Climate averages 1991–2020

Weather in Sri Lanka.

ClimaNote covers 12 cities in Sri Lanka, starting with Colombo, Dehiwala-Mount Lavinia and Jaffna. Open a city for charts and a table of all 12 months, or open a month for a side-by-side comparison of cities in the atlas.

Across these cities the yearly average high ranges from 27.2°C in Kandy to 31.2°C in Batticaloa, and yearly rainfall from 945 mm in Point Pedro to 2,370 mm in Dehiwala-Mount Lavinia. The hottest city-month is June in Batticaloa, with an average high of 34.5°C (tied with July in Batticaloa), and the coolest is December in Kandy, at 25.5°C. By single month, the most rain falls in November in Dehiwala-Mount Lavinia, with 330 mm, and the least in June in Point Pedro, with 17 mm.

March is the warmest month in 6 cities, April in 1, May in 1 and June in 1 (in 3 other cities two or more months tie); January is the coolest in 4 cities, August in 3 and December in 2 (in 3 other cities two or more months tie). November is the wettest month in 7 cities, October in 2, December in 2 and May in 1; February is the driest in 4 cities, June in 3, January in 2, March in 1 and July in 1 (in 1 other city two or more months tie). Of these cities, 7 have a month with more than 300 mm of rain; none has a month with an average high below 2.0°C or a month with under 1 mm of rain.