January weather forecast
West Yellowstone, MT

Weather in January

January, like December, is a freezing cold winter month in West Yellowstone, Montana, with temperature in the range of an average high of 21.9°F (-5.6°C) and an average low of 6.1°F (-14.4°C).

Temperature

In West Yellowstone, the average high-temperature in January is relatively the same as in December - a still freezing cold 21.9°F (-5.6°C). In January, the average low-temperature is 6.1°F (-14.4°C).

Humidity

The average relative humidity in January in West Yellowstone is 94%.

Rainfall

In West Yellowstone, in January, during 2.2 rainfall days, 2.09" (53mm) of precipitation is typically accumulated. Throughout the year, in West Yellowstone, there are 109.2 rainfall days, and 23.15" (588mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through July, September through December. In January, it is snowing for 22.8 days. Throughout January, 17.36" (441mm) of snow is accumulated. In West Yellowstone, during the entire year, snow falls for 159.3 days and aggregates up to 120.47" (3060mm) of snow.

Daylight

The average length of the day in January is 9h and 17min.
On the first day of January, sunrise is at 8:01 am and sunset at 4:54 pm. On the last day of the month, sunrise is at 7:44 am and sunset at 5:31 pm MST.

Sunshine

The months with the least sunshine in West Yellowstone are January, February and December, with an average of 3.3h of sunshine.

UV index

January through April, October through December, with an average maximum UV index of 1, are months with the lowest UV index. 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 January, the average maximum UV index of 1 translate into the following recommendations:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. 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 West Yellowstone?

The average high-temperature, in January, is 21.9°F (-5.6°C), while the average low-temperature is 6.1°F (-14.4°C).

What is the average humidity in January in West Yellowstone?

The average relative humidity in January in West Yellowstone is 94%.

How much does it rain in West Yellowstone in January?

In January, the rain falls for 2.2 days. Throughout January, 2.09" (53mm) of precipitation is accumulated.

How many days does it snow in January in West Yellowstone?

In West Yellowstone, Montana, in January, snow falls for 22.8 days, with typically accumulated 17.36" (441mm) of snow.

How many hours of daylight does West Yellowstone have in January?

In West Yellowstone, the average day length in January is 9h and 17min.

When is the sunrise / sunset in January in West Yellowstone?

In January, on the first day of the month, sunrise is at 8:01 am and sunset at 4:54 pm. On the last day of the month, in West Yellowstone, Montana, sunrise is at 7:44 am and sunset at 5:31 pm MST.

What is the month with the least sunshine in West Yellowstone?

January, February and December, with an average of 3.3h of sunshine, are months with the least sunshine in West Yellowstone.

How long on average sun shines in January in West Yellowstone?

In West Yellowstone, the average sunshine duration in January is 3.3h.

What are the months with the lowest UV index in West Yellowstone?

The months with the lowest UV index in West Yellowstone, Montana, are January through April, October through December, with an average maximum UV index of 1.

What is the UV index reading in January in West Yellowstone?

In West Yellowstone, the average daily maximum UV index in January is 1. A UV Index of 2, and less, symbolizes a low health threat from unprotected exposure to UV radiation.
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
West Yellowstone, MT

Average temperature in January - West Yellowstone, MT
  • Average high temperature in January: 21.9°F

The warmest month (with the highest average high temperature) is July (72.9°F).
The month with the lowest average high temperature is December (20.1°F).

  • Average low temperature in January: 6.1°F

The month with the highest average low temperature is August (43.7°F).
The coldest month (with the lowest average low temperature) is December (4.8°F).

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Average pressure in January
West Yellowstone, MT

Average pressure in January - West Yellowstone, MT
  • Average pressure in January: 30.24"Hg

The month with the highest atmospheric pressure is January (30.24"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

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Average wind speed in January
West Yellowstone, MT

Average wind speed in January - West Yellowstone, MT
  • Average wind speed in January: 6.2mph

The windiest month (with the highest average wind speed) is June (6.8mph).
The calmest month (with the lowest average wind speed) is August (5.8mph).

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Average humidity in January
West Yellowstone, MT

Average humidity in January - West Yellowstone, MT
  • Average humidity in January: 94%

The month with the highest relative humidity is February (95%).
The month with the lowest relative humidity is August (50%).

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Average rainfall in January
West Yellowstone, MT

Average rainfall in January - West Yellowstone, MT
  • Average rainfall in January: 2.09"

The wettest month (with the highest rainfall) is May (2.8").
The driest month (with the least rainfall) is July (0.91").

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Average rainfall days in January
West Yellowstone, MT

Average rainfall days in January - West Yellowstone, MT
  • Average rainfall days in January: 2.2 days

The month with the highest number of rainy days is May (17.4 days).
The month with the least rainy days is January (2.2 days).

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Average snowfall in January
West Yellowstone, MT

Average snowfall in January - West Yellowstone, MT
  • Average snowfall in January: 17.36"

The month with the highest snowfall is February (17.83").
The month with the least snowfall is August (0").

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Average snowfall days in January
West Yellowstone, MT

Average snowfall days in January - West Yellowstone, MT
  • Average snowfall days in January: 22.8 days

The month with the highest number of snowfall days is March (24.4 days).
The months with the least snowfall days are July and August (0.2 days).

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Average daylight in January /
Average sunshine in January
West Yellowstone, MT

Average daylight in January / Average sunshine in January - West Yellowstone, MT
  • Average daylight in January: 9h and 17min

The month with the longest days is June (Average daylight: 15h and 31min).
The month with the shortest days is December (Average daylight: 8h and 53min).

  • Average sunshine in January: 3h and 18min

The month with the most sunshine is July (Average sunshine: 11h and 48min).
The months with the least sunshine are January, February and December (Average sunshine: 3h and 18min).

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Average sunshine days in January
West Yellowstone, MT

Average sunshine days in January - West Yellowstone, MT
  • Average sunshine days in January: 8.6 days

The months with the most sunshine days are July and September (14.7 days).
The month with the least sunshine days is February (5.3 days).

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Average UV index in January
West Yellowstone, MT

Average UV index in January - West Yellowstone, 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, February, March, April, October, November and December (UV index 1).

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Average cloud cover in January
West Yellowstone, MT

Average cloud cover in January - West Yellowstone, MT
  • Average cloud cover in January: 71

The month with the most cloud cover is February (Cloud cover 76).
The month with the least cloud cover is July (Cloud cover 16).

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Average visibility in January
West Yellowstone, MT

Average visibility in January - West Yellowstone, MT
  • Average visibility in January: 3mi

The months with the highest visibility are June, July, August and September (6mi).
The months with the lowest visibility are January, February, March and December (3mi).

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