January weather forecast and climate
Grand Junction, CO

The scenic Grand Junction in Colorado with the iconic Colorado River and high hills nearby
The scenic Grand Junction in Colorado with the iconic Colorado River and high hills nearby

Weather in January

January, the same as December, is a wintry winter month in Grand Junction, Colorado, with average temperature ranging between max 34.9°F (1.6°C) and min 18.3°F (-7.6°C).

Temperature

January is the coldest month, with an average high-temperature of 34.9°F (1.6°C) and an average low-temperature of 18.3°F (-7.6°C).

Humidity

January is the most humid month in Grand Junction, Colorado, with an average relative humidity of 78%.

Rainfall

In Grand Junction, during January, the rain falls for 7.3 days and regularly aggregates up to 0.67" (17mm) of precipitation. Throughout the year, in Grand Junction, there are 93.6 rainfall days, and 8.46" (215mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Grand Junction are January through April, October through December. In Grand Junction, Colorado,, during 7.9 snowfall days, 2.83" (72mm) of snow is typically accumulated. Throughout the year, there are 28.3 snowfall days, and 11.5" (292mm) of snow is accumulated.

Daylight

In Grand Junction, the average length of the day in January is 9.8h.

Sunshine

The month with the least sunshine is January, with an average of 6.3h of sunshine.

UV index

Months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a low threat to health from the exposure to the Sun's UV rays for average individuals.
Note: In January, the average maximum UV index of 2 translate into the following recommendations:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to 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. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the coldest month in Grand Junction?

With an average high-temperature of 34.9°F (1.6°C) and an average low-temperature of 18.3°F (-7.6°C), January is the coldest month.

What is the most humid month in Grand Junction?

The most humid month is January, with an average relative humidity of 78%.

What is the average humidity in January in Grand Junction?

The average relative humidity in January is 78%.

How much does it rain in Grand Junction in January?

In January, in Grand Junction, Colorado, the rain falls for 7.3 days. Throughout January, 0.67" (17mm) of precipitation is accumulated.

How many days does it snow in January in Grand Junction?

In January, it is snowing for 7.9 days. Throughout January, 2.83" (72mm) of snow is accumulated.

How many hours of daylight does Grand Junction have in January?

In January, the average length of the day in Grand Junction is 9.8h.

What is the month with the least sunshine in Grand Junction?

January has the least sunshine of the year in Grand Junction, Colorado, with an average of 6.3h of sunshine.

How many hours of sunshine does Grand Junction have in January?

In Grand Junction, Colorado, the average sunshine in January is 6.3h.

What are the months with the lowest UV index in Grand Junction?

Months with the lowest UV index in Grand Junction, Colorado, are January, February, November and December, with an average maximum UV index of 2.

What is the UV index intensity in January in Grand Junction?

In January, the average daily maximum UV index in Grand Junction, Colorado, is 2. A UV Index value of 2, and less, symbolizes a low health risk from unprotected exposure to the UV radiation.

Average temperature in January
Grand Junction, CO

Average temperature in January - Grand Junction, CO
  • Average high temperature in January: 34.9°F

The warmest month (with the highest average high temperature) is July (86.9°F).
The month with the lowest average high temperature is January (34.9°F).

  • Average low temperature in January: 18.3°F

The month with the highest average low temperature is July (60.4°F).
The coldest month (with the lowest average low temperature) is January (18.3°F).

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Average pressure in January
Grand Junction, CO

Average pressure in January - Grand Junction, CO
  • Average pressure in January: 30.27"

The month with the highest atmospheric pressure is January (30.27").
Months with the lowest atmospheric pressure are May and June (29.9").

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Average wind speed in January
Grand Junction, CO

Average wind speed in January - Grand Junction, CO
  • Average wind speed in January: 4.2mph

The windiest month (with the highest average wind speed) is June (7.5mph).
The calmest month (with the lowest average wind speed) is January (4.2mph).

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Average humidity in January
Grand Junction, CO

Average humidity in January - Grand Junction, CO
  • Average humidity in January: 78%

The month with the highest relative humidity is January (78%).
The month with the lowest relative humidity is June (29%).

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Average rainfall in January
Grand Junction, CO

Average rainfall in January - Grand Junction, CO
  • Average rainfall in January: 0.67"

The wettest month (with the highest rainfall) is March (1.06").
The driest month (with the least rainfall) is June (0.51").

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Average rainfall days in January
Grand Junction, CO

Average rainfall days in January - Grand Junction, CO
  • Average rainfall days in January: 7.3 days

The month with the highest number of rainy days is March (10.4 days).
The month with the least rainy days is November (5.5 days).

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Average snowfall in January
Grand Junction, CO

Average snowfall in January - Grand Junction, CO
  • Average snowfall in January: 2.83"

The month with the highest snowfall is December (3.74").
Months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in January
Grand Junction, CO

Average snowfall days in January - Grand Junction, CO
  • Average snowfall days in January: 7.9 days

The month with the highest number of snowfall days is January (7.9 days).
Months with the least snowfall days are May, June, July, August and September (0 days).

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Average daylight in January /
Average sunshine in January
Grand Junction, CO

Average daylight in January / Average sunshine in January - Grand Junction, CO
  • Average daylight in January: 9.8h

The month with the longest days is June (Average daylight: 14.9h).
The month with the shortest days is December (Average daylight: 9.5h).

  • Average sunshine in January: 6.3h

The month with the most sunshine is June (Average sunshine: 12h).
The month with the least sunshine is January (Average sunshine: 6.3h).

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Average sunshine days in January
Grand Junction, CO

Average sunshine days in January - Grand Junction, CO
  • Average sunshine days in January: 18.5 days

The month with the most sunshine days is November (22.3 days).
The month with the least sunshine days is February (15.8 days).

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Average UV index in January
Grand Junction, CO

Average UV index in January - Grand Junction, CO
  • Average UV index in January: 2

Months with the highest UV index are June, July and August (UV index 6).
Months with the lowest UV index are January, February, November and December (UV index 2).

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Average cloud cover in January
Grand Junction, CO

Average cloud cover in January - Grand Junction, CO
  • Average cloud cover in January: 31

The month with the most cloud cover is January (Cloud cover 31).
Months with the least cloud cover are June and September (Cloud cover 11).

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Average visibility in January
Grand Junction, CO

Average visibility in January - Grand Junction, CO
  • Average visibility in January: 5mi

Months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).

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