September Weather in Clatskanie, United States

Last updated: June 24, 2025

In September, the average temperature in Clatskanie, United States is a pleasant 15°C (60°F). Expect a minimum of 5°C (42°F) and a maximum of 34°C (93°F), making it a month of variability. Rainfall averages around 82 mm (3.2 in) spread over 9 days, and with an average humidity of 71%, you'll feel the moisture in the air as you explore.

September Temperature in Clatskanie

In September in Clatskanie, the average temperature is 15°C (60°F), with maximums reaching 34°C (93°F) and minimums dropping as low as 5°C (42°F). It's a great time to visit for those who enjoy mild weather with the possibility of warm days.

September Weather in Clatskanie: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Clatskanie, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Clatskanie, September typically has an average temperature of 15°C (60°F), with highs reaching up to 34°C (93°F) and lows dropping to around 5°C (42°F).

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

September Precipitation in Clatskanie

In Clatskanie in September, the total precipitation amount is 82 mm (3.2 in), occurring over a span of 9 days.

September Precipitation Trends in Clatskanie

The chart displays monthly precipitation patterns in Clatskanie, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In Clatskanie, September typically receives around 82 mm (3.2 inches) of precipitation spread over approximately 9 days.

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

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Millimeters (mm) Inches (in)

September Humidity in Clatskanie

In Clatskanie in September humidity is 71%. With an average temperature of 15°C (60°F), this humidity feels like a warm blanket wrapped around you, making travel slightly uncomfortable as you feel sticky and sluggish.

September Average Humidity in Clatskanie

This chart illustrates the average monthly humidity levels in Clatskanie, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Clatskanie is approximately 71%, offering insight into how humid the weather typically is during this month.

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

September UV Index in Clatskanie

In Clatskanie in September, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Clatskanie.

Maximum UV Index Levels in Clatskanie for September

The chart shows the monthly maximum UV Index (UVI) for Clatskanie in September, 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 September, the maximum UV index in Clatskanie typically reaches 7, which falls under the high exposure category.

Data source: Clatskanie September 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 September Weather in Clatskanie Compares to Other Months

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

This table compares monthly weather conditions in Clatskanie, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	5°C (41°F)	186 mm (7.3 inches)	85%	low
February Weather	4°C (39°F)	174 mm (6.8 inches)	84%	moderate
March Weather	6°C (44°F)	147 mm (5.8 inches)	85%	moderate
April Weather	9°C (49°F)	129 mm (5.1 inches)	83%	high
May Weather	12°C (54°F)	76 mm (3.0 inches)	83%	very high
June Weather	15°C (59°F)	62 mm (2.4 inches)	83%	very high
July Weather	17°C (63°F)	10 mm (0.4 inches)	82%	very high
August Weather	18°C (64°F)	10 mm (0.4 inches)	74%	very high
September Weather	15°C (60°F)	82 mm (3.2 inches)	71%	high
October Weather	10°C (50°F)	122 mm (4.8 inches)	81%	moderate
November Weather	7°C (44°F)	177 mm (7.0 inches)	87%	moderate
December Weather	4°C (40°F)	201 mm (7.9 inches)	87%	low