Monthly weather forecast and climate
Dehiwala, Sri Lanka

How many days does it rain in Dehiwala?

In Dehiwala, Sri Lanka, during the entire year, the rain falls for 139 days and collects up to 2402mm (94.6") of precipitation.

What is the driest month in Dehiwala?

The month with the least rainfall in Dehiwala is January when the rain falls for 5 days and typically collects 55mm (2.2") of precipitation.

What is the warmest month in Dehiwala?

March and April, with an average high-temperature of 32°C (89.6°F), are warmest months in Dehiwala, Sri Lanka.

When is the sea warmest in Dehiwala?

April is the month with the warmest seawater in Dehiwala, with an average sea temperature of 29.6°C (85.3°F). Water temperature between 25°C (77°F) and 29°C (84.2°F) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

What is the rainiest month in Dehiwala?

The month with the most rainfall in Dehiwala, Sri Lanka, is May when the rain falls for 14 days and typically aggregates up to 382mm (15") of precipitation.

What are the coldest months in Dehiwala?

June through December, with an average high-temperature of 30°C (86°F), are the coldest months in Dehiwala.

When is the sea coldest in Dehiwala?

With an average sea temperature of 27.2°C (81°F), August is the month with the coldest seawater. For swimming, diving, and other water activities, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.
Average temperature - Dehiwala, Sri Lanka

Warmest months (with the highest average high temperature) are March and April (32°C).
Months with the lowest average high temperature are June, July, August, September, October, November and December (30°C).

Months with the highest average low temperature are May, June, July, August and September (25°C).
Coldest months (with the lowest average low temperature) are January and December (22°C).

Average rainfall - Dehiwala, Sri Lanka
Average rainfall days - Dehiwala, Sri Lanka

The month with the highest number of rainy days is October (16 days).
Months with the lowest number of rainy days are January and February (5 days).

Average sea temperature - Dehiwala, Sri Lanka

The best month for swimming (with the highest average sea temperature) is April (29.6°C).
The coldest month (with the lowest average sea temperature) is August (27.2°C).

Average daylight / Average sunshine - Dehiwala, Sri Lanka

Months with the longest days are June and July (Average daylight: 12.5h).
The month with shortest days is December (Average daylight: 11.7h).

Months with most sunshine are February and March (Average sunshine: 9h).
Months with least sunshine are May, June, July, August, September and October (Average sunshine: 6).

Average UV index - Dehiwala, Sri Lanka

Months with the highest UV index are February, March, April, May, June, July, August, September and October (UV index 12).
Months with the lowest UV index are January, November and December (UV index 11).

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