August Weather in Cathlamet, United States

Last updated: June 24, 2025

In August, the average temperature in Cathlamet, United States hovers around 17°C (63°F), providing a pleasant climate. Expect minimums of 10°C (50°F) and maximums soaring to 32°C (89°F). With an average humidity of 73%, it’s a great time to explore despite the occasional rain, as precipitation amounts to 12 mm (0.5 in) over just 4 days.

August Temperature in Cathlamet

In August in Cathlamet, the average temperature is 17°C (63°F). Maximum temperatures can reach 32°C (89°F), while minimums can drop as low as 10°C (50°F). This mild climate makes Cathlamet an ideal destination for travelers looking to enjoy a range of outdoor activities.

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

The chart illustrates August 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, August typically has an average temperature of 17°C (63°F), with highs reaching up to 32°C (89°F) and lows dropping to around 10°C (50°F).

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

August Precipitation in Cathlamet

In Cathlamet in August, the precipitation amount is 12 mm (0.5 in) over a span of 4 days.

August Precipitation Trends in Cathlamet

The chart displays monthly precipitation patterns in Cathlamet, with values for each month alongside August’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how August’s conditions compare to those of other months. In Cathlamet, August typically receives around 12 mm (0.5 inches) of precipitation spread over approximately 4 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

August Humidity in Cathlamet

In Cathlamet in August humidity is 73%. With an average temperature of 17°C (63°F), this humidity feels like a warm embrace, making it ideal for leisurely strolling through vibrant markets or exploring outdoor attractions, though travelers may want to stay hydrated and take breaks in shaded areas to fully enjoy the atmosphere.

August Average Humidity in Cathlamet

This chart illustrates the average monthly humidity levels in Cathlamet, with August’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In August, average humidity in Cathlamet is approximately 73%, offering insight into how humid the weather typically is during this month.

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

August UV Index in Cathlamet

In Cathlamet in August, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Cathlamet.

Maximum UV Index Levels in Cathlamet for August

The chart shows the monthly maximum UV Index (UVI) for Cathlamet in August, 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 August, the maximum UV index in Cathlamet typically reaches 8, which falls under the very high exposure category.

Data source: Cathlamet August 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 August 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 August’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 August’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