The highest day temperature in September 2023 was 82°F. The lowest night temperature was 55°F. The average values for day and night temperatures during September were 77.6°F и 59.1°F respectivly.

The average sea surface temperature in September 2023 for Heredia was 89.6°F. The maximum and minimum values were 88.4°F and 90.2°F respectively.

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

Precipitation total in September for Heredia is 25.0 in. It makes september one of the most rainy months of the year.

The average wind speed in September is 2.5 mph. It makes September the most windless month of the year for Heredia.

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 Heredia in September is 4.9 hours.