March Weather in Cathlamet, United States

Last updated: June 24, 2025

In March, the average temperature in Cathlamet, United States is a brisk 7°C (45°F). Expect a temperature range where it can dip to a chilling -2°C (30°F) or soar up to a pleasant 22°C (71°F). With an average precipitation of 149 mm (5.9 in) over 18 days, be prepared for some wet weather. The humidity is notably high at 85%, so dress accordingly!

March Temperature in Cathlamet

In March in Cathlamet, the average temperature is 7°C (45°F). Maximums can reach 22°C (71°F), and minimums can be as low as -2°C (30°F). Be prepared for a wide range of temperatures, making it essential to pack layers for your travels.

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

The chart illustrates March 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, March typically has an average temperature of 7°C (45°F), with highs reaching up to 22°C (71°F) and lows dropping to around -2°C (30°F).

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

March Precipitation in Cathlamet

In Cathlamet in March, the total precipitation amount is 149 mm (5.9 in) spread over 18 days.

March Precipitation Trends in Cathlamet

The chart displays monthly precipitation patterns in Cathlamet, with values for each month alongside March’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how March’s conditions compare to those of other months. In Cathlamet, March typically receives around 149 mm (5.9 inches) of precipitation spread over approximately 18 days.

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

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Millimeters (mm) Inches (in)

March Humidity in Cathlamet

In Cathlamet in March, humidity is 85%. With an average temperature of 7°C (45°F), this humidity feels like a damp chill that clings to your skin, making outdoor activities less enjoyable and requiring extra layers to stay comfortable while traveling.

March Average Humidity in Cathlamet

This chart illustrates the average monthly humidity levels in Cathlamet, with March’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In March, average humidity in Cathlamet is approximately 85%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for March generated using information from the Copernicus Climate Change Service.

March UV Index in Cathlamet

In Cathlamet in March, the maximum UV index reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the Hourly UV Index in Cathlamet.

Maximum UV Index Levels in Cathlamet for March

The chart shows the monthly maximum UV Index (UVI) for Cathlamet in March, 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 March, the maximum UV index in Cathlamet typically reaches 5, which falls under the moderate exposure category.

Data source: Cathlamet March 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 March 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 March’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 March’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