January weather forecast
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

Weather in January

January, the same as December, in Jackson, Wyoming, is another subzero cold winter month, with an average temperature ranging between min 4.8°F (-15.1°C) and max 23.5°F (-4.7°C).

Temperature

In January, the average high-temperature is essentially the same as in December - a still freezing cold 23.5°F (-4.7°C). The average low-temperature, in January, is 4.8°F (-15.1°C).

Humidity

The average relative humidity in January in Jackson is 93%.

Rainfall

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

Snowfall

January through December are months with snowfall. In January, it is snowing for 22.1 days. Throughout January, 25.91" (658mm) of snow is accumulated. 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 7:39 am and sunset at 5:33 pm MST.

Sunshine

In Jackson, the average sunshine in January 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 value of 2, and less, symbolizes a low health risk from unprotected exposure to Sun's UV rays for ordinary individuals.
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 solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

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 many days does it snow in January in Jackson?

In Jackson, Wyoming, during January, snow falls for 22.1 days and regularly aggregates up to 25.91" (658mm) of snow.

How many hours of daylight does Jackson have in January?

In Jackson, Wyoming, the average day length in January 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, sunrise is at 7:39 am and sunset at 5:33 pm MST.

How long on average sun shines in January in Jackson?

The average sunshine duration in January is 3.6h.

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

The months with the lowest UV index in Jackson 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?

The average daily maximum UV index in January in Jackson, Wyoming, is 1. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to Sun's UV rays.

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 24min

The month with the longest days is June (Average daylight: 15h and 22min).
The month with the shortest days is December (Average daylight: 9h and 1min).

  • Average sunshine in January: 3.6h

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

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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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