When is the best time to go to Chilaw?

When is the best time to go to Chilaw? Here's some information to help you in your decision:

  • The best months for good weather in Chilaw are January, February, March and December
  • On average, the warmest months are January, February, March, April, May, June, July, September, October, November and December
  • The rainiest months are May, June, July and August
  • The sea temperature is suitable for swimming all year round

Annual weather in Chilaw

For full information about the climate and weather in Chilaw a specific month, click on the corresponding line below:

January 79°F/88°F
February 81°F/92°F
March 85°F/92°F
April 85°F/92°F
May 85°F/88°F
June 83°F/86°F
July 83°F/86°F
August 83°F/86°F
September 83°F/86°F
October 83°F/88°F
November 81°F/88°F
December 81°F/88°F

Weather and climate in Chilaw

Chilaw enjoys a tropical monsoon climate in accordance with the Köppen-Geiger classification. The yearly average maximum temperature in Chilaw is 88°F (ranging from 86°F in august to 92°F in march). Annual rainfall is 148.7in, with a minimum of 3.4in in february and a maximum of 20.3in in june.
  • From january to march the climate is favorable. The record temperature this month is 99°F and it rains in march about 5.2in.
  • Between the months of april and december the climate is correct. The temperature rises to 88°F and you can expect to have 9.4in of rainfall/month during this period.

Charts: temperature and rainfall in Chilaw

In the charts below, you can see the following seasonal norms for the city of Chilaw: the minimum and maximum outdoor temperature, the risk and amount of monthly rainfall, daily average sunshine, sea temperature, and relative humidity for each month of the year.

Outside temperature

Precipitation (rainfall)

Daily sunshine hours

Sea temperature


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