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September Weather in Davis, United States

Last updated: June 24, 2025

In September, the average temperature in Davis, United States is a pleasant 19°C (66°F). However, be prepared for a range, as temperatures can drop to a chilly 2°C (36°F) or soar to a warm 33°C (91°F). Expect about 117 mm (4.6 in) of precipitation spread over 9 days, contributing to an average humidity level of 79%.

September Temperature in Davis

In September in Davis, the average temperature is 19°C (66°F), with maximums reaching up to 33°C (91°F) and minimums dipping as low as 2°C (36°F). This makes it a great time for travelers to enjoy a mix of warm days and cool nights, perfect for exploring the local sights.

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 19°C (66°F), with highs reaching up to 33°C (91°F) and lows dropping to around 2°C (36°F).
JanFebMarAprMayJunJulAugSepOctNovDec222437476071757266523730
Data source: Temperature data for Davis generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Davis

In Davis in September, the total precipitation amount is 117 mm (4.6 in) spread over a period of 9 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 117 mm (4.6 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec58556510114212081951171104551
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Davis

In Davis in September humidity is 79%. With an average temperature of 19°C (66°F), this humidity feels like a warm embrace, making it feel much warmer than the actual temperature and creating a heavy, sticky atmosphere that can be a bit uncomfortable for traveling.

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 79%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%85%85%85%78%80%78%76%79%83%88%82%
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 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to 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 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec34689101098532
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.
 TemperaturePrecipitationHumidityUV
January Weather-5°C (22°F)58 mm (2.3 inches)85%moderate
February Weather-4°C (24°F)55 mm (2.2 inches)85%moderate
March Weather3°C (38°F)65 mm (2.6 inches)85%high
April Weather8°C (47°F)101 mm (4.0 inches)85%very high
May Weather16°C (60°F)142 mm (5.6 inches)78%very high
June Weather22°C (72°F)120 mm (4.7 inches)80%very high
July Weather24°C (75°F)81 mm (3.2 inches)78%very high
August Weather22°C (72°F)95 mm (3.7 inches)76%very high
September Weather19°C (66°F)117 mm (4.6 inches)79%very high
October Weather11°C (52°F)110 mm (4.3 inches)83%moderate
November Weather3°C (37°F)45 mm (1.8 inches)88%moderate
December Weather-1°C (31°F)51 mm (2.0 inches)81%low

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