Dehiwala Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Dehiwala.
Climate overview of Dehiwala
The climate in Dehiwala, Colombo District, Sri Lanka, is remarkably consistent, with temperatures year-round averaging 31°C (88°F). The warmest month is March at 33°C (91°F), and the coolest is January at 30°C (86°F).
The city receives considerable rainfall, with around 2638 mm (104 in) annually. October is the wettest month. Sunshine peaks in March, when the city sees around 9.2 hours of sunshine per day.
Dehiwala Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Dehiwala — and find the best time to visit.
Monthly Temperature in Dehiwala
In Dehiwala temperatures are generally consistent throughout the year. Typically, average maximum daytime temperatures range from a very warm 33°C (91°F) in March to a comfortable 30°C (86°F) in the coolest month, January.
Nights vary from 26°C (79°F) in March to around 24°C (75°F) during the colder months.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Dehiwala
Dehiwala experiences significant rainfall throughout the year, averaging 2638 mm (104 in) of precipitation annually. The climate in Dehiwala shows significant variation throughout the year. Expect heavy rainfall in October, the wettest month, with an average of 355 mm (14 in) of precipitation over 16 rainy days.
In contrast, the driest month January offers drier and sunnier days, with around 74 mm (2.9 in) 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
The average number of days each month with precipitation
Sunshine Hours in Dehiwala
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
Daily hours of sunshine
Water Temperature in Dehiwala
The mean water temperature over the year ranges from 26°C (79°F) in August to 28°C (82°F) in January.
Water temperature over the year
Humidity in Dehiwala by Month
The relative humidity is high throughout the year in Dehiwala.
The city experiences its highest humidity in June, reaching 79%. In February, the humidity drops to its lowest level at 69%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Wind Speed in Dehiwala
The mean wind speed varies between 1 m/s (2 knots) and 2 m/s (4 knots) throughout the year. It is lowest in February, March, April, October, November and December and highest during January, May, June, July, August and September. What does this mean?
The mean monthly wind speed over the year (meters per second)
Best Time to Visit Dehiwala
To make the most of your visit, consider exploring early in the morning or during the pleasant late afternoon hours when the temperature is most comfortable. Ready to plan your travels but need destination ideas? Our smart tool recommends places based on the climate conditions you prefer. Start planning with our destination weather tool.
Frequently asked questions about the climate in Dehiwala
What is the best time to visit Dehiwala?
January and February typically offer the most optimal weather in Dehiwala. In contrast, April, May, June, July, August, September, October, November and December tend to have less optimal conditions.
What temperatures can I expect in Dehiwala?
Daytime highs range from 30°C (86°F) in January to 33°C (91°F) in March. Nighttime lows range from 24°C (75°F) to 26°C (79°F). Temperatures stay relatively stable year-round.
How much rain does Dehiwala get?
Annual rainfall is around 2638 mm (104 in). October is the wettest month with 355 mm (14 in), while January is the driest with 74 mm (2.9 in).
How sunny is Dehiwala?
Dehiwala receives around 2,623 hours of sunshine per year. March is the sunniest month with 276 hours, while September is the cloudiest with just 189 hours. Overall, Dehiwala enjoys abundant sunshine.
Dehiwala 3-Day Forecast
Dehiwala 3-Day Forecast
Dehiwala on the map
Dehiwala is highlighted — select any city to see its climate.
Popular this month
Where to go in July — average daytime high across popular destinations.
Colombo
30°C (86°F) Galle29°C (84°F) Mirissa29°C (84°F) Hikkaduwa29°C (84°F) Negombo30°C (86°F) Kandy
28°C (82°F) Unawatuna29°C (84°F) Nuwara Eliya27°C (81°F) 
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