January Weather in Greeley, United States

Last updated: June 24, 2025

In Greeley, United States, the average temperature in January hovers around -1°C (31°F), with extremes ranging from a brisk -26°C (-14°F) to a mild 16°C (62°F). Expect 11 mm (0.4 in) of precipitation over about 2 days, accompanied by an average humidity level of 72%. Pack accordingly for a chilly yet variable month!

January Temperature in Greeley

In January in Greeley, the average temperature is -1°C (31°F). Maximum temperatures can reach 16°C (62°F), while minimums can dip as low as -26°C (-14°F). Travelers should be prepared for a wide range of temperatures and pack accordingly for both mild and extreme cold conditions.

January Weather in Greeley: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in Greeley, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Greeley, January typically has an average temperature of -1°C (31°F), with highs reaching up to 16°C (62°F) and lows dropping to around -26°C (-14°F).

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

January Precipitation in Greeley

In Greeley in January, the precipitation amount is 11 mm (0.4 in) over the course of 2 days.

January Precipitation Trends in Greeley

The chart displays monthly precipitation patterns in Greeley, 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 Greeley, January typically receives around 11 mm (0.4 inches) of precipitation spread over approximately 2 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 Greeley

In Greeley in January humidity is 72%. With an average temperature of -1°C (31°F), this humidity feels like a chilling blanket that seeps into your clothes, making outdoor exploration quite uncomfortable and potentially frosty, so it's best to bundle up if you're venturing outside.

January Average Humidity in Greeley

This chart illustrates the average monthly humidity levels in Greeley, 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 Greeley is approximately 72%, 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 Greeley

In Greeley in January, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Greeley for better planning.

Maximum UV Index Levels in Greeley for January

The chart shows the monthly maximum UV Index (UVI) for Greeley 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 Greeley typically reaches 4, which falls under the moderate exposure category.

Data source: Greeley 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 Greeley Compares to Other Months

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

This table compares monthly weather conditions in Greeley, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-1°C (31°F)	11 mm (0.4 inches)	72%	moderate
February Weather	-1°C (30°F)	13 mm (0.5 inches)	76%	moderate
March Weather	5°C (42°F)	44 mm (1.7 inches)	61%	high
April Weather	9°C (49°F)	35 mm (1.4 inches)	60%	very high
May Weather	14°C (58°F)	95 mm (3.8 inches)	74%	very high
June Weather	21°C (71°F)	34 mm (1.3 inches)	82%	extreme
July Weather	25°C (77°F)	30 mm (1.2 inches)	82%	extreme
August Weather	23°C (74°F)	32 mm (1.3 inches)	84%	very high
September Weather	20°C (68°F)	15 mm (0.6 inches)	75%	very high
October Weather	10°C (49°F)	24 mm (0.9 inches)	73%	high
November Weather	5°C (41°F)	15 mm (0.6 inches)	74%	moderate
December Weather	0°C (33°F)	10 mm (0.4 inches)	77%	moderate