January Weather in Cathlamet, United States

Last updated: June 24, 2025

In January, the average temperature in Cathlamet, United States hovers around 6°C (42°F). Expect a range between a chilly -7°C (19°F) and a milder 14°C (57°F). This month also brings 214 mm (8.4 in) of precipitation over 17 days, with an average humidity of 86%, creating a damp and cool atmosphere.

January Temperature in Cathlamet

In January in Cathlamet, the average temperature is 6°C (42°F), with maximums reaching 14°C (57°F) and minimums dropping as low as -7°C (19°F). Travelers should be prepared for chilly weather and dress in layers to stay comfortable during their visit.

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

The chart illustrates January temperature patterns in Cathlamet, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Cathlamet, January typically has an average temperature of 6°C (42°F), with highs reaching up to 14°C (57°F) and lows dropping to around -7°C (19°F).

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

January Precipitation in Cathlamet

In Cathlamet in January, the precipitation amount is 214 mm (8.4 in) over the course of 17 days.

January Precipitation Trends in Cathlamet

The chart displays monthly precipitation patterns in Cathlamet, 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 Cathlamet, January typically receives around 214 mm (8.4 inches) of precipitation spread over approximately 17 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 Cathlamet

In Cathlamet in January, humidity is 86%. With an average temperature of 6°C (42°F), this humidity feels like a chilly, damp embrace that can make outdoor activities feel uncomfortable and chilly, prompting travelers to seek shelter or warm clothing to stay cozy while exploring.

January Average Humidity in Cathlamet

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

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

Maximum UV Index Levels in Cathlamet for January

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

Data source: Cathlamet 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 Cathlamet Compares to Other Months

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

This table compares monthly weather conditions in Cathlamet, 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 (42°F)	214 mm (8.4 inches)	86%	low
February Weather	5°C (41°F)	192 mm (7.5 inches)	84%	moderate
March Weather	7°C (45°F)	149 mm (5.9 inches)	85%	moderate
April Weather	10°C (50°F)	134 mm (5.3 inches)	83%	high
May Weather	12°C (55°F)	74 mm (2.9 inches)	84%	very high
June Weather	15°C (59°F)	62 mm (2.5 inches)	84%	very high
July Weather	16°C (62°F)	11 mm (0.4 inches)	82%	very high
August Weather	17°C (63°F)	12 mm (0.5 inches)	73%	very high
September Weather	16°C (60°F)	91 mm (3.6 inches)	74%	high
October Weather	11°C (52°F)	151 mm (5.9 inches)	83%	moderate
November Weather	8°C (46°F)	212 mm (8.3 inches)	86%	moderate
December Weather	5°C (41°F)	229 mm (9.0 inches)	87%	low