The highest day temperature in September 2025 was 91°F. The lowest night temperature was 80°F. The average values for day and night temperatures during September were 88.1°F и 80.8°F respectivly.

The average sea surface temperature in September 2025 for Weligama was 86.9°F. The maximum and minimum values were 85.4°F and 87.8°F respectively.

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

Precipitation total in September for Weligama is 10.9 in. It makes september the most rainy month of the year.

The average wind speed in September is 12.4 mph. It makes September one of the most windy months of the year for Weligama.

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 Weligama in September is 5.2 hours.