The highest day temperature in September 2026 was 79°F. The lowest night temperature was 56°F. The average values for day and night temperatures during September were 65.6°F и 60.9°F respectivly.

The average sea surface temperature in September 2026 for Sausalito was 65.9°F. The maximum and minimum values were 64.0°F and 69.6°F respectively.

Most of the days in September are sunny but you can also expect cloudy and gloomy days.

Precipitation total in September for Sausalito is 0.1 in. It makes september one of the least rainy months of the year.

The average wind speed in September is 7.3 mph. It makes September one of the most windless months of the year for Sausalito.

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Sausalito in September is 9.3 hours.