The highest day temperature in September 2025 was 64°F. The lowest night temperature was 36°F. The average values for day and night temperatures during September were 55.5°F и 46.9°F respectivly.

The average sea surface temperature in September 2025 for Mar del Plata was 53.3°F. The maximum and minimum values were 51.4°F and 55.4°F respectively.

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

Precipitation total in September for Mar del Plata is 2.0 in.

The average wind speed in September is 11.9 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 Mar del Plata in September is 7.7 hours.