September Weather in Dunsmuir, United States

Last updated: June 24, 2025

In September, the average temperature in Dunsmuir, United States is a pleasant 17°C (63°F). Expect a range from a brisk -1°C (30°F) at night to a warm 36°C (96°F) during the day. While you'll enjoy some sunshine, be prepared for 23 mm (0.9 in) of precipitation over approximately 4 days. The average humidity sits comfortably at 46%, making it a great time to explore!

September Temperature in Dunsmuir

In September in Dunsmuir, the average temperature is 17°C (63°F). The maximum can reach 36°C (96°F), while the minimum can dip as low as -1°C (30°F). Travelers should be prepared for a wide range of temperatures, ensuring they pack both lightweight clothing for warm days and warmer layers for cooler nights.

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

The chart illustrates September temperature patterns in Dunsmuir, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Dunsmuir, September typically has an average temperature of 17°C (63°F), with highs reaching up to 36°C (96°F) and lows dropping to around -1°C (30°F).

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

September Precipitation in Dunsmuir

In Dunsmuir in September, the total precipitation amount is 23 mm (0.9 in) over a span of 4 days.

September Precipitation Trends in Dunsmuir

The chart displays monthly precipitation patterns in Dunsmuir, 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 Dunsmuir, September typically receives around 23 mm (0.9 inches) of precipitation spread over approximately 4 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

September Humidity in Dunsmuir

In Dunsmuir in September, humidity is 46%. With an average temperature of 17°C (63°F), this humidity feels like a mild embrace—comfortable for exploring the sights, though you might notice a slight heaviness in the air that encourages a leisurely pace as you take in the vibrant surroundings.

September Average Humidity in Dunsmuir

This chart illustrates the average monthly humidity levels in Dunsmuir, 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 Dunsmuir is approximately 46%, 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 Dunsmuir

In Dunsmuir in September, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Dunsmuir.

Maximum UV Index Levels in Dunsmuir for September

The chart shows the monthly maximum UV Index (UVI) for Dunsmuir 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 Dunsmuir typically reaches 9, which falls under the very high exposure category.

Data source: Dunsmuir 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 Dunsmuir Compares to Other Months

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

This table compares monthly weather conditions in Dunsmuir, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	1°C (35°F)	227 mm (8.9 inches)	86%	moderate
February Weather	2°C (36°F)	218 mm (8.6 inches)	87%	moderate
March Weather	3°C (38°F)	204 mm (8.0 inches)	86%	very high
April Weather	7°C (45°F)	121 mm (4.8 inches)	83%	very high
May Weather	12°C (54°F)	87 mm (3.4 inches)	72%	extreme
June Weather	18°C (64°F)	27 mm (1.1 inches)	67%	extreme
July Weather	23°C (73°F)	5 mm (0.2 inches)	56%	extreme
August Weather	22°C (71°F)	9 mm (0.4 inches)	42%	very high
September Weather	17°C (63°F)	23 mm (0.9 inches)	46%	very high
October Weather	10°C (51°F)	76 mm (3.0 inches)	67%	high
November Weather	5°C (42°F)	128 mm (5.1 inches)	86%	moderate
December Weather	1°C (34°F)	153 mm (6.0 inches)	86%	moderate