January weather forecast
Grand Junction, CO

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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 in Grand Junction, Colorado sees a mingling of chilly temperatures and moderate humidity. The city experiences the year's coldest temperatures with highest around 34.9°F (1.6°C) and lowest around 18.3°F (-7.6°C). An overall sense of freshness pervades as snowfalls are not uncommon, adding to the overall humidity. Despite cold conditions, the city enjoys an average of 9.8 hours of daylight with 6.3 hours of sunshine. Contrasting greatly with temperatures, January yields the highest atmospheric pressure, promising fair, albeit cold, weather.

Temperature

With average high temperatures of 34.9°F (1.6°C) and lows of 18.3°F (-7.6°C), January is the coldest month in Grand Junction.

Humidity

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

Rainfall

In January, the rain falls for 7.3 days. Throughout January, 0.67" (17mm) of precipitation is accumulated. Throughout the year, 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 January, it is snowing for 7.9 days. Throughout January, 2.83" (72mm) of snow is accumulated. Throughout the year, there are 28.3 snowfall days, and 11.5" (292mm) of snow is accumulated.

Daylight

In January, the average length of the day is 9h and 48min.
On the first day of the month, sunrise is at 7:33 am and sunset at 5:02 pm. On the last day of January, in Grand Junction, sunrise is at 7:21 am and sunset at 5:33 pm MST.

Sunshine

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

UV index

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: In January, the maximum UV index of 2 suggests these recommendations:
While most people can stay under the sun for an hour without burning, children must always be guarded against sun exposure. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation. Beware! Reflection from snow can magnify the Sun's UV radiation nearly twofold.
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Frequently asked questions

What month is the coldest in Grand Junction?

In Grand Junction, January is the coldest month, with temperatures averaging a high of 34.9°F (1.6°C) and a low of 18.3°F (-7.6°C).

How cold is it in Grand Junction in January?

In Grand Junction, in January, the average high-temperature is 34.9°F (1.6°C), and the average low-temperature is 18.3°F (-7.6°C).

What is the most humid month in Grand Junction?

The most humid month in Grand Junction, Colorado, 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 in Grand Junction is 78%.

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

In Grand Junction, in January, it is raining for 7.3 days, with typically 0.67" (17mm) of accumulated precipitation.

How much does it snow in Grand Junction in January?

In January, in Grand Junction, Colorado, 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 day length in Grand Junction is 9h and 48min.

What time are sunrise and sunset in January in Grand Junction?

On the first day of January, sunrise is at 7:33 am and sunset at 5:02 pm. On the last day of the month, sunrise is at 7:21 am and sunset at 5:33 pm MST.

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

January has the least sunshine of the year in Grand Junction, 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 duration in January is 6.3h.

When is the lowest UV index in Grand Junction?

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

How high is the UV index in January in Grand Junction?

In Grand Junction, the average daily maximum UV index in January is 2. A UV Index value of 2, and less, symbolizes a minimal health vulnerability 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
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"Hg

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

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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").
The 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).
The 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: 9h and 5min

The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).

  • Average sunshine in January: 6h and 2min

The month with the most sunshine is June (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 6h and 18min).

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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

The months with the highest UV index are June, July and August (UV index 6).
The 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).
The 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

The 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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Grand Junction, Colorado, USA

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