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

September weather forecast and climate
Graton, CA

September, the first month of the autumn, in Graton, is still a warm month, with temperature in the range of an average low of 46.9°F (8.3°C) and an average high of 82.6°F (28.1°C).

Temperature

In Graton, the average high-temperature is essentially the same as in August - a still warm 82.6°F (28.1°C). In September, in Graton, the average low-temperature is 46.9°F (8.3°C).

Rainfall

In Graton, in September, during 2 rainfall days, 0.4" (8.9mm) of precipitation is typically accumulated. Throughout the year, there are 77 rainfall days, and 40.8" (1035.3mm) of precipitation is accumulated.

Daylight

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

What is the temperature in September in Graton?

In September, in Graton, California, the average high-temperature is 82.6°F (28.1°C), and the average low-temperature is 46.9°F (8.3°C).

How many days does it rain in September in Graton?

In September, in Graton, the rain falls for 2 days. Throughout September, 0.4" (8.9mm) of precipitation is accumulated.

How many hours of daylight does Graton have in September?

In Graton, the average length of the day in September is 12.4h.
Average temperature in September - Graton, CA
  • Average high temperature in September: 82.5°F

The warmest month (with the highest average high temperature) is August (83.5°F).
The month with the lowest average high temperature is January (56.2°F).

  • Average low temperature in September: 47°F

The month with the highest average low temperature is July (48.5°F).
The coldest month (with the lowest average low temperature) is January (35.9°F).

Average rainfall in September - Graton, CA
  • Average rainfall in September: 0.4"

The wettest month (with the highest rainfall) is January (8.7").
The driest month (with the lowest rainfall) is July (0").

Average rainfall days in September - Graton, CA
  • Average rainfall days in September: 2 days

The month with the highest number of rainy days is January (13 days).
The month with the lowest number of rainy days is July (0 days).

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

The month with the longest days is June (Average daylight: 14.8h).
The month with shortest days is December (Average daylight: 9.5h).