January weather forecast
Yellowstone National Park, WY

The natural Grand Prismatic hot springs within Yellowstone National Park, Wyoming, with yellow trails and trees and mountains in the background
The natural Grand Prismatic hot springs within Yellowstone National Park, Wyoming, with yellow trails and trees and mountains in the background

Weather in January

January, the same as December, in Yellowstone National Park, Wyoming, is a freezing cold winter month, with an average temperature varying between 1.2°F (-17.1°C) and 24.4°F (-4.2°C).

Temperature

In January, the average high-temperature is relatively the same as in December - a still subzero cold 24.4°F (-4.2°C). The average low-temperature, in Yellowstone National Park, is 1.2°F (-17.1°C).

Rainfall

In Yellowstone National Park, in January, during 16.8 rainfall days, 1.65" (41.9mm) of precipitation is typically accumulated. In Yellowstone National Park, during the entire year, the rain falls for 151 days and collects up to 20.9" (530.8mm) of precipitation.

Snowfall

Months with snowfall in Yellowstone National Park are January through June, September through December. January is the month with the most snowfall in Yellowstone National Park. Snow falls for 16.2 days and accumulates 34.3" (871.2mm) of snow.

Daylight

In Yellowstone National Park, the average length of the day in January is 9h and 18min.
On the first day of the month, sunrise is at 7:58 am and sunset at 4:53 pm. On the last day of January, sunrise is at 7:41 am and sunset at 5:30 pm MST.

Sunshine

In Yellowstone National Park, the average sunshine in January is 5h.

UV index

January and December, with an average maximum UV index of 1, are months with the lowest UV index in Yellowstone National Park. A UV Index reading of 2, and below, represents a minimal health hazard from unprotected exposure to Sun's UV rays for the average person.
Note: The daily maximum UV index of 1 in January interpret into the following advice:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. 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

How much does it rain in Yellowstone National Park in January?

In Yellowstone National Park, Wyoming, in January, it is raining for 16.8 days, with typically 1.65" (41.9mm) of accumulated precipitation.

When does it snow the most in Yellowstone National Park?

January is the month with the most snowfall in Yellowstone National Park, Wyoming. Snow falls for 16.2 days and accumulates 34.3" (871.2mm) of snow.

How many days does it snow in January in Yellowstone National Park?

In January, in Yellowstone National Park, it is snowing for 16.2 days. Throughout January, 34.3" (871.2mm) of snow is accumulated.

What is the average length of the day in January in Yellowstone National Park?

In Yellowstone National Park, the average day length in January is 9h and 18min.

When are sunrise and sunset in January in Yellowstone National Park?

In January, on the first day of the month, sunrise is at 7:58 am and sunset at 4:53 pm. On the last day of the month, in Yellowstone National Park, Wyoming, sunrise is at 7:41 am and sunset at 5:30 pm MST.

How many hours of sunshine does Yellowstone National Park have in January?

The average sunshine duration in January in Yellowstone National Park, Wyoming, is 5h.

What is the month with the lowest UV index in Yellowstone National Park?

The months with the lowest UV index in Yellowstone National Park, Wyoming, are January and December, with an average maximum UV index of 1.

How high is the UV index in January in Yellowstone National Park?

The average daily maximum UV index in January in Yellowstone National Park is 1. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to Sun's UV rays.
Average rainfall days
Average snowfall days
Average sunshine
Average UV index

Average temperature in January
Yellowstone National Park, WY

Average temperature in January - Yellowstone National Park, WY
  • Average high temperature in January: 24.4°F

The warmest month (with the highest average high temperature) is July (71.6°F).
The month with the lowest average high temperature is December (24.3°F).

  • Average low temperature in January: 1.2°F

The month with the highest average low temperature is July (41.6°F).
The coldest months (with the lowest average low temperature) are January and February (1.2°F).

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Average rainfall in January
Yellowstone National Park, WY

Average rainfall in January - Yellowstone National Park, WY
  • Average rainfall in January: 1.7"

The wettest month (with the highest rainfall) is May (2.5").
The driest month (with the least rainfall) is October (1.2").

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Average rainfall days in January
Yellowstone National Park, WY

Average rainfall days in January - Yellowstone National Park, WY
  • Average rainfall days in January: 16.8 days

The month with the highest number of rainy days is January (16.8 days).
The month with the least rainy days is October (8.8 days).

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Average snowfall in January
Yellowstone National Park, WY

Average snowfall in January - Yellowstone National Park, WY
  • Average snowfall in January: 34.3"

The month with the highest snowfall is January (34.3").
The months with the least snowfall are July and August (0").

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Average snowfall days in January
Yellowstone National Park, WY

Average snowfall days in January - Yellowstone National Park, WY
  • Average snowfall days in January: 16.2 days

The month with the highest number of snowfall days is January (16.2 days).
The months with the least snowfall days are July and August (0 days).

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Average daylight in January /
Average sunshine in January
Yellowstone National Park, WY

Average daylight in January / Average sunshine in January - Yellowstone National Park, WY
  • Average daylight in January: 9h and 18min

The month with the longest days is June (Average daylight: 15h and 29min).
The month with the shortest days is December (Average daylight: 8h and 55min).

  • Average sunshine in January: 5h

The month with the most sunshine is July (Average sunshine: 11h).
The month with the least sunshine is December (Average sunshine: 4h).

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Average UV index in January
Yellowstone National Park, WY

Average UV index in January - Yellowstone National Park, WY
  • Average UV index in January: 1

The month with the highest UV index is July (UV index 10).
The months with the lowest UV index are January and December (UV index 1).

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