The highest day temperature in September 2024 was 89°F. The lowest night temperature was 82°F. The average values for day and night temperatures during September were 86.5°F и 83.5°F respectivly.

The average sea surface temperature in September 2024 for Negombo was 88.0°F. The maximum and minimum values were 87.0°F and 89.4°F respectively.

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

Precipitation total in September for Negombo is 10.1 in. It makes september one of the most rainy months of the year.

The average wind speed in September is 11.8 mph. It makes September one of the most windy months of the year for Negombo.

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 Negombo in September is 5.1 hours.