January Weather in Oregon, United States

Last updated: June 24, 2025

In January, the average temperature in Oregon, United States hovers around -6°C (21°F), with extremes reaching as low as -32°C (-26°F) and peaking at 11°C (51°F). Rainfall accumulates to about 52 mm (2.1 in) over 8 days, contributing to an average humidity level of 85%.

January Temperature in Oregon

In January in Oregon, the average temperature is -6°C (21°F). Maximums can reach 11°C (51°F), while minimums can drop as low as -32°C (-26°F). Travelers should be prepared for significant temperature fluctuations and dress accordingly for the cold conditions.

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

The chart illustrates January temperature patterns in Oregon, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Oregon, January typically has an average temperature of -6°C (21°F), with highs reaching up to 11°C (51°F) and lows dropping to around -32°C (-26°F).

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

January Precipitation in Oregon

In Oregon in January, the total precipitation amount is 52 mm (2.1 in) over the course of 8 days.

January Precipitation Trends in Oregon

The chart displays monthly precipitation patterns in Oregon, 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 Oregon, January typically receives around 52 mm (2.1 inches) of precipitation spread over approximately 8 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 Oregon

In Oregon in January, humidity is 85%. With an average temperature of -6°C (21°F), this humidity feels like a damp chill that seeps into your bones, making travel uncomfortable and forcing you to bundle up even more than usual as you navigate through frosty air.

January Average Humidity in Oregon

This chart illustrates the average monthly humidity levels in Oregon, 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 Oregon is approximately 85%, 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 Oregon

In Oregon 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 Oregon, you can check the information here.

Maximum UV Index Levels in Oregon for January

The chart shows the monthly maximum UV Index (UVI) for Oregon 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 Oregon typically reaches 3, which falls under the moderate exposure category.

Data source: Oregon 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 Oregon Compares to Other Months

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

This table compares monthly weather conditions in Oregon, 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 (21°F)	52 mm (2.1 inches)	85%	moderate
February Weather	-5°C (23°F)	54 mm (2.1 inches)	85%	moderate
March Weather	2°C (36°F)	58 mm (2.3 inches)	85%	moderate
April Weather	8°C (46°F)	95 mm (3.7 inches)	85%	very high
May Weather	15°C (60°F)	133 mm (5.2 inches)	78%	very high
June Weather	21°C (71°F)	121 mm (4.8 inches)	80%	very high
July Weather	24°C (75°F)	84 mm (3.3 inches)	78%	very high
August Weather	22°C (71°F)	111 mm (4.4 inches)	76%	very high
September Weather	18°C (65°F)	120 mm (4.7 inches)	79%	very high
October Weather	11°C (51°F)	117 mm (4.6 inches)	83%	moderate
November Weather	2°C (37°F)	43 mm (1.7 inches)	88%	moderate
December Weather	-2°C (29°F)	46 mm (1.8 inches)	81%	low