The highest day temperature in September 2023 was 91°F. The lowest night temperature was 64°F. The average values for day and night temperatures during September were 79.0°F и 69.8°F respectivly.

The average sea surface temperature in September 2023 for Irvine was 69.9°F. The maximum and minimum values were 65.4°F and 73.0°F respectively.

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

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

The average wind speed in September is 5.0 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 Irvine in September is 11.4 hours.