December weather forecast
La Salle, MT

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Weather in December

December, the first month of the winter in La Salle, is also a subzero cold month, with an average temperature varying between 25.9°F (-3.4°C) and 14.7°F (-9.6°C).

Temperature

In La Salle, the lowest average temperatures are observed in December, with a high of 25.9°F (-3.4°C) and a low of 14.7°F (-9.6°C).

Humidity

In December, the average relative humidity is 90%.

Rainfall

In December, the rain falls for 10.5 days. Throughout December, 1.65" (42mm) of precipitation is accumulated. Throughout the year, there are 142.8 rainfall days, and 17.36" (441mm) of precipitation is accumulated.

Snowfall

January through May, September through December are months with snowfall. In December, in La Salle, Montana, it is snowing for 21.5 days. Throughout December, 10.79" (274mm) of snow is accumulated. Throughout the year, there are 104.7 snowfall days, and 51.34" (1304mm) of snow is accumulated.

Daylight

With an average of 8h and 24min of daylight, December has the shortest days of the year.
On the first day of the month, sunrise is at 8:07 am and sunset at 4:44 pm. On the last day of December, sunrise is at 8:27 am and sunset at 4:52 pm MST.

Sunshine

The average sunshine in December in La Salle is 4.1h.

UV index

The months with the lowest UV index in La Salle 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 health risk from unsafe exposure to UV radiation for average individuals.
Note: A daily high UV index of 1 in December leads to these guidelines:
Extended sunlight exposure does not pose significant problems for most people, except for children, infants, and people with fair skin who always need shielding. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage. Take precaution! The reflection from snow can almost double the UV radiation of the Sun.
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Frequently asked questions

What month is the coldest in La Salle?

December, marked by an average high-temperature of 25.9°F (-3.4°C) and a low-temperature of 14.7°F (-9.6°C), is the coldest month in La Salle.

How cold is December in La Salle?

In La Salle, 25.9°F (-3.4°C) is the average high-temperature and 14.7°F (-9.6°C) is the average low-temperature during December.

What is the average humidity in December in La Salle?

The average relative humidity in December in La Salle is 90%.

How many days does it rain in December in La Salle?

In La Salle, Montana, during December, the rain falls for 10.5 days and regularly aggregates up to 1.65" (42mm) of precipitation.

How much does it snow in La Salle in December?

In December, in La Salle, it is snowing for 21.5 days. Throughout December, 10.79" (274mm) of snow is accumulated.

What is the month with the shortest days in La Salle?

The month with the shortest days is December, with an average of 8h and 24min of daylight.

How many hours of daylight does La Salle have in December?

In La Salle, Montana, the average day length in December is 8h and 25min.

What time are sunrise and sunset in December in La Salle?

In December, on the first day of the month, sunrise is at 8:07 am and sunset at 4:44 pm. On the last day of the month, in La Salle, Montana, sunrise is at 8:27 am and sunset at 4:52 pm MST.

How many hours of sunshine does La Salle have in December?

The average sunshine duration in December in La Salle is 4.1h.

When is the lowest UV index in La Salle?

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

What is the UV index intensity in December in La Salle?

In La Salle, Montana, the average daily maximum UV index in December is 1. A UV Index estimate of 2, and below, represents 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
La Salle, MT

Average temperature in December - La Salle, MT
  • Average high temperature in December: 25.9°F

The warmest month (with the highest average high temperature) is July (77.5°F).
The month with the lowest average high temperature is December (25.9°F).

  • Average low temperature in December: 14.7°F

The month with the highest average low temperature is August (46.4°F).
The coldest month (with the lowest average low temperature) is February (14.4°F).

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Average pressure in December
La Salle, MT

Average pressure in December - La Salle, MT
  • Average pressure in December: 30.15"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

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Average wind speed in December
La Salle, MT

Average wind speed in December - La Salle, MT
  • Average wind speed in December: 3.8mph

The windiest month (with the highest average wind speed) is April (4.7mph).
The calmest month (with the lowest average wind speed) is August (3.7mph).

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Average humidity in December
La Salle, MT

Average humidity in December - La Salle, MT
  • Average humidity in December: 90%

The month with the highest relative humidity is January (93%).
The month with the lowest relative humidity is August (55%).

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Average rainfall in December
La Salle, MT

Average rainfall in December - La Salle, MT
  • Average rainfall in December: 1.65"

The wettest month (with the highest rainfall) is June (2.05").
The driest month (with the least rainfall) is August (0.55").

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Average rainfall days in December
La Salle, MT

Average rainfall days in December - La Salle, MT
  • Average rainfall days in December: 10.5 days

The month with the highest number of rainy days is April (17.9 days).
The month with the least rainy days is August (6.6 days).

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Average snowfall in December
La Salle, MT

Average snowfall in December - La Salle, MT
  • Average snowfall in December: 10.79"

The month with the highest snowfall is January (11.3").
The months with the least snowfall are June, July and August (0").

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Average snowfall days in December
La Salle, MT

Average snowfall days in December - La Salle, MT
  • Average snowfall days in December: 21.5 days

The month with the highest number of snowfall days is December (21.5 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
La Salle, MT

Average daylight in December / Average sunshine in December - La Salle, MT
  • Average daylight in December: 8h and 2min

The month with the longest days is June (Average daylight: 16h and 0min).
The month with the shortest days is December (Average daylight: 8h and 24min).

  • Average sunshine in December: 4h and 1min

The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).

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Average sunshine days in December
La Salle, MT

Average sunshine days in December - La Salle, MT
  • Average sunshine days in December: 9.5 days

The month with the most sunshine days is August (21.8 days).
The month with the least sunshine days is February (6.8 days).

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Average UV index in December
La Salle, MT

Average UV index in December - La Salle, MT
  • Average UV index in December: 1

The month with the highest UV index is July (UV index 5).
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
La Salle, MT

Average cloud cover in December - La Salle, MT
  • Average cloud cover in December: 60

The month with the most cloud cover is January (Cloud cover 63).
The months with the least cloud cover are July and August (Cloud cover 15).

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Average visibility in December
La Salle, MT

Average visibility in December - La Salle, MT
  • Average visibility in December: 4mi

The months with the highest visibility are May, June, July, August, September and October (6mi).
The month with the lowest visibility is January (3mi).

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La Salle, Montana, USA

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