January Weather in Keizer, United States

Last updated: June 24, 2025

In Keizer, United States, the average temperature in January is a crisp 6°C (43°F). Expect temperatures to vary between a chilly -9°C (16°F) and a mild 16°C (61°F). This month brings with it 141 mm (5.5 in) of precipitation spread over 16 days, contributing to a high average humidity of 85%. Prepare for a blend of cold air and wet days!

January Temperature in Keizer

In January in Keizer, the average temperature is 6°C (43°F). The maximum can reach 16°C (61°F), while the minimum can dip as low as -9°C (16°F). Be sure to pack warm clothing and layers for your travels, as the weather can vary significantly during this time.

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

The chart illustrates January temperature patterns in Keizer, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Keizer, January typically has an average temperature of 6°C (43°F), with highs reaching up to 16°C (61°F) and lows dropping to around -9°C (16°F).

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

January Precipitation in Keizer

In Keizer in January, the precipitation amount is 141 mm (5.5 in) accumulated over 16 days.

January Precipitation Trends in Keizer

The chart displays monthly precipitation patterns in Keizer, 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 Keizer, January typically receives around 141 mm (5.5 inches) of precipitation spread over approximately 16 days.

Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

January Humidity in Keizer

In Keizer in January, humidity is 85%. With an average temperature of 6°C (43°F), this humidity feels like a damp chill that seeps into your bones, making travel feel more uncomfortable and limiting your enjoyment of the sights as you navigate the wet, brisk air.

January Average Humidity in Keizer

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

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

Maximum UV Index Levels in Keizer for January

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

Data source: Keizer 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 Keizer Compares to Other Months

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

This table compares monthly weather conditions in Keizer, 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 (43°F)	141 mm (5.5 inches)	85%	low
February Weather	6°C (43°F)	159 mm (6.3 inches)	84%	moderate
March Weather	8°C (47°F)	116 mm (4.6 inches)	85%	moderate
April Weather	11°C (52°F)	101 mm (4.0 inches)	83%	high
May Weather	15°C (59°F)	47 mm (1.9 inches)	83%	very high
June Weather	18°C (65°F)	33 mm (1.3 inches)	83%	very high
July Weather	22°C (71°F)	3 mm (0.1 inches)	82%	very high
August Weather	22°C (72°F)	4 mm (0.2 inches)	74%	very high
September Weather	18°C (65°F)	53 mm (2.1 inches)	71%	high
October Weather	12°C (54°F)	82 mm (3.2 inches)	81%	moderate
November Weather	9°C (48°F)	124 mm (4.9 inches)	87%	moderate
December Weather	6°C (42°F)	173 mm (6.8 inches)	87%	low