Jackson
Wyoming, USA
Long-term weather forecast
Long-term weather forecast

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, the same as December, in Jackson, Wyoming, is another subzero cold winter month, with average temperature varying between 32°F (0°C) and 23.5°F (-4.7°C).

Temperature

In January, the average high-temperature is relatively the same as in December - a still subzero cold 23.5°F (-4.7°C). In Jackson, in January, the average low-temperature is 32°F (0°C).

Humidity

In Jackson, the average relative humidity is 93%.

Rainfall

In January, in Jackson, the rain falls for 2.9 days. Throughout January, 3.11" (79mm) of precipitation is accumulated. In Jackson, Wyoming, during the entire year, the rain falls for 103 days and collects up to 29.84" (758mm) of precipitation.

Snowfall

Months with snowfall in Jackson, Wyoming, are January through December. In January, in Jackson, Wyoming, it is snowing for 22.1 days. Throughout January, 25.91" (658mm) of snow is accumulated. In Jackson, during the entire year, snow falls for 173.6 days, and aggregates up to 181.26" (4604mm) of snow.

Daylight

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

Sunshine

The average sunshine in January is 3.6h.

UV index

Months with the lowest UV index in Jackson are January through April, October through December, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a low health risk from unprotected exposure to the Sun's UV rays for ordinary individuals.
Note: In January, the average maximum UV index of 1 translate into the following recommendations:
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.

What is the temperature in January in Jackson?

In January, the average high-temperature is 23.5°F (-4.7°C), and the average low-temperature is 32°F (0°C).

What is the average humidity in January in Jackson?

In Jackson, the average relative humidity in January is 93%.

How many days does it rain in January in Jackson?

In Jackson, Wyoming, during January, the rain falls for 2.9 days and regularly aggregates up to 3.11" (79mm) of precipitation.

How much does it snow in Jackson in January?

In Jackson, in January, snow falls for 22.1 days, with typically accumulated 25.91" (658mm) of snow.

How many hours of daylight does Jackson have in January?

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

How long on average sun shines in January in Jackson?

The average sunshine in January in Jackson is 3.6h.

What is the month with the lowest UV index in Jackson?

Months with the lowest UV index are January through April, October through December, with an average maximum UV index of 1.

How high is the UV index in January in Jackson?

In Jackson, the average daily maximum UV index in January is 1. A UV Index reading of 2, and below, represents a minimal health vulnerability from the exposure to the Sun's UV rays.
Average temperature in January - Jackson, WY
  • Average high temperature in January: 23.5°F

The warmest month (with the highest average high temperature) is July (73.4°F).
The month with the lowest average high temperature is December (21.9°F).

  • Average low temperature in January: 0°F

Months with the highest average low temperature are January, February, March, April, May, June, July, August, September, October, November and December (0°F).
Coldest months (with the lowest average low temperature) are January, February, March, April, May, June, July, August, September, October, November and December (0°F).

Average humidity in January - Jackson, WY
  • Average humidity in January: 93%

The month with the highest relative humidity is February (94%).
The month with the lowest relative humidity is August (50%).

Average rainfall in January - Jackson, WY
  • Average rainfall in January: 3.11"

The wettest month (with the highest rainfall) is February (3.54").
The driest month (with the lowest rainfall) is August (1.34").

Average rainfall days in January - Jackson, WY
  • Average rainfall days in January: 2.9 days

The month with the highest number of rainy days is May (15.4 days).
The month with the lowest number of rainy days is January (2.9 days).

Average snowfall in January - Jackson, WY
  • Average snowfall in January: 25.91"

The month with the highest snowfall is February (29.33").
The month with the lowest snowfall is August (0.12").

Average snowfall days in January - Jackson, WY
  • Average snowfall days in January: 22.1 days

The month with the highest number of snowfall days is March (24.8 days).
The month with the lowest number of snowfall days is July (0.4 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: 3.6h

The month with most sunshine is July (Average sunshine: 11.6h).
The month with least sunshine is February (Average sunshine: 3.4h).

Average UV index in January - Jackson, WY
  • Average UV index in January: 1

The month with the highest UV index is July (UV index 5).
Months with the lowest UV index are January, February, March, April, October, November and December (UV index 1).