January Weather in Grand Junction, United States

Last updated: June 24, 2025

In January, the average temperature in Grand Junction, United States hovers around -6°C (22°F), making it quite chilly. Expect minimum temperatures plummeting to -30°C (-21°F), while highs can reach up to 13°C (56°F). On average, 32 mm (1.3 in) of precipitation falls over 6 days, contributing to an average humidity of 78%. Stay warm and prepared for the winter weather!

January Temperature in Grand Junction

In January in Grand Junction, the average temperature is -6°C (22°F). The maximum can reach 13°C (56°F), while the minimum can plunge as low as -30°C (-21°F). Be sure to dress warmly and prepare for a wide range of temperatures if you plan to travel during this time.

January Weather in Grand Junction: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in Grand Junction, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Grand Junction, January typically has an average temperature of -6°C (22°F), with highs reaching up to 13°C (56°F) and lows dropping to around -30°C (-21°F).

Data source: Temperature data for Grand Junction generated using information from the Copernicus Climate Change Service.

January Precipitation in Grand Junction

In Grand Junction in January, the total precipitation amount is 32 mm (1.3 in) over the course of 6 days.

January Precipitation Trends in Grand Junction

The chart displays monthly precipitation patterns in Grand Junction, with values for each month alongside January’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how January’s conditions compare to those of other months. In Grand Junction, January typically receives around 32 mm (1.3 inches) of precipitation spread over approximately 6 days.

Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

January Humidity in Grand Junction

In Grand Junction in January, humidity is 78%. With an average temperature of -6°C (22°F), this humidity feels like a biting chill that seeps through your layers, making outdoor activities less enjoyable and creating a sharp contrast that can be unexpectedly uncomfortable for travelers.

January Average Humidity in Grand Junction

This chart illustrates the average monthly humidity levels in Grand Junction, with January’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In January, average humidity in Grand Junction is approximately 78%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in Grand Junction

In Grand Junction in January, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Grand Junction, you can check the information here.

Maximum UV Index Levels in Grand Junction for January

The chart shows the monthly maximum UV Index (UVI) for Grand Junction in January, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In January, the maximum UV index in Grand Junction typically reaches 3, which falls under the moderate exposure category.

Data source: Grand Junction January UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

How January Weather in Grand Junction Compares to Other Months

Weather in Grand Junction varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Grand Junction, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Grand Junction, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-6°C (22°F)	32 mm (1.3 inches)	78%	moderate
February Weather	-5°C (23°F)	39 mm (1.5 inches)	80%	moderate
March Weather	4°C (39°F)	76 mm (3.0 inches)	77%	moderate
April Weather	9°C (49°F)	66 mm (2.6 inches)	77%	very high
May Weather	17°C (62°F)	163 mm (6.4 inches)	77%	very high
June Weather	23°C (74°F)	101 mm (4.0 inches)	81%	extreme
July Weather	25°C (77°F)	84 mm (3.3 inches)	81%	very high
August Weather	23°C (74°F)	90 mm (3.5 inches)	77%	very high
September Weather	20°C (68°F)	108 mm (4.2 inches)	73%	very high
October Weather	11°C (52°F)	122 mm (4.8 inches)	75%	high
November Weather	3°C (38°F)	36 mm (1.4 inches)	85%	moderate
December Weather	-1°C (30°F)	37 mm (1.4 inches)	83%	moderate