January Weather in Ellensburg, United States

Last updated: June 24, 2025

In January, the average temperature in Ellensburg, United States hovers around -2°C (29°F). Weather conditions can vary widely, with minimum lows dropping to a frigid -22°C (-8°F) and maximum highs reaching a milder 9°C (48°F). Expect 75 mm (2.9 in) of precipitation spread over about 14 days, contributing to an average humidity level of 86%. Stay prepared for chilly and damp conditions!

January Temperature in Ellensburg

In January in Ellensburg, the average temperature is -2°C (29°F). The maximum can reach 9°C (48°F), and the minimum can be as low as -22°C (-8°F). Travelers should be prepared for cold conditions and dress warmly to fully enjoy their visit.

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

The chart illustrates January temperature patterns in Ellensburg, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Ellensburg, January typically has an average temperature of -2°C (29°F), with highs reaching up to 9°C (48°F) and lows dropping to around -22°C (-8°F).

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

January Precipitation in Ellensburg

In Ellensburg in January, the total precipitation amount is 75 mm (2.9 in) accumulated over a period of 14 days.

January Precipitation Trends in Ellensburg

The chart displays monthly precipitation patterns in Ellensburg, 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 Ellensburg, January typically receives around 75 mm (2.9 inches) of precipitation spread over approximately 14 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 Ellensburg

In Ellensburg in January humidity is 86%. With an average temperature of -2°C (29°F), this humidity feels like a damp chill that seeps through layers of clothing, making outdoor activities uncomfortable and travel plans challenging.

January Average Humidity in Ellensburg

This chart illustrates the average monthly humidity levels in Ellensburg, 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 Ellensburg is approximately 86%, 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 Ellensburg

In Ellensburg in January, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Ellensburg, you can visit Hourly UV Index in Ellensburg.

Maximum UV Index Levels in Ellensburg for January

The chart shows the monthly maximum UV Index (UVI) for Ellensburg 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 Ellensburg typically reaches 2, which falls under the low exposure category.

Data source: Ellensburg 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 Ellensburg Compares to Other Months

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

This table compares monthly weather conditions in Ellensburg, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-2°C (29°F)	75 mm (2.9 inches)	86%	low
February Weather	-1°C (31°F)	75 mm (3.0 inches)	86%	moderate
March Weather	3°C (38°F)	44 mm (1.7 inches)	87%	high
April Weather	8°C (46°F)	38 mm (1.5 inches)	84%	high
May Weather	13°C (56°F)	23 mm (0.9 inches)	81%	very high
June Weather	17°C (63°F)	13 mm (0.5 inches)	82%	very high
July Weather	21°C (70°F)	1 mm (0.1 inches)	79%	very high
August Weather	21°C (69°F)	5 mm (0.2 inches)	63%	very high
September Weather	15°C (60°F)	24 mm (1.0 inches)	62%	very high
October Weather	8°C (46°F)	53 mm (2.1 inches)	83%	moderate
November Weather	2°C (37°F)	58 mm (2.3 inches)	89%	moderate
December Weather	-1°C (31°F)	72 mm (2.8 inches)	88%	low