Colombo Sri Lanka weather is a tropical rainforest one. Its climate is temperate all year. Between March and April the average temperature around the city is around 31-degrees Celsius (88-degrees Fahrenheit. The only change to the weather in Colombo occurs between May and August, the city’s monsoon season.
If you are looking for the best time to take a trip to Colombo, be sure to come between the rainy seasons. Between November and April is the dry season. You will find some of the best locations on the south-west coast. November to April is considered the best time to visit the city.