January weather forecast
Jackson, WY

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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

Weather in January

January in Jackson, Wyoming, exhibits the chilling grip of winter. The brisk winds from the west bring temperatures plummeting below the freezing point. With peaks hardly reaching 23.5°F (-4.7°C), even the afternoons can feel quite cold. Snow blankets the city, transforming the landscape into a winter wonderland. The streets bear a mesmerizing look; however, visibility gets limited due to the dense veil of snowfall.

Temperature

Jackson, Wyoming, experiences an average high-temperature of a still subzero cold 23.5°F (-4.7°C) with the onset of January, subtly varied from December's 21.9°F (-5.6°C). During the nights in January, Jackson observes an average low-temperature of 4.8°F (-15.1°C).

Humidity

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

Rainfall

In Jackson, during January, the rain falls for 2.9 days and regularly aggregates up to 3.11" (79mm) of precipitation. Throughout the year, there are 103 rainfall days, and 29.84" (758mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Jackson are January through December. In Jackson, in January, snow falls for 22.1 days, with typically accumulated 25.91" (658mm) of snow. Throughout the year, in Jackson, there are 173.6 snowfall days, and 181.26" (4604mm) of snow is accumulated.

Daylight

In Jackson, the average length of the day in January is 9h and 24min.
On the first day of January, sunrise is at 7:55 am and sunset at 4:57 pm. On the last day of the month, sunrise is at 7:40 am and sunset at 5:32 pm MST.

Sunshine

The average sunshine in January in Jackson, Wyoming, is 3.6h.

UV index

The months with the lowest UV index are January through April, October through December, with an average maximum UV index of 1. A UV Index estimate of 2, and below, represents a minimal health hazard from unprotected exposure to Sun's UV rays for average individuals.
Note: The daily maximum UV index of 1 in January interprets into the following advice:
Prolonged sun exposure generally does not trouble most people. However, it is vital to ensure protection for babies, children, and individuals with sensitive skin. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays. Take into account! The reflection from snow can nearly double the Sun's UV radiation intensity.
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Frequently asked questions

How cold is January in Jackson?

In Jackson, in January, the average high-temperature is 23.5°F (-4.7°C), and the average low-temperature is 4.8°F (-15.1°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, in January, during 2.9 rainfall days, 3.11" (79mm) of precipitation is typically accumulated.

How many days does it snow in January in Jackson?

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 January, the average day length is 9h and 24min.

What time are sunrise and sunset in January in Jackson?

In January, on the first day of the month, sunrise is at 7:55 am and sunset at 4:57 pm. On the last day of the month, in Jackson, sunrise is at 7:40 am and sunset at 5:32 pm MST.

How long on average sun shines in January in Jackson?

In January, the average sunshine duration is 3.6h.

What are the months with the lowest UV index in Jackson?

The months with the lowest UV index in Jackson, Wyoming, 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, Wyoming, the average daily maximum UV index in January is 1. A UV Index value of 2, and less, symbolizes a low health threat from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in January
Jackson, WY

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: 4.8°F

The month with the highest average low temperature is July (43.5°F).
The coldest month (with the lowest average low temperature) is January (4.8°F).

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Average pressure in January
Jackson, WY

Average pressure in January - Jackson, WY
  • Average pressure in January: 30.27"Hg

The month with the highest atmospheric pressure is January (30.27"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

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Average wind speed in January
Jackson, WY

Average wind speed in January - Jackson, WY
  • Average wind speed in January: 4.4mph

The windiest month (with the highest average wind speed) is June (5.7mph).
The calmest month (with the lowest average wind speed) is December (4.3mph).

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Average humidity in January
Jackson, WY

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%).

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Average rainfall in January
Jackson, WY

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 least rainfall) is August (1.34").

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Average rainfall days in January
Jackson, WY

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 least rainy days is January (2.9 days).

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Average snowfall in January
Jackson, WY

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 least snowfall is August (0.12").

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Average snowfall days in January
Jackson, WY

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 least snowfall days is July (0.4 days).

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Average daylight in January /
Average sunshine in January
Jackson, WY

Average daylight in January / Average sunshine in January - Jackson, WY
  • Average daylight in January: 9h and 2min

The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).

  • Average sunshine in January: 3h and 4min

The month with the most sunshine is July (Average sunshine: 11h and 36min).
The month with the least sunshine is February (Average sunshine: 3h and 24min).

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Average sunshine days in January
Jackson, WY

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

The month with the most sunshine days is July (15.6 days).
The month with the least sunshine days is April (3.8 days).

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Average UV index in January
Jackson, WY

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).
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
Jackson, WY

Average cloud cover in January - Jackson, WY
  • Average cloud cover in January: 65

The month with the most cloud cover is February (Cloud cover 72).
The months with the least cloud cover are July and August (Cloud cover 16).

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Average visibility in January
Jackson, WY

Average visibility in January - Jackson, WY
  • 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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Jackson, Wyoming, USA

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