January Weather in Greeley, United States

Last updated: June 24, 2025

In January, the average temperature in Greeley, United States hovers around -4°C (25°F). Expect it to dip as low as -24°C (-12°F) during cooler spells, while peaks can reach up to 14°C (58°F). The precipitation measures about 24 mm (0.9 in) over the course of 3 days, accompanied by an average humidity level of 73%. Prepare accordingly for a chilly yet inviting atmosphere!

January Temperature in Greeley

In January in Greeley, the average temperature is -4°C (25°F). The maximum can reach 14°C (58°F) and the minimum can drop as low as -24°C (-12°F). Be prepared for a wide range of temperatures if you're planning to travel during this time.

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 -4°C (25°F), with highs reaching up to 14°C (58°F) and lows dropping to around -24°C (-12°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 24 mm (0.9 in) over a span of 3 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 24 mm (0.9 inches) of precipitation spread over approximately 3 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 73%. With an average temperature of -4°C (25°F), this humidity feels like a biting chill that seeps through layers of clothing, making outdoor activities brisk and invigorating, yet a bit challenging for comfortable traveling.

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 73%, 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 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 Greeley, you can check the information here.

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 3, 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	-4°C (25°F)	24 mm (0.9 inches)	73%	moderate
February Weather	-4°C (25°F)	20 mm (0.8 inches)	81%	moderate
March Weather	4°C (39°F)	84 mm (3.3 inches)	69%	high
April Weather	9°C (48°F)	61 mm (2.4 inches)	71%	very high
May Weather	15°C (60°F)	144 mm (5.7 inches)	80%	very high
June Weather	23°C (74°F)	89 mm (3.5 inches)	83%	extreme
July Weather	25°C (77°F)	77 mm (3.0 inches)	84%	very high
August Weather	23°C (73°F)	91 mm (3.6 inches)	84%	very high
September Weather	20°C (68°F)	57 mm (2.3 inches)	77%	very high
October Weather	10°C (50°F)	85 mm (3.3 inches)	72%	high
November Weather	4°C (39°F)	22 mm (0.9 inches)	80%	moderate
December Weather	-1°C (30°F)	42 mm (1.6 inches)	79%	moderate