September Weather in Downieville, United States

Last updated: June 24, 2025

In September, the average temperature in Downieville, United States is a mild 17°C (62°F). However, temperatures can vary dramatically, with minimums dipping to -1°C (31°F) and maximums soaring to 35°C (95°F). Expect around 28 mm (1.1 in) of precipitation spread over 4 days, and enjoy an average humidity level of 44% during this time.

September Temperature in Downieville

In September in Downieville, the average temperature is 17°C (62°F), with maximums reaching 35°C (95°F) and minimums dipping as low as -1°C (31°F). This variability makes Downieville a destination where travelers should be prepared for both warm and chilly weather.

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

The chart illustrates September temperature patterns in Downieville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Downieville, September typically has an average temperature of 17°C (62°F), with highs reaching up to 35°C (95°F) and lows dropping to around -1°C (31°F).

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

September Precipitation in Downieville

In Downieville in September, the precipitation amount is 28 mm (1.1 in) over the course of 4 days.

September Precipitation Trends in Downieville

The chart displays monthly precipitation patterns in Downieville, 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 Downieville, September typically receives around 28 mm (1.1 inches) of precipitation spread over approximately 4 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 Downieville

In Downieville in September, humidity is 44%. With an average temperature of 17°C (62°F), this humidity feels like a refreshing breeze, making it an ideal time for traveling and exploring the sights.

September Average Humidity in Downieville

This chart illustrates the average monthly humidity levels in Downieville, 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 Downieville is approximately 44%, 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 Downieville

In Downieville in September, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Downieville.

Maximum UV Index Levels in Downieville for September

The chart shows the monthly maximum UV Index (UVI) for Downieville 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 Downieville typically reaches 10, which falls under the very high exposure category.

Data source: Downieville 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 Downieville Compares to Other Months

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

This table compares monthly weather conditions in Downieville, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	2°C (35°F)	269 mm (10.6 inches)	84%	moderate
February Weather	2°C (36°F)	279 mm (11.0 inches)	84%	moderate
March Weather	3°C (38°F)	261 mm (10.3 inches)	83%	very high
April Weather	7°C (45°F)	130 mm (5.1 inches)	81%	very high
May Weather	11°C (53°F)	85 mm (3.4 inches)	74%	extreme
June Weather	17°C (63°F)	19 mm (0.8 inches)	64%	extreme
July Weather	22°C (71°F)	8 mm (0.3 inches)	44%	extreme
August Weather	21°C (70°F)	11 mm (0.4 inches)	36%	extreme
September Weather	17°C (62°F)	28 mm (1.1 inches)	44%	very high
October Weather	10°C (51°F)	72 mm (2.8 inches)	65%	high
November Weather	6°C (42°F)	148 mm (5.8 inches)	84%	moderate
December Weather	2°C (35°F)	215 mm (8.5 inches)	83%	moderate