- Temperature
- 24–33°C
Updated September 2026 · Sources cited: weather-and-climate.com, weather-atlas.com
Good to know
Good to Know
- January and February are considered the most comfortable months to visit, with less rain and moderate humidity.
- April, May, and June are the hottest and wettest months — expect intense heat combined with frequent monsoon rains.
- Humidity remains high year-round (69–83%), which can make mid-range temperatures feel more oppressive than the thermometer suggests.
- Annual sunshine is abundant (over 2,600 hours per year), but rainy-season months (May–October) have significantly fewer sunny hours.
- Sea temperature ranges from 27–30°C year-round, making swimming warm and pleasant any time of year.
Peak Month
- Month
- March
Daytime High
- Celsius
- 33
- Fahrenheit
- 91
Nighttime Low
- Celsius
- 24
- Fahrenheit
- 75
Off Peak Month
- Month
- July
Daytime High
- Celsius
- 30
- Fahrenheit
- 86
Nighttime Low
- Celsius
- 24
- Fahrenheit
- 75
Seasons
Dry Season
- Months
- January–February
- Characteristics
- Most favorable weather; lowest rainfall and humidity. Best time to visit for dry conditions.
Southwest Monsoon
- Months
- May–September
- Characteristics
- Heaviest rainfall, particularly May–June and August–October. High humidity (78–83%). Can expect frequent rain showers and overcast skies.
Transitional Periods
- March April
- Hot and humid, leading into the main monsoon. May is the wettest month overall.
- October December
- Tail end of monsoon season; still relatively wet but improving toward January.
Colombo features a tropical wet-and-dry climate with year-round warmth and high humidity. Temperatures remain relatively stable throughout the year, varying only by a few degrees. The city experiences two main seasonal patterns: a drier period (mainly January–February) and a wetter monsoon period (May–October), with no snowfall.
Snowfall
None. Colombo is a tropical coastal city; snowfall does not occur.
Sea Temperature
Coolest
- Month
- August
- Celsius
- 27
- Fahrenheit
- 81
Warmest
- Month
- April
- Celsius
- 30
- Fahrenheit
- 86
Rainfall Humidity
- Humidity Range
- High throughout the year (69–83% relative humidity). June–August are most humid (avg. 83%).
- Annual Rainfall Mm
- 2608
Driest Month
- Month
- January
- Rainfall Mm
- 71
Wettest Month
- Month
- October
- Rainfall Mm
- 355
AI-generated estimateData refreshed September 2026
Sources cited for this category
These are the sources cited in this climate & weather research for this city. Individual figures may not each trace to one of them.
More About Colombo
Data last updated September 2026 · Verify anything important.