Dehiwala Weather in May

Dehiwala in May averages 31°C (88°F) during the day and 26°C (79°F) at night. May is part of the rainy season, so frequent rainfall is typical.

Rainfall in Dehiwala in May

As part of the rainy season, Dehiwala sees around 14 days of rain in May, with an average of 298 mm (12 in). Rainy season showers here are typically intense, often clearing quickly but coming down hard while they last.

Temperature in Dehiwala in May

Temperatures in Dehiwala in May top out at 31°C (88°F) and drop to 26°C (79°F) overnight. If you're spending a lot of time outdoors, it helps to plan around the warmer part of the day. Nights are warm at 26°C (79°F), which can make sleeping uncomfortable. Keeping windows open or using a fan can help. A cold shower before bed is also a good way to cool down.

Sunshine in Dehiwala in May

There are approximately 202 hours of sunshine this month, despite being the rainy season. Rain often arrives in the late afternoon or evening, keeping mornings and early afternoons sunny. Even during the wet season, it could still be a nice time to visit.

Wind Speed in Dehiwala in May

May sees wind speeds averaging 2 m/s (4 knots). You'll typically experience pleasant light breezes that move leaves slightly and feel refreshing. As an average, expect variation from very calm days to periods with more apparent air movement.

Average water temperature in May

With water at 28°C (82°F), you can expect warm, pleasant conditions for any water activity. There's no adjustment period, it feels comfortable straight away.

May in Dehiwala can still be great, but if you prefer pleasant temperatures along with dry and sunny conditions, our weather planner can help you explore other options in the world.