The highest day temperature in September 2025 was 77°F. The lowest night temperature was 68°F. The average values for day and night temperatures during September were 72.5°F и 72.0°F respectivly.

The average sea surface temperature in September 2025 for Corvo Island was 75.1°F. The maximum and minimum values were 73.8°F and 76.2°F respectively.

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

Precipitation total in September for Corvo Island is 1.8 in. It makes september one of the least rainy months of the year.

The average wind speed in September is 15.1 mph. It makes September one of the most windless months of the year for Corvo Island.

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 Corvo Island in September is 6.1 hours.