January weather forecast
Yellowstone National Park, WY

Share
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

A bone-chilling cold takes over Yellowstone National Park, Wyoming in January. The temperatures tumble to the lowest of the year, with the mercury dipping to a frigid 1.2°F (-17.1°C) and peaking at a chilly 24.4°F (-4.2°C). The near-constant snowfall, with a monthly collection of 34.3" (871mm), creates a winter wonderland. Travellers should equip themselves with warm clothes and necessary gear. The reduced hours of daylight and sunshine add to the arctic ambiance of the place.

Temperature

Yellowstone National Park transitions into January recording an average high-temperature of a still subzero cold 24.4°F (-4.2°C), closely aligning with the preceding month's temperature. January nights see a notable contrast from daytime highs, with the nighttime temperature averaging at a polar cold 1.2°F (-17.1°C).

Rainfall

In Yellowstone National Park, Wyoming, during January, the rain falls for 16.8 days and regularly aggregates up to 1.65" (42mm) of precipitation. Throughout the year, in Yellowstone National Park, there are 151 rainfall days, and 20.91" (531mm) of precipitation is accumulated.

Snowfall

January through June, September through December are months with snowfall 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 34.29" (871mm) 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 5:29 pm MST.

Sunshine

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

UV index

January and 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 health risk from unsafe exposure to UV radiation for the ordinary person.
Note: A maximum high daily UV index of 1 during January translates into the following directions:
While most people are not greatly affected by extended sun exposure, those with fair skin, babies, and children must always have protection. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. A hat with a broad brim is indispensable, filtering out up to half of UV rays. Guard yourself! Snow reflection can almost double the UV radiation from the Sun.
[Resources]

Frequently asked questions

How cold is January in Yellowstone National Park?

The high-temperature, in January, in Yellowstone National Park, is 24.4°F (-4.2°C), while the low-temperature averages to 1.2°F (-17.1°C).

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" (42mm) of accumulated precipitation.

What is the snowiest month in Yellowstone National Park?

January is the month with the most snowfall in Yellowstone National Park. Snow falls for 16.2 days and accumulates 34.29" (871mm) of snow.

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

In Yellowstone National Park, Wyoming, in January, snow falls for 16.2 days, with typically accumulated 34.29" (871mm) of snow.

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

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

When is the sunrise / 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, sunrise is at 7:41 am and sunset at 5:29 pm MST.

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

In January, the average sunshine duration in Yellowstone National Park 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 are January and December, with an average maximum UV index of 1.

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

In January, the average daily maximum UV index is 1. A UV Index estimate of 2, and below, represents a low health risk from unsafe exposure to Sun's UV rays.
Average rainfall days
Average snowfall days
Average daylight
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).

[Resources]

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").

[Resources]

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).

[Resources]

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").

[Resources]

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).

[Resources]

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 2min

The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).

  • 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).

[Resources]

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).

[Resources]

Yellowstone National Park, Wyoming, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location