The highest day temperature in September 2026 was 88°F. The lowest night temperature was 76°F. The average values for day and night temperatures during September were 85.3°F и 78.3°F respectivly.

The average sea surface temperature in September 2026 for Santa Cruz Island was 82.6°F. The maximum and minimum values were 81.2°F and 86.0°F respectively.

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

Precipitation total in September for Santa Cruz Island is 0.0 in. It makes september one of the least rainy months of the year.

The average wind speed in September is 10.5 mph. It makes September one of the most windy months of the year for Santa Cruz Island.

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 Cruz Island in September is 5.5 hours.