 18.94" (481mm) 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 the month, sunrise is at 7:07 am and sunset at 4:11 pm. On the last day of December, sunrise is at 7:27 am and sunset at 4:20 pm CST.

Sunshine

In Casco, Wisconsin, the average sunshine in December is 3.4h.

UV index

The months with the lowest UV index in Casco, Wisconsin, are January and December, with an average maximum UV index of 1. A UV Index value of 2, and less, symbolizes a low health risk from exposure to the Sun's UV radiation for ordinary individuals.
Note: The maximum UV index of 1 during December leads to these instructions:
Children, babies, and those with sensitive skin should always be shielded from long periods of sun exposure. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays. Pay attention! The reflection of snow can enhance the Sun's UV radiation almost double.
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Frequently asked questions

How cold is December in Casco?

Casco in December has an average high-temperature of 31.1°F (-0.5°C) and an average low-temperature of 23°F (-5°C).

What is the average humidity in December in Casco?

In Casco, Wisconsin, the average relative humidity in December is 83%.

How many days does it rain in December in Casco?

In Casco, Wisconsin, in December, it is raining for 5.6 days, with typically 1.89" (48mm) of accumulated precipitation.

How many days does it snow in December in Casco?

In December, in Casco, it is snowing for 13.1 days. Throughout December, 3.82" (97mm) of snow is accumulated.

What is the month with the shortest days in Casco?

December has the shortest days of the year, with an average of 8h and 54min of daylight.

How many hours of daylight does Casco have in December?

In Casco, the average day length in December is 8h and 53min.

What time are sunrise and sunset in December in Casco?

On the first day of December in Casco, sunrise is at 7:07 am and sunset at 4:11 pm. On the last day of the month, sunrise is at 7:27 am and sunset at 4:20 pm CST.

How long on average sun shines in December in Casco?

In December, the average sunshine duration in Casco is 3.4h.

What are the months with the lowest UV index in Casco?

The months with the lowest UV index in Casco are January and December, with an average maximum UV index of 1.

What is the UV index intensity in December in Casco?

The average daily maximum UV index in December in Casco is 1. A UV Index estimate of 2, and below, represents a low health risk from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Casco, WI

Average temperature in December - Casco, WI
  • Average high temperature in December: 31.1°F

The warmest month (with the highest average high temperature) is July (76.1°F).
The month with the lowest average high temperature is January (25°F).

  • Average low temperature in December: 23°F

The month with the highest average low temperature is July (61.9°F).
The coldest month (with the lowest average low temperature) is January (16.5°F).

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Average pressure in December
Casco, WI

Average pressure in December - Casco, WI
  • Average pressure in December: 30.06"Hg

The month with the highest atmospheric pressure is March (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

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Average wind speed in December
Casco, WI

Average wind speed in December - Casco, WI
  • Average wind speed in December: 12mph

The windiest month (with the highest average wind speed) is January (12.4mph).
The calmest month (with the lowest average wind speed) is July (8.1mph).

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Average humidity in December
Casco, WI

Average humidity in December - Casco, WI
  • Average humidity in December: 83%

The month with the highest relative humidity is January (85%).
The months with the lowest relative humidity are April and May (76%).

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Average rainfall in December
Casco, WI

Average rainfall in December - Casco, WI
  • Average rainfall in December: 1.89"

The wettest month (with the highest rainfall) is May (2.91").
The driest month (with the least rainfall) is February (1.38").

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Average rainfall days in December
Casco, WI

Average rainfall days in December - Casco, WI
  • Average rainfall days in December: 5.6 days

The month with the highest number of rainy days is May (15.3 days).
The months with the least rainy days are January and February (4.2 days).

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Average snowfall in December
Casco, WI

Average snowfall in December - Casco, WI
  • Average snowfall in December: 3.82"

The month with the highest snowfall is February (4.76").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in December
Casco, WI

Average snowfall days in December - Casco, WI
  • Average snowfall days in December: 13.1 days

The month with the highest number of snowfall days is January (14.7 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in December /
Average sunshine in December
Casco, WI

Average daylight in December / Average sunshine in December - Casco, 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 2min

The month with the most sunshine is July (Average sunshine: 10h and 18min).
The months with the least sunshine are January and February (Average sunshine: 3h and 12min).

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Average sunshine days in December
Casco, WI

Average sunshine days in December - Casco, WI
  • Average sunshine days in December: 13.3 days

The month with the most sunshine days is November (16.3 days).
The month with the least sunshine days is February (11 days).

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Average UV index in December
Casco, WI

Average UV index in December - Casco, 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 and December (UV index 1).

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Average cloud cover in December
Casco, WI

Average cloud cover in December - Casco, WI
  • Average cloud cover in December: 65

The month with the most cloud cover is January (Cloud cover 69).
The month with the least cloud cover is July (Cloud cover 29).

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Average visibility in December
Casco, WI

Average visibility in December - Casco, 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).

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Casco, Wisconsin, USA

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