The highest day temperature in July 2025 was 69°F. The lowest night temperature was 64°F. The average values for day and night temperatures during July were 66.7°F и 67.2°F respectivly.

The average sea surface temperature in July 2025 for Santa Catalina Island was 70.0°F. The maximum and minimum values were 67.0°F and 71.2°F respectively.

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

Precipitation total in July for Santa Catalina Island is 0.0 in. It makes july the least rainy month of the year.

The average wind speed in July is 6.8 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 Catalina Island in July is 11.3 hours.