December weather forecast
Circle, MT

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Weather in December

December, the first month of the winter in Circle, is also a subzero cold month, with an average temperature ranging between max 26.2°F (-3.2°C) and min 14.2°F (-9.9°C).

Temperature

The onset of December introduces a moderate change in Circle's weather, with average high-temperatures falling from November's wintry 40.5°F (4.7°C) to a subzero cold 26.2°F (-3.2°C). The average low-temperature of 14.2°F (-9.9°C) is witnessed during December.

Humidity

The average relative humidity in December in Circle is 82%.

Rainfall

In Circle, in December, it is raining for 4.1 days, with typically 0.59" (15mm) of accumulated precipitation. In Circle, during the entire year, the rain falls for 102.6 days and collects up to 13.35" (339mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall in Circle. In Circle, in December, snow falls for 11.5 days, with typically accumulated 2.95" (75mm) of snow. Throughout the year, in Circle, there are 58.7 snowfall days, and 17.28" (439mm) of snow is accumulated.

Daylight

The month with the shortest days in Circle is December, with an average of 8h and 30min of daylight.
On the first day of the month, sunrise is at 7:29 am and sunset at 4:13 pm. On the last day of December, sunrise is at 7:49 am and sunset at 4:21 pm MST.

Sunshine

The months with the least sunshine in Circle, Montana, are February and December, with an average of 4.9h of sunshine.

UV index

November and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index reading of 2, and below, represents a minimal health vulnerability from unsafe exposure to UV radiation for average individuals.
Note: The maximum UV index of 1 during December leads to these instructions:
Babies, children, and those with sensitive skin should always avoid extended periods in the sun. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat. Be alert! Nearly double the UV rays from the Sun can be reflected by snow.
Updated: Feb 13, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold is December in Circle?

The high-temperature, in December, in Circle, is 26.2°F (-3.2°C), while the low-temperature averages to 14.2°F (-9.9°C). In August, the average heat index (a.k.a. 'feels like', 'felt air temperature'), which factors the actual air temperature with the relative humidity, is computed to be 82.4°F (28°C).

What is the average humidity in December in Circle?

In Circle, the average relative humidity in December is 82%.

How much does it rain in Circle in December?

In Circle, in December, it is raining for 4.1 days, with typically 0.59" (15mm) of accumulated precipitation.

How much does it snow in Circle in December?

In Circle, in December, during 11.5 snowfall days, 2.95" (75mm) of snow is typically accumulated.

What is the month with the shortest days in Circle?

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

How many hours of daylight does Circle have in December?

In Circle, Montana, the average day length in December is 8h and 32min.

What time are sunrise and sunset in December in Circle?

On the first day of December in Circle, sunrise is at 7:29 am and sunset at 4:13 pm. On the last day of the month, sunrise is at 7:49 am and sunset at 4:21 pm MST.

What are the months with the least sunshine in Circle?

February and December, with an average of 4.9h of sunshine, are months with the least sunshine.

How long on average sun shines in December in Circle?

The average sunshine duration in December is 4.9h.

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

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

What is the UV index reading in December in Circle?

In Circle, the average daily maximum UV index in December is 1. A UV Index of 2, and less, symbolizes a low health risk 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
Circle, MT

Average temperature in December - Circle, MT
  • Average high temperature in December: 26.2°F

The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is January (25.5°F).

  • Average low temperature in December: 14.2°F

The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (12.6°F).

Average pressure in December
Circle, MT

Average pressure in December - Circle, MT
  • Average pressure in December: 30.14"Hg

The month with the highest atmospheric pressure is February (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.83"Hg).

Average wind speed in December
Circle, MT

Average wind speed in December - Circle, MT
  • Average wind speed in December: 10.2mph

The windiest month (with the highest average wind speed) is April (11.2mph).
The calmest month (with the lowest average wind speed) is August (9.3mph).

Average humidity in December
Circle, MT

Average humidity in December - Circle, MT
  • Average humidity in December: 82%

The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is August (43%).

Average rainfall in December
Circle, MT

Average rainfall in December - Circle, MT
  • Average rainfall in December: 0.59"

The wettest month (with the highest rainfall) is May (2.2").
The driest month (with the least rainfall) is January (0.51").

Average rainfall days in December
Circle, MT

Average rainfall days in December - Circle, MT
  • Average rainfall days in December: 4.1 days

The month with the highest number of rainy days is May (13.7 days).
The month with the least rainy days is February (4 days).

Average snowfall in December
Circle, MT

Average snowfall in December - Circle, MT
  • Average snowfall in December: 2.95"

The month with the highest snowfall is February (3.62").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in December
Circle, MT

Average snowfall days in December - Circle, MT
  • Average snowfall days in December: 11.5 days

The month with the highest number of snowfall days is January (12.9 days).
The months with the least snowfall days are July, August and September (0 days).

Average daylight in December /
Average sunshine in December
Circle, MT

Average daylight in December / Average sunshine in December - Circle, MT
  • 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: 4h and 5min

The month with the most sunshine is July (Average sunshine: 11h and 42min).
The months with the least sunshine are February and December (Average sunshine: 4h and 54min).

Average sunshine days in December
Circle, MT

Average sunshine days in December - Circle, MT
  • Average sunshine days in December: 17.5 days

The month with the most sunshine days is September (19.8 days).
The month with the least sunshine days is June (13.1 days).

Average UV index in December
Circle, MT

Average UV index in December - Circle, MT
  • Average UV index in December: 1

The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are November and December (UV index 1).

Average cloud cover in December
Circle, MT

Average cloud cover in December - Circle, MT
  • Average cloud cover in December: 48

The month with the most cloud cover is February (Cloud cover 49).
The months with the least cloud cover are July and August (Cloud cover 17).

Average visibility in December
Circle, MT

Average visibility in December - Circle, MT
  • Average visibility in December: 6mi

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

Circle, Montana, USA

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