September Weather in West Sacramento, United States

Last updated: June 24, 2025

In September, the average temperature in West Sacramento, United States is a pleasant 23°C (74°F), making it an ideal time to explore the outdoors. However, temperatures can fluctuate, with minimums dipping to 9°C (48°F) and soaring as high as 44°C (111°F). Expect minimal rain, with only 2 mm (0.1 in) of precipitation over 0 days, and enjoy the relatively low average humidity of 44% for a comfortable stay.

September Temperature in West Sacramento

In September in West Sacramento, the average temperature is 23°C (74°F), with maximums reaching up to 44°C (111°F) and minimums dropping as low as 9°C (48°F). Travelers should be prepared for a wide range of temperatures, so packing layers is advisable.

September Weather in West Sacramento: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in West Sacramento, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In West Sacramento, September typically has an average temperature of 23°C (74°F), with highs reaching up to 44°C (111°F) and lows dropping to around 9°C (48°F).

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

September Precipitation in West Sacramento

In West Sacramento in September, the precipitation amount is 2 mm (0.1 in) during a span of 0 days.

September Precipitation Trends in West Sacramento

The chart displays monthly precipitation patterns in West Sacramento, 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 West Sacramento, September typically receives around 2 mm (0.1 inches) of precipitation spread over approximately 0 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 West Sacramento

In West Sacramento in September humidity is 44%. With an average temperature of 23°C (74°F), this humidity feels like a comfortable embrace, making it pleasant for traveling and exploring the sights without feeling overly hot or sticky.

September Average Humidity in West Sacramento

This chart illustrates the average monthly humidity levels in West Sacramento, 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 West Sacramento 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 West Sacramento

In West Sacramento 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 West Sacramento.

Maximum UV Index Levels in West Sacramento for September

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

Data source: West Sacramento 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 West Sacramento Compares to Other Months

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

This table compares monthly weather conditions in West Sacramento, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	10°C (50°F)	122 mm (4.8 inches)	84%	moderate
February Weather	11°C (53°F)	109 mm (4.3 inches)	84%	moderate
March Weather	13°C (56°F)	97 mm (3.8 inches)	83%	high
April Weather	17°C (63°F)	44 mm (1.7 inches)	81%	very high
May Weather	20°C (69°F)	20 mm (0.8 inches)	74%	very high
June Weather	24°C (76°F)	3 mm (0.1 inches)	64%	extreme
July Weather	25°C (77°F)	0 mm (0.0 inches)	44%	extreme
August Weather	25°C (76°F)	0 mm (0.0 inches)	36%	very high
September Weather	23°C (74°F)	2 mm (0.1 inches)	44%	very high
October Weather	19°C (66°F)	39 mm (1.5 inches)	65%	high
November Weather	13°C (56°F)	54 mm (2.1 inches)	84%	moderate
December Weather	9°C (49°F)	103 mm (4.1 inches)	83%	moderate