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January Weather in Corvallis, United States

Last updated: June 24, 2025

In Corvallis, United States, the average temperature in January hovers around -5°C (23°F). The climate can be quite extreme, with minimum temperatures plunging to -29°C (-20°F) and occasionally peaking at 6°C (43°F). Visitors should be prepared for wet weather, as the area sees approximately 43 mm (1.7 in) of precipitation spread over 11 days. Despite the chill, the average humidity remains high at 93%, creating a unique atmosphere throughout the month.

January Temperature in Corvallis

In January in Corvallis, the average temperature is -5°C (23°F), with maximums reaching 6°C (43°F) and minimums dropping as low as -29°C (-20°F). Be prepared for extremely cold weather and pack accordingly if you plan to travel during this month.

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

The chart illustrates January temperature patterns in Corvallis, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Corvallis, January typically has an average temperature of -5°C (23°F), with highs reaching up to 6°C (43°F) and lows dropping to around -29°C (-20°F).
JanFebMarAprMayJunJulAugSepOctNovDec232232364756666455392922
Data source: Temperature data for Corvallis generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

January Precipitation in Corvallis

In Corvallis in January, the total precipitation amount is 43 mm (1.7 in) recorded over a span of 11 days.

January Precipitation Trends in Corvallis

The chart displays monthly precipitation patterns in Corvallis, 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 Corvallis, January typically receives around 43 mm (1.7 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec439860697277172134655863
Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.
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January Humidity in Corvallis

In Corvallis in January humidity is 93%. With an average temperature of -5°C (23°F), this humidity feels like a biting, frosty chill that permeates through layers of clothing, making outdoor adventures uncomfortable and travel challenging.

January Average Humidity in Corvallis

This chart illustrates the average monthly humidity levels in Corvallis, 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 Corvallis is approximately 93%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec93%92%89%85%80%78%77%66%67%77%89%95%
Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in Corvallis

In Corvallis 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 Corvallis, you can check the information here.

Maximum UV Index Levels in Corvallis for January

The chart shows the monthly maximum UV Index (UVI) for Corvallis 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 Corvallis typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec346810101098532
Data source: Corvallis 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 Corvallis Compares to Other Months

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

This table compares monthly weather conditions in Corvallis, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-5°C (23°F)43 mm (1.7 inches)93%moderate
February Weather-5°C (23°F)98 mm (3.9 inches)92%moderate
March Weather0°C (32°F)60 mm (2.4 inches)89%high
April Weather2°C (36°F)69 mm (2.7 inches)85%very high
May Weather8°C (47°F)72 mm (2.8 inches)80%very high
June Weather14°C (57°F)77 mm (3.0 inches)78%very high
July Weather19°C (66°F)17 mm (0.7 inches)77%very high
August Weather18°C (65°F)21 mm (0.8 inches)66%very high
September Weather13°C (55°F)34 mm (1.3 inches)67%very high
October Weather4°C (39°F)65 mm (2.5 inches)77%moderate
November Weather-1°C (30°F)58 mm (2.3 inches)89%moderate
December Weather-6°C (22°F)62 mm (2.5 inches)95%low

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