The highest day temperature in September 2026 was 90°F. The lowest night temperature was 53°F. The average values for day and night temperatures during September were 78.0°F и 62.9°F respectivly.

The average sea surface temperature in September 2026 for Arenzano was 82.2°F. The maximum and minimum values were 77.6°F and 85.4°F respectively.

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

Precipitation total in September for Arenzano is 1.1 in.

The average wind speed in September is 5.2 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 Arenzano in September is 8.0 hours.