The highest day temperature in May 2023 was 94°F. The lowest night temperature was 81°F. The average values for day and night temperatures during May were 90.3°F и 84.0°F respectivly.

The average sea surface temperature in May 2023 for Dehiwala Mount Lavinia was 89.6°F. The maximum and minimum values were 88.6°F and 90.6°F respectively.

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

Precipitation total in May for Dehiwala Mount Lavinia is 15.4 in. It makes may one of the most rainy months of the year.

The average wind speed in May is 10.0 mph.

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 May is 5.6 hours.