December weather forecast
Cass Lake, MN

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Weather in December

December, the first month of the winter in Cass Lake, is also a subzero cold month, with an average temperature fluctuating between 9.5°F (-12.5°C) and 20.3°F (-6.5°C).

Temperature

December's onset brings a clear reduction in the average high-temperature, falling from a wintry 34.7°F (1.5°C) in November to a freezing cold 20.3°F (-6.5°C). An average low-temperature of 9.5°F (-12.5°C) marks the nights throughout December.

Humidity

The average relative humidity in December in Cass Lake is 90%.

Rainfall

In Cass Lake, in December, it is raining for 2.2 days, with typically 1.02" (26mm) of accumulated precipitation. In Cass Lake, during the entire year, the rain falls for 105.3 days and collects up to 19.69" (500mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall. December is the month with the most snowfall in Cass Lake. Snow falls for 17.7 days and accumulates 7.28" (185mm) of snow.

Daylight

With an average of 8h and 30min of daylight, December has the shortest days of the year in Cass Lake.
On the first day of the month, sunrise is at 7:45 am and sunset at 4:29 pm. On the last day of December, sunrise is at 8:05 am and sunset at 4:37 pm CST.

Sunshine

The average sunshine in December in Cass Lake, Minnesota, is 2.4h.

UV index

The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 1. A UV Index value of 2, and less, symbolizes a low threat to health from unsafe exposure to UV radiation for the ordinary person.
Note: In December, the UV index of 1 transforms into the following advice:
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. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage. Take to heart! Snow reflection can almost magnify the Sun's UV radiation twofold.
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Frequently asked questions

How cold is it in Cass Lake in December?

December temperatures vary between a high-temperature of 20.3°F (-6.5°C) and a low-temperature of 9.5°F (-12.5°C).

What is the average humidity in December in Cass Lake?

In December, the average relative humidity in Cass Lake, Minnesota, is 90%.

How many days does it rain in December in Cass Lake?

In Cass Lake, Minnesota, in December, during 2.2 rainfall days, 1.02" (26mm) of precipitation is typically accumulated.

When does it snow the most in Cass Lake?

December is the month with the most snowfall. Snow falls for 17.7 days and accumulates 7.28" (185mm) of snow.

How much does it snow in Cass Lake in December?

In Cass Lake, Minnesota, in December, snow falls for 17.7 days, with typically accumulated 7.28" (185mm) of snow.

What is the month with the shortest days in Cass Lake?

With an average of 8h and 30min of daylight, December has the shortest days of the year.

How many hours of daylight does Cass Lake have in December?

In December, the average day length in Cass Lake is 8h and 32min.

When are sunrise and sunset in December in Cass Lake?

On the first day of December in Cass Lake, sunrise is at 7:45 am and sunset at 4:29 pm. On the last day of the month, sunrise is at 8:05 am and sunset at 4:37 pm CST.

How long on average sun shines in December in Cass Lake?

In Cass Lake, the average sunshine duration in December is 2.4h.

What are the months with the lowest UV index in Cass Lake?

January, February, November and December, with an average maximum UV index of 1, are months with the lowest UV index in Cass Lake, Minnesota.

How high is the UV index in December in Cass Lake?

The average daily maximum UV index in December is 1. A UV Index estimate of 2, and below, represents a low health threat from unsafe exposure to Sun's UV rays.
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
Cass Lake, MN

Average temperature in December - Cass Lake, MN
  • Average high temperature in December: 20.3°F

The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is January (16.2°F).

  • Average low temperature in December: 9.5°F

The month with the highest average low temperature is July (57.6°F).
The coldest month (with the lowest average low temperature) is January (1.6°F).

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Average pressure in December
Cass Lake, MN

Average pressure in December - Cass Lake, MN
  • Average pressure in December: 30.1"Hg

The month with the highest atmospheric pressure is February (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).

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Average wind speed in December
Cass Lake, MN

Average wind speed in December - Cass Lake, MN
  • Average wind speed in December: 7.5mph

The windiest month (with the highest average wind speed) is October (8.2mph).
The calmest month (with the lowest average wind speed) is August (6.9mph).

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Average humidity in December
Cass Lake, MN

Average humidity in December - Cass Lake, MN
  • Average humidity in December: 90%

The months with the highest relative humidity are January and February (93%).
The month with the lowest relative humidity is May (70%).

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Average rainfall in December
Cass Lake, MN

Average rainfall in December - Cass Lake, MN
  • Average rainfall in December: 1.02"

The wettest month (with the highest rainfall) is June (2.91").
The driest months (with the least rainfall) are January and February (0.75").

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Average rainfall days in December
Cass Lake, MN

Average rainfall days in December - Cass Lake, MN
  • Average rainfall days in December: 2.2 days

The month with the highest number of rainy days is June (16.5 days).
The month with the least rainy days is February (1.3 days).

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Average snowfall in December
Cass Lake, MN

Average snowfall in December - Cass Lake, MN
  • Average snowfall in December: 7.28"

The month with the highest snowfall is December (7.28").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in December
Cass Lake, MN

Average snowfall days in December - Cass Lake, MN
  • Average snowfall days in December: 17.7 days

The month with the highest number of snowfall days is January (18.7 days).
The months with the least snowfall days are June, July and August (0 days).

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Average daylight in December /
Average sunshine in December
Cass Lake, MN

Average daylight in December / Average sunshine in December - Cass Lake, MN
  • Average daylight in December: 8h and 3min

The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 30min).

  • Average sunshine in December: 2h and 2min

The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 2h and 0min).

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Average sunshine days in December
Cass Lake, MN

Average sunshine days in December - Cass Lake, MN
  • Average sunshine days in December: 14.5 days

The month with the most sunshine days is August (17.2 days).
The month with the least sunshine days is June (11.7 days).

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Average UV index in December
Cass Lake, MN

Average UV index in December - Cass Lake, MN
  • 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).

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Average cloud cover in December
Cass Lake, MN

Average cloud cover in December - Cass Lake, MN
  • Average cloud cover in December: 77

The month with the most cloud cover is January (Cloud cover 80).
The months with the least cloud cover are July and August (Cloud cover 34).

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Average visibility in December
Cass Lake, MN

Average visibility in December - Cass Lake, MN
  • Average visibility in December: 4mi

The months with the highest visibility are May, June, July, August and September (6mi).
The months with the lowest visibility are January, February, March and December (4mi).

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Cass Lake, Minnesota, USA

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