January weather forecast and climate
Jackson, WY

A calm and clear river and vast green fields approaching the iconic white mountains within the Grand Teton National Park in Jackson, Wyoming
A calm and clear river and vast green fields approaching the iconic white mountains within the Grand Teton National Park in Jackson, Wyoming
January, like December, is a freezing cold winter month in Jackson, Wyoming, with temperature in the range of an average high of 28.2°F (-2.1°C) and an average low of 5°F (-15°C).

Temperature

The coldest months are January and December, with an average high-temperature of 28.2°F (-2.1°C).

Rainfall

In January, in Jackson, the rain falls for 11.3 days. Throughout January, 1.4" (35.3mm) of precipitation is accumulated. Throughout the year, there are 108.5 rainfall days, and 16.8" (426.2mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Jackson are January through June, September through December.

Daylight

The average length of the day in January is 9.4h.

Sunshine

In January, the average sunshine is 5h.

UV index

The average daily maximum UV index in Jackson is 2. A UV Index estimate of 2, and below, represents a low health risk from the exposure to the Sun's UV rays for ordinary individuals.
The daily maximum UV index of 2 interpret into the following advice:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. 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. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.

What are the coldest months in Jackson?

January and December, with an average high-temperature of 28.2°F (-2.1°C), are the coldest months in Jackson.

What is the temperature in January in Jackson?

In January, the average high-temperature is 28.2°F (-2.1°C), and the average low-temperature is 5°F (-15°C).

How many days does it rain in January in Jackson?

In Jackson, Wyoming, during January, the rain falls for 11.3 days and regularly aggregates up to 1.4" (35.3mm) of precipitation.

How much does it snow in Jackson in January?

In Jackson, Wyoming, during January, snow falls for 9.6 days and regularly aggregates up to 15.9" (403.9mm) of snow.

How many hours of daylight does Jackson have in January?

The average length of the day in January in Jackson is 9.4h.

How many hours of sunshine does Jackson have in January?

In January, the average sunshine in Jackson, Wyoming, is 5h.

What is the UV index reading in January in Jackson?

In January, the average daily maximum UV index in Jackson, Wyoming, is 2. A UV Index estimate of 2, and below, represents a low health threat from the exposure to the Sun's UV radiation.
Average temperature in January - Jackson, WY
  • Average high temperature in January: 28.2°F

The warmest month (with the highest average high temperature) is July (81.9°F).
Months with the lowest average high temperature are January and December (28.2°F).

  • Average low temperature in January: 5°F

The month with the highest average low temperature is July (40.9°F).
The coldest month (with the lowest average low temperature) is January (5°F).

Average rainfall in January - Jackson, WY
  • Average rainfall in January: 1.4"

The wettest month (with the highest rainfall) is May (2.2").
The driest month (with the lowest rainfall) is February (1.1").

Average rainfall days in January - Jackson, WY
  • Average rainfall days in January: 11.3 days

The month with the highest number of rainy days is January (11.3 days).
The month with the lowest number of rainy days is July (7.5 days).

Average snowfall in January - Jackson, WY
  • Average snowfall in January: 15.9"

The month with the highest snowfall is December (18.6").
Months with the lowest snowfall are July and August (0").

Average snowfall days in January - Jackson, WY
  • Average snowfall days in January: 9.6 days

The month with the highest number of snowfall days is January (9.6 days).
Months with the lowest number of snowfall days are July, August and September (0 days).

Average daylight in January / Average sunshine in January - Jackson, WY
  • Average daylight in January: 9.4h

The month with the longest days is June (Average daylight: 15.4h).
The month with shortest days is December (Average daylight: 9h).

  • Average sunshine in January: 5h

Months with most sunshine are June and July (Average sunshine: 11h).
The month with least sunshine is December (Average sunshine: 4h).

Average UV index in January - Jackson, WY
  • Average UV index in January: 2

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

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