Gilroy
California, USA
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Gilroy, CA

A colorful sunset sky over the hilly region of Gilroy in California
A colorful sunset sky over the hilly region of Gilroy in California
The first month of the autumn, September, is also a hot month in Gilroy, California, with average temperature fluctuating between 53.1°F (11.7°C) and 86°F (30°C).

Temperature

In September, the average high-temperature is almost the same as in August - a still hot 86°F (30°C). In Gilroy, in September, the average low-temperature is 53.1°F (11.7°C).

Rainfall

In September, the rain falls for 1 days. Throughout September, 0.3" (8.1mm) of precipitation is accumulated. In Gilroy, during the entire year, the rain falls for 36 days and collects up to 20.8" (528.9mm) of precipitation.

Daylight

In Gilroy, the average length of the day in September is 12.4h.

What is the temperature in September in Gilroy?

In Gilroy, California, in September, the average high-temperature is 86°F (30°C), and the average low-temperature is 53.1°F (11.7°C).

How much does it rain in Gilroy in September?

In September, the rain falls for 1 days. Throughout September, 0.3" (8.1mm) of precipitation is accumulated.

What is the average length of the day in September in Gilroy?

The average length of the day in September is 12.4h.
Average temperature in September - Gilroy, CA
  • Average high temperature in September: 86°F

Warmest months (with the highest average high temperature) are July and August (88°F).
Months with the lowest average high temperature are January and December (60°F).

  • Average low temperature in September: 53°F

Months with the highest average low temperature are July and August (54°F).
Coldest months (with the lowest average low temperature) are January and December (37°F).

Average rainfall in September - Gilroy, CA
  • Average rainfall in September: 0.3"

The wettest month (with the highest rainfall) is January (4.7").
Driest months (with the lowest rainfall) are June, July and August (0.1").

Average rainfall days in September - Gilroy, CA
  • Average rainfall days in September: 1 days

The month with the highest number of rainy days is January (7 days).
Months with the lowest number of rainy days are June, July and August (0 days).

Average daylight in September - Gilroy, CA
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 14.7h).
The month with shortest days is December (Average daylight: 9.7h).