December weather forecast
Glasgow, MT

Weather in December

December, the first month of the winter in Glasgow, is also a subzero cold month, with an average temperature fluctuating between 12.7°F (-10.7°C) and 24.6°F (-4.1°C).

Temperature

In December, the average high-temperature drops from a wintry 38.3°F (3.5°C) in November to a subzero cold 24.6°F (-4.1°C). In December, the average low-temperature is 12.7°F (-10.7°C).

Humidity

In December, the average relative humidity in Glasgow, Montana, is 84%.

Rainfall

In Glasgow, during 3 rainfall days, 0.43" (11mm) of precipitation is typically accumulated. Throughout the year, in Glasgow, there are 90.8 rainfall days, and 11.1" (282mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through May, October through December. The month with the most snowfall is December, when snow falls for 8.6 days and typically aggregates up to 2.6" (66mm) of snow.

Daylight

With an average of 8h and 26min of daylight, December has the shortest days of the year in Glasgow.
On the first day of December in Glasgow, sunrise is at 7:36 am and sunset at 4:15 pm. On the last day of the month, sunrise is at 7:57 am and sunset at 4:22 pm MST.

Sunshine

In Glasgow, the average sunshine in December is 4.9h.

UV index

With an average maximum UV index of 1, December is the month with the lowest UV index. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The daily maximum UV index of 1 in December interpret 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. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the average humidity in December in Glasgow?

In Glasgow, Montana, the average relative humidity in December is 84%.

How many days does it rain in December in Glasgow?

In Glasgow, Montana, during December, the rain falls for 3 days and regularly aggregates up to 0.43" (11mm) of precipitation.

What is the snowiest month in Glasgow?

The month with the most snowfall in Glasgow is December, when snow falls for 8.6 days and typically aggregates up to 2.6" (66mm) of snow.

How much does it snow in Glasgow in December?

In Glasgow, during December, snow falls for 8.6 days and regularly aggregates up to 2.6" (66mm) of snow.

What is the month with the shortest days in Glasgow?

December has the shortest days of the year in Glasgow, Montana, with an average of 8h and 26min of daylight.

How many hours of daylight does Glasgow have in December?

In Glasgow, Montana, the average day length in December is 8h and 26min.

When is the sunrise / sunset in December in Glasgow?

In December, on the first day of the month, sunrise is at 7:36 am and sunset at 4:15 pm. On the last day of the month, in Glasgow, Montana, sunrise is at 7:57 am and sunset at 4:22 pm MST.

How long on average sun shines in December in Glasgow?

In December, the average sunshine duration in Glasgow, Montana, is 4.9h.

What is the month with the lowest UV index in Glasgow?

With an average maximum UV index of 1, December is the month with the lowest UV index in Glasgow.

What is the UV index reading in December in Glasgow?

In December, the average daily maximum UV index 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
Glasgow, MT

Average temperature in December - Glasgow, MT
  • Average high temperature in December: 24.6°F

The warmest month (with the highest average high temperature) is July (83.1°F).
The month with the lowest average high temperature is February (23.7°F).

  • Average low temperature in December: 12.7°F

The month with the highest average low temperature is July (63.3°F).
The coldest month (with the lowest average low temperature) is February (10.2°F).

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Average pressure in December
Glasgow, MT

Average pressure in December - Glasgow, MT
  • Average pressure in December: 30.13"Hg

The month with the highest atmospheric pressure is February (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.83"Hg).

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Average wind speed in December
Glasgow, MT

Average wind speed in December - Glasgow, MT
  • Average wind speed in December: 9.3mph

The windiest month (with the highest average wind speed) is April (11.7mph).
The calmest month (with the lowest average wind speed) is February (8.8mph).

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Average humidity in December
Glasgow, MT

Average humidity in December - Glasgow, MT
  • Average humidity in December: 84%

The month with the highest relative humidity is January (86%).
The month with the lowest relative humidity is August (42%).

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Average rainfall in December
Glasgow, MT

Average rainfall in December - Glasgow, MT
  • Average rainfall in December: 0.43"

The wettest month (with the highest rainfall) is June (2.01").
The driest months (with the least rainfall) are January and February (0.35").

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Average rainfall days in December
Glasgow, MT

Average rainfall days in December - Glasgow, MT
  • Average rainfall days in December: 3 days

The month with the highest number of rainy days is May (13.8 days).
The month with the least rainy days is February (2.3 days).

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Average snowfall in December
Glasgow, MT

Average snowfall in December - Glasgow, MT
  • Average snowfall in December: 2.6"

The month with the highest snowfall is December (2.6").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in December
Glasgow, MT

Average snowfall days in December - Glasgow, MT
  • Average snowfall days in December: 8.6 days

The month with the highest number of snowfall days is February (9.2 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
Glasgow, MT

Average daylight in December / Average sunshine in December - Glasgow, MT
  • Average daylight in December: 8h and 26min

The month with the longest days is June (Average daylight: 16h and 1min).
The month with the shortest days is December (Average daylight: 8h and 26min).

  • Average sunshine in December: 4h and 54min

The month with the most sunshine is July (Average sunshine: 11h and 48min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).

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Average sunshine days in December
Glasgow, MT

Average sunshine days in December - Glasgow, MT
  • Average sunshine days in December: 20.4 days

The month with the most sunshine days is November (21.5 days).
The month with the least sunshine days is June (13.8 days).

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Average UV index in December
Glasgow, MT

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

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

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Average cloud cover in December
Glasgow, MT

Average cloud cover in December - Glasgow, MT
  • Average cloud cover in December: 47

The month with the most cloud cover is February (Cloud cover 49).
The month with the least cloud cover is July (Cloud cover 16).

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Average visibility in December
Glasgow, MT

Average visibility in December - Glasgow, 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).

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