The highest day temperature in September 2025 was 85°F. The lowest night temperature was 77°F. The average values for day and night temperatures during September were 82.4°F и 78.8°F respectivly.

The average sea surface temperature in September 2025 for Olinda was 83.3°F. The maximum and minimum values were 82.6°F and 84.4°F respectively.

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

Precipitation total in September for Olinda is 1.0 in. It makes september one of the least rainy months of the year.

The average wind speed in September is 10.9 mph. It makes September the most windy month of the year for Olinda.

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 Olinda in September is 4.5 hours.