January Weather in Umatilla, United States

Last updated: June 24, 2025

In January, the average temperature in Umatilla, United States hovers around 2°C (36°F). Expect a broad range with a minimum of -17°C (2°F) and a maximum of 17°C (63°F). Precipitation tends to be moderate, with about 35 mm (1.4 in) spread over 9 days. Humidity levels remain high, averaging around 86%, contributing to the crisp, chilly atmosphere.

January Temperature in Umatilla

In January in Umatilla, the average temperature is 2°C (36°F). The maximum can reach 17°C (63°F), and the minimum can be as low as -17°C (2°F). Travelers should prepare for a wide range of temperatures and pack accordingly for both mild and cold weather.

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

The chart illustrates January temperature patterns in Umatilla, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Umatilla, January typically has an average temperature of 2°C (36°F), with highs reaching up to 17°C (63°F) and lows dropping to around -17°C (2°F).

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

January Precipitation in Umatilla

In Umatilla in January, the total precipitation amount reaches 35 mm (1.4 in) over the course of 9 days.

January Precipitation Trends in Umatilla

The chart displays monthly precipitation patterns in Umatilla, 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 Umatilla, January typically receives around 35 mm (1.4 inches) of precipitation spread over approximately 9 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 Umatilla

In Umatilla in January, humidity is 86%. With an average temperature of 2°C (36°F), this humidity feels like a biting chill that clings to your skin, making outdoor exploration uncomfortable and dampening any enthusiasm for travel.

January Average Humidity in Umatilla

This chart illustrates the average monthly humidity levels in Umatilla, 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 Umatilla 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 Umatilla

In Umatilla 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 Umatilla, you can visit Hourly UV Index in Umatilla.

Maximum UV Index Levels in Umatilla for January

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

Data source: Umatilla 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 Umatilla Compares to Other Months

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

This table compares monthly weather conditions in Umatilla, 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 (36°F)	35 mm (1.4 inches)	86%	low
February Weather	3°C (37°F)	46 mm (1.8 inches)	86%	moderate
March Weather	8°C (46°F)	30 mm (1.2 inches)	85%	moderate
April Weather	13°C (55°F)	24 mm (0.9 inches)	83%	high
May Weather	18°C (65°F)	15 mm (0.6 inches)	77%	very high
June Weather	23°C (73°F)	8 mm (0.3 inches)	81%	very high
July Weather	27°C (81°F)	0 mm (0.0 inches)	76%	very high
August Weather	26°C (79°F)	4 mm (0.1 inches)	60%	very high
September Weather	20°C (69°F)	9 mm (0.4 inches)	58%	high
October Weather	12°C (54°F)	26 mm (1.0 inches)	75%	moderate
November Weather	6°C (43°F)	34 mm (1.3 inches)	85%	moderate
December Weather	2°C (37°F)	33 mm (1.3 inches)	87%	low