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Dehiwala Weather and Climate: A Comprehensive Guide

Dehiwala has a steady very warm climate throughout the year. It is also known for its large amounts of rainfall. Let’s explore the climate details in depth to provide you with a complete overview.

Average maximum day and minimum night temperature

In Dehiwala temperatures are generally consistent throughout the year. Typically, average maximum daytime temperatures range from a very warm 33°C in March to a comfortable 30°C in the coolest month, January.

Nights are cooler, with lows often dropping to around 24°C during the colder months.

Check out our detailed temperature page for more information.

Temperature ranges by month

Precipitation and rainy days

Dehiwala experiences significant rainfall throughout the year, averaging 2638 mm of precipitation annually. The climate in Dehiwala shows significant variation throughout the year. Expect heavy rainfall in October, with an average of 355 mm of precipitation over 16 rainy days.

In contrast, January offers drier and sunnier days, with around 74 mm of rainfall over 5 rainy days. For more details, please visit our Dehiwala Precipitation page.

The mean monthly precipitation over the year, including rain, hail and snow

Sunshine over the year

Dehiwala offers a pleasant mix of sunny and slightly overcast days. The difference in sunshine hours between March (9.2 hours daily) and September (6.3 hours daily) provides a bit of variety for visitors and residents.

Visit our detailed sunshine hours page for more information.

Monthly hours of sunshine

Data from: Colombo, Sri Lanka (5 KM, 3 Miles).

Daily hours of sunshine

Data from: Colombo, Sri Lanka (5 KM, 3 Miles).

Average water temperature

The mean water temperature over the year ranges from 26°C in August to 28°C in January.

Water temperature over the year

Data from: Colombo, Sri Lanka (5 KM, 3 Miles).

Forecast for Dehiwala

Friday
14 Feb
Light rain showers
Light rain showers
29°C
1.4 mm
Saturday
15 Feb
Partly cloudy
Partly cloudy
30°C
0 mm
Sunday
16 Feb
Cloudy
Cloudy
29°C
0 mm

Select a Month of Interest

Check the conditions for any month of the year.

The best time of year to visit Dehiwala in Sri Lanka

Dehiwala has high temperatures year round ranging between 29°C and 32°C.
Other facts from our historical weather data:
  • Which is the hottest month in Dehiwala?
    March has an average maximum temperature of 33°C and is the hottest month of the year.
  • Which is the coolest month in Dehiwala?
    The coolest month is January with an average maximum temperature of 30°C.
  • Which is the wettest month in Dehiwala?
    October tops the wettest month list with 355 mm of rainfall.
  • Which is the driest month in Dehiwala?
    January is the driest month with 74 mm of precipitation.
  • Which is the sunniest month in Dehiwala?
    March is the sunniest month with an average of 276 hours of sunshine.

  • No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.