January weather forecast
Big Sky, MT

Vast fields and planted forests near the scenic mountainous region in Big Sky, Montana
Vast fields and planted forests near the scenic mountainous region in Big Sky, Montana

Weather in January

January, the same as December, in Big Sky, Montana, is a freezing cold winter month, with an average temperature ranging between min 9.9°F (-12.3°C) and max 25°F (-3.9°C).

Temperature

In Big Sky, the average high-temperature in January is almost the same as in December - a still subzero cold 25°F (-3.9°C). In Big Sky, in January, the average low-temperature is 9.9°F (-12.3°C).

Humidity

The months with the highest humidity in Big Sky, Montana, are January and February, with an average relative humidity of 90%.

Rainfall

In Big Sky, during January, the rain falls for 4.8 days and regularly aggregates up to 1.54" (39mm) of precipitation. Throughout the year, in Big Sky, there are 116.1 rainfall days, and 23.5" (597mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through December. In Big Sky, in January, during 18.9 snowfall days, 12.72" (323mm) of snow is typically accumulated. Throughout the year, in Big Sky, there are 151.6 snowfall days, and 124.06" (3151mm) of snow is accumulated.

Daylight

In Big Sky, the average length of the day in January is 9h and 13min.
On the first day of January in Big Sky, Montana, sunrise is at 8:04 am and sunset at 4:53 pm. On the last day of the month, sunrise is at 7:46 am and sunset at 5:31 pm MST.

Sunshine

With an average of 4.7h of sunshine, January has the least sunshine of the year.

UV index

The months with the lowest UV index are January and February, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a minimal health vulnerability from unsafe exposure to UV radiation for ordinary individuals.
Note: The daily maximum UV index of 1 in January interpret into the following advice:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. 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 temperature in January in Big Sky?

In Big Sky, in January, the average high-temperature is 25°F (-3.9°C), and the average low-temperature is 9.9°F (-12.3°C).

What is the most humid month in Big Sky?

The months with the highest humidity in Big Sky, Montana, are January and February, with an average relative humidity of 90%.

What is the average humidity in January in Big Sky?

The average relative humidity in January is 90%.

How many days does it rain in January in Big Sky?

In Big Sky, in January, it is raining for 4.8 days, with typically 1.54" (39mm) of accumulated precipitation.

How many days does it snow in January in Big Sky?

In Big Sky, Montana, during January, snow falls for 18.9 days and regularly aggregates up to 12.72" (323mm) of snow.

What is the average length of the day in January in Big Sky?

In January, the average day length in Big Sky, Montana, is 9h and 13min.

When are sunrise and sunset in January in Big Sky?

In January, on the first day of the month, sunrise is at 8:04 am and sunset at 4:53 pm. On the last day of the month, in Big Sky, sunrise is at 7:46 am and sunset at 5:31 pm MST.

What is the month with the least sunshine in Big Sky?

With an average of 4.7h of sunshine, January has the least sunshine of the year in Big Sky.

How long on average sun shines in January in Big Sky?

The average sunshine duration in January is 4.7h.

What are the months with the lowest UV index in Big Sky?

January and February, with an average maximum UV index of 1, are months with the lowest UV index in Big Sky.

How high is the UV index in January in Big Sky?

The average daily maximum UV index in January in Big Sky, Montana, 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 sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in January
Big Sky, MT

Average temperature in January - Big Sky, MT
  • Average high temperature in January: 25°F

The warmest month (with the highest average high temperature) is July (74.8°F).
The month with the lowest average high temperature is December (22.5°F).

  • Average low temperature in January: 9.9°F

The month with the highest average low temperature is August (45.1°F).
The coldest month (with the lowest average low temperature) is December (7.9°F).

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Average pressure in January
Big Sky, MT

Average pressure in January - Big Sky, MT
  • Average pressure in January: 30.22"Hg

The month with the highest atmospheric pressure is January (30.22"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

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Average wind speed in January
Big Sky, MT

Average wind speed in January - Big Sky, MT
  • Average wind speed in January: 7.1mph

The windiest month (with the highest average wind speed) is January (7.1mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).

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Average humidity in January
Big Sky, MT

Average humidity in January - Big Sky, MT
  • Average humidity in January: 90%

The months with the highest relative humidity are January and February (90%).
The month with the lowest relative humidity is August (51%).

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Average rainfall in January
Big Sky, MT

Average rainfall in January - Big Sky, MT
  • Average rainfall in January: 1.54"

The wettest months (with the highest rainfall) are April and May (2.91").
The driest month (with the least rainfall) is July (1.18").

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Average rainfall days in January
Big Sky, MT

Average rainfall days in January - Big Sky, MT
  • Average rainfall days in January: 4.8 days

The month with the highest number of rainy days is June (16.6 days).
The month with the least rainy days is February (4.3 days).

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Average snowfall in January
Big Sky, MT

Average snowfall in January - Big Sky, MT
  • Average snowfall in January: 12.72"

The month with the highest snowfall is April (19.88").
The month with the least snowfall is August (0.08").

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Average snowfall days in January
Big Sky, MT

Average snowfall days in January - Big Sky, MT
  • Average snowfall days in January: 18.9 days

The month with the highest number of snowfall days is March (21 days).
The month with the least snowfall days is August (0.3 days).

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Average daylight in January /
Average sunshine in January
Big Sky, MT

Average daylight in January / Average sunshine in January - Big Sky, MT
  • Average daylight in January: 9h and 13min

The month with the longest days is June (Average daylight: 15h and 35min).
The month with the shortest days is December (Average daylight: 8h and 49min).

  • Average sunshine in January: 4h and 42min

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

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Average sunshine days in January
Big Sky, MT

Average sunshine days in January - Big Sky, MT
  • Average sunshine days in January: 12.3 days

The month with the most sunshine days is September (14.5 days).
The month with the least sunshine days is May (5.7 days).

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Average UV index in January
Big Sky, MT

Average UV index in January - Big Sky, MT
  • Average UV index in January: 1

The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January and February (UV index 1).

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Average cloud cover in January
Big Sky, MT

Average cloud cover in January - Big Sky, MT
  • Average cloud cover in January: 55

The month with the most cloud cover is February (Cloud cover 60).
The month with the least cloud cover is July (Cloud cover 17).

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Average visibility in January
Big Sky, MT

Average visibility in January - Big Sky, MT
  • Average visibility in January: 4mi

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

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