The highest day temperature in July 2025 was 88°F. The lowest night temperature was 78°F. The average values for day and night temperatures during July were 85.6°F и 81.9°F respectivly.

The average sea surface temperature in July 2025 for Dehiwala Mount Lavinia was 86.2°F. The maximum and minimum values were 84.4°F and 89.0°F respectively.

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

Precipitation total in July for Dehiwala Mount Lavinia is 12.2 in.

The average wind speed in July is 11.2 mph. It makes July one of the most windy months of the year for Dehiwala Mount Lavinia.

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 Dehiwala Mount Lavinia in July is 5.3 hours.