The highest day temperature in September 2023 was 89°F. The lowest night temperature was 61°F. The average values for day and night temperatures during September were 76.8°F и 66.5°F respectivly.

The average sea surface temperature in September 2023 for Santa Monica was 70.5°F. The maximum and minimum values were 68.2°F and 72.8°F respectively.

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

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

The average wind speed in September is 5.9 mph. This value is relatively stable throughout the year.

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 Santa Monica in September is 10.2 hours.