September Weather in Davis, United States

Last updated: June 24, 2025

In Davis, United States, the average temperature in September is a pleasant 17°C (63°F), with temperatures ranging between a chilly 1°C (34°F) and a warm 29°C (84°F). Expect an average of 120 mm (4.7 in) of precipitation spread over roughly 12 days, contributing to an average humidity level of 68%. Whether you're planning outdoor activities or cozy indoor retreats, this month's weather will offer a bit of everything!

September Temperature in Davis

In September in Davis, the average temperature is 17°C (63°F), with maximums reaching 29°C (84°F) and minimums dropping as low as 1°C (34°F). It's a great time to visit for those who enjoy mild weather and a mix of warm and cool conditions.

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

The chart illustrates September temperature patterns in Davis, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Davis, September typically has an average temperature of 17°C (63°F), with highs reaching up to 29°C (84°F) and lows dropping to around 1°C (34°F).

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

September Precipitation in Davis

In Davis in September, the precipitation amount is 120 mm (4.7 in) over a period of 12 days.

September Precipitation Trends in Davis

The chart displays monthly precipitation patterns in Davis, 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 Davis, September typically receives around 120 mm (4.7 inches) of precipitation spread over approximately 12 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 Davis

In Davis in September humidity is 68%. With an average temperature of 17°C (63°F), this humidity feels like a warm, gentle embrace, making it perfect for exploring local attractions but slightly challenging for outdoor activities during the hottest parts of the day.

September Average Humidity in Davis

This chart illustrates the average monthly humidity levels in Davis, 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 Davis is approximately 68%, 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 Davis

In Davis 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 Davis.

Maximum UV Index Levels in Davis for September

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

Data source: Davis 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 Davis Compares to Other Months

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

This table compares monthly weather conditions in Davis, 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 (29°F)	97 mm (3.8 inches)	86%	moderate
February Weather	1°C (34°F)	151 mm (6.0 inches)	86%	moderate
March Weather	4°C (39°F)	125 mm (4.9 inches)	86%	high
April Weather	9°C (49°F)	153 mm (6.0 inches)	84%	very high
May Weather	15°C (59°F)	169 mm (6.6 inches)	78%	very high
June Weather	19°C (66°F)	142 mm (5.6 inches)	79%	extreme
July Weather	21°C (70°F)	109 mm (4.3 inches)	70%	extreme
August Weather	20°C (68°F)	127 mm (5.0 inches)	59%	very high
September Weather	17°C (63°F)	120 mm (4.7 inches)	68%	very high
October Weather	12°C (54°F)	120 mm (4.7 inches)	80%	high
November Weather	4°C (39°F)	89 mm (3.5 inches)	86%	moderate
December Weather	1°C (34°F)	128 mm (5.1 inches)	85%	moderate