Chilaw Temperature by Month
Chilaw, Puttalam District, Sri Lanka has a consistently very warm climate year-round, with daytime highs averaging 31°C (88°F). Below you'll find a full monthly breakdown and a comparison with cities worldwide.
Chilaw Monthly Temperatures
The temperature in Chilaw changes very little across the seasons, maintaining a similar climate throughout the year. Maximum daytime temperatures range from a comfortable 30°C (86°F) in January to a very warm 33°C (91°F) in March. Nighttime lows range from 26°C (79°F) in March to 24°C (75°F) in January.
The chart below illustrates the average maximum day and minimum night temperatures in Chilaw by month:
The coolest part of the day is typically between 4 AM and 6 AM, while 3 PM is usually the warmest, when solar heating is at its peak.
The chart below shows the average temperature throughout the year:
Temperature: Chilaw vs Sri Lanka
The map below shows the annual temperature across Sri Lanka. You can also select individual months if you want to compare a specific time of year.
very warm
warm
pleasant
moderate
cold
very cold
Chilaw vs World: Temperature Compared
Chilaw's average annual maximum temperature is 31°C (88°F). To put that in context, here's how it compares to a few well-known destinations:
Lisbon, Portugal averages 21°C (70°F) annually — warm summers, mild winters, and rain mainly in the cooler months.
Zermatt, Switzerland averages just 4°C (39°F) annually due to its altitude, with very cold winters and cool summers even at its warmest.
Boston, USA averages 16°C (61°F) annually, with four distinct seasons and cold winters that rival northern Europe.
Tokyo, Japan averages 21°C (70°F) a year, with hot summers, cool winters, and a well-defined cherry blossom spring.
Climate temperature data is typically calculated as a 30-year average. This smooths out year-to-year variability and gives a more reliable picture of what a place is actually like, rather than what happened in any single unusual year.
The readings come from a range of sources — land-based weather stations, ocean buoys, ships, and satellites. That data is collected by weather services around the world, then pooled, quality-checked, and averaged to produce the climate records you see here.
Whether a city sits on the coast or deep inland makes a significant difference to its climate. Coastal areas tend to have more stable temperatures year-round — large bodies of water absorb heat slowly in summer and release it gradually in winter, keeping extremes in check. Cities far from the sea don't benefit from that buffer, which is why continental climates tend to have hotter summers and colder winters than their coastal counterparts at the same latitude.
For more on Chilaw's weather — including monthly rainfall, sunshine hours, and humidity — visit our Chilaw climate page.
