The highest day temperature in September 2026 was 94°F. The lowest night temperature was 61°F. The average values for day and night temperatures during September were 80.0°F и 69.2°F respectivly.

The average sea surface temperature in September 2026 for Rethymno was 83.1°F. The maximum and minimum values were 80.2°F and 85.2°F respectively.

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

Precipitation total in September for Rethymno is 0.3 in. It makes september one of the least rainy months of the year.

The average wind speed in September is 8.0 mph. It makes September one of the most windless months of the year for Rethymno.

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 Rethymno in September is 10.8 hours.