The highest day temperature in September 2026 was 91°F. The lowest night temperature was 70°F. The average values for day and night temperatures during September were 79.5°F и 75.4°F respectivly.

The average sea surface temperature in September 2026 for Marseilles was 75.7°F. The maximum and minimum values were 70.4°F and 79.4°F respectively.

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

Precipitation total in September for Marseilles is 0.9 in. It makes september one of the least rainy months of the year.

The average wind speed in September is 10.9 mph. It makes September one of the most windless months of the year for Marseilles.

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 Marseilles in September is 10.3 hours.