The highest day temperature in September 2026 was 64°F. The lowest night temperature was 44°F. The average values for day and night temperatures during September were 54.5°F и 51.8°F respectivly.

The average sea surface temperature in September 2026 for Piriapolis was 56.0°F. The maximum and minimum values were 54.2°F and 58.6°F respectively.

You can expect various weather conditions during September. Be ready for sunny, cloudy or even gloomy days.

Precipitation total in September for Piriapolis is 1.3 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 Piriapolis in September is 6.7 hours.