The highest day temperature in September 2023 was 97°F. The lowest night temperature was 66°F. The average values for day and night temperatures during September were 83.2°F и 70.3°F respectivly.

The average sea surface temperature in September 2023 for Rio das Ostras was 72.7°F. The maximum and minimum values were 69.0°F and 75.2°F respectively.

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

Precipitation total in September for Rio das Ostras is 1.0 in.

The average wind speed in September is 9.7 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 Rio das Ostras in September is 7.2 hours.