September Weather in Yuba City, United States

Last updated: June 24, 2025

In September, the average temperature in Yuba City, United States is a pleasant 24°C (75°F). However, be prepared for a range of conditions, as temperatures can dip to a minimum of 8°C (47°F) and soar to a scorching 43°C (110°F). During this time, you can expect an average precipitation of 6 mm (0.2 in) over the course of just 1 day, and the humidity sits at a comfortable 44%.

September Temperature in Yuba City

In September in Yuba City, the average temperature is 24°C (75°F). Maximum temperatures can reach 43°C (110°F), while minimums can drop to as low as 8°C (47°F). It's advisable to pack for both warm and cool weather conditions when traveling to Yuba City during this time.

September Weather in Yuba City: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Yuba City, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Yuba City, September typically has an average temperature of 24°C (75°F), with highs reaching up to 43°C (110°F) and lows dropping to around 8°C (47°F).

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

September Precipitation in Yuba City

In Yuba City in September, the precipitation amount is 6 mm (0.2 in) over the course of 1 day.

September Precipitation Trends in Yuba City

The chart displays monthly precipitation patterns in Yuba City, 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 Yuba City, September typically receives around 6 mm (0.2 inches) of precipitation spread over approximately 1 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 Yuba City

In Yuba City in September humidity is 44%. With average temperature 24°C (75°F), this humidity feels like a refreshing embrace, making it comfortable for traveling as you explore the vibrant streets and soak in the local culture.

September Average Humidity in Yuba City

This chart illustrates the average monthly humidity levels in Yuba City, 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 Yuba City 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 Yuba City

In Yuba City 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 Yuba City.

Maximum UV Index Levels in Yuba City for September

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

Data source: Yuba City 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 Yuba City Compares to Other Months

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

This table compares monthly weather conditions in Yuba City, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	9°C (49°F)	154 mm (6.1 inches)	84%	moderate
February Weather	11°C (51°F)	155 mm (6.1 inches)	84%	moderate
March Weather	13°C (55°F)	145 mm (5.7 inches)	83%	high
April Weather	17°C (62°F)	68 mm (2.7 inches)	81%	very high
May Weather	21°C (70°F)	36 mm (1.4 inches)	74%	very high
June Weather	26°C (79°F)	6 mm (0.2 inches)	64%	extreme
July Weather	28°C (83°F)	1 mm (0.0 inches)	44%	very high
August Weather	27°C (81°F)	0 mm (0.0 inches)	36%	very high
September Weather	24°C (75°F)	6 mm (0.2 inches)	44%	very high
October Weather	18°C (65°F)	48 mm (1.9 inches)	65%	high
November Weather	13°C (55°F)	82 mm (3.2 inches)	84%	moderate
December Weather	9°C (48°F)	130 mm (5.1 inches)	83%	moderate