Kalutara Weather & Climate: Best Time to Visit

With minimal seasonal shifts, Kalutara experiences a constant climate year-round. Typically, average maximum daytime temperatures range from a very warm 32°C (90°F) in March to a comfortable 30°C (86°F) in the coolest month, July.

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

Kalutara has a notably wet climate with abundant precipitation, recording 2885 mm (114 in) of rainfall per year. The climate in Kalutara shows significant variation throughout the year. Expect heavy rainfall in October, the wettest month, with an average of 362 mm (14 in) of precipitation over 15 rainy days.

In contrast, the driest month February offers drier and sunnier days, with around 84 mm (3.3 in) of rainfall over 5 rainy days. For more details, please visit our Kalutara Precipitation page.

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

The average number of days each month with precipitation

Kalutara 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

The relative humidity is high throughout the year in Kalutara.

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