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September Weather in Los Gatos, United States

Last updated: June 24, 2025

In September, the average temperature in Los Gatos, United States hovers around 19°C (67°F), with a comfortable average humidity of 55%. Expect minimum temperatures to dip to 7°C (45°F) and soar to a maximum of 41°C (106°F) on warmer days. Precipitation is quite low, with just 3 mm (0.1 in) recorded over 0 days, making it a great time to enjoy the outdoors!

September Temperature in Los Gatos

In September in Los Gatos, the average temperature is 19°C (67°F). Maximum temperatures can reach 41°C (106°F), while the minimum can drop as low as 7°C (45°F). Be prepared for a wide range of temperatures and pack accordingly for your travels.

September Weather in Los Gatos: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Los Gatos, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Los Gatos, September typically has an average temperature of 19°C (67°F), with highs reaching up to 41°C (106°F) and lows dropping to around 7°C (45°F).
JanFebMarAprMayJunJulAugSepOctNovDec505153565964666766635550
Data source: Temperature data for Los Gatos 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 Los Gatos

In Los Gatos in September, the precipitation amount is 3 mm (0.1 in) during a total of 0 days.

September Precipitation Trends in Los Gatos

The chart displays monthly precipitation patterns in Los Gatos, 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 Los Gatos, September typically receives around 3 mm (0.1 inches) of precipitation spread over approximately 0 days.
JanFebMarAprMayJunJulAugSepOctNovDec145133114372410132556116
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Los Gatos

In Los Gatos in September, humidity is 55%. With an average temperature of 19°C (67°F), this humidity feels like a refreshing embrace, perfect for leisurely strolls and outdoor adventures.

September Average Humidity in Los Gatos

This chart illustrates the average monthly humidity levels in Los Gatos, 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 Los Gatos is approximately 55%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%84%82%78%71%64%59%54%55%62%78%80%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Los Gatos

In Los Gatos 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 Los Gatos.

Maximum UV Index Levels in Los Gatos for September

The chart shows the monthly maximum UV Index (UVI) for Los Gatos 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 Los Gatos typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec4589111111109753
Data source: Los Gatos 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 Los Gatos Compares to Other Months

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

This table compares monthly weather conditions in Los Gatos, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather10°C (51°F)145 mm (5.7 inches)82%moderate
February Weather11°C (52°F)133 mm (5.2 inches)84%moderate
March Weather11°C (53°F)114 mm (4.5 inches)82%very high
April Weather13°C (56°F)37 mm (1.4 inches)78%very high
May Weather15°C (59°F)24 mm (0.9 inches)71%extreme
June Weather18°C (64°F)1 mm (0.0 inches)64%extreme
July Weather19°C (66°F)0 mm (0.0 inches)58%extreme
August Weather19°C (67°F)0 mm (0.0 inches)54%very high
September Weather19°C (67°F)3 mm (0.1 inches)55%very high
October Weather17°C (63°F)25 mm (1.0 inches)62%high
November Weather13°C (56°F)56 mm (2.2 inches)78%moderate
December Weather10°C (50°F)116 mm (4.6 inches)80%moderate

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