January Weather in Oregon, United States

Last updated: June 24, 2025

In Oregon, United States, the average temperature in January hovers around -2°C (29°F). While the mercury can dip as low as -27°C (-16°F), it has been known to peak at 17°C (62°F). During this month, expect about 41 mm (1.6 in) of precipitation over the course of 6 days, accompanied by an average humidity level of 76%.

January Temperature in Oregon

In January in Oregon, the average temperature is -2°C (29°F), with maximums that can reach 17°C (62°F) and minimums that can drop as low as -27°C (-16°F). It's essential to pack warmly and be prepared for a wide range of temperatures when traveling to Oregon during this time.

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 -2°C (29°F), with highs reaching up to 17°C (62°F) and lows dropping to around -27°C (-16°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 precipitation amount is 41 mm (1.6 in) over the course of 6 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 41 mm (1.6 inches) of precipitation spread over approximately 6 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 76%. With an average temperature of -2°C (29°F), this humidity feels like a biting chill that seeps into your bones, making outdoor activities less enjoyable and requiring extra layers to stay warm while exploring.

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 76%, 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	-2°C (29°F)	41 mm (1.6 inches)	76%	moderate
February Weather	-1°C (30°F)	31 mm (1.2 inches)	77%	moderate
March Weather	7°C (45°F)	92 mm (3.6 inches)	70%	high
April Weather	12°C (53°F)	82 mm (3.2 inches)	73%	very high
May Weather	18°C (65°F)	168 mm (6.6 inches)	82%	very high
June Weather	25°C (77°F)	132 mm (5.2 inches)	82%	extreme
July Weather	26°C (79°F)	119 mm (4.7 inches)	81%	extreme
August Weather	24°C (76°F)	110 mm (4.3 inches)	78%	very high
September Weather	22°C (71°F)	83 mm (3.2 inches)	71%	very high
October Weather	13°C (56°F)	123 mm (4.8 inches)	71%	high
November Weather	6°C (43°F)	40 mm (1.6 inches)	81%	moderate
December Weather	2°C (36°F)	32 mm (1.3 inches)	84%	moderate