Colombo Monthly Climate

Colombo has a tropical monsoon climate with consistently warm temperatures throughout the year. Located on Sri Lanka's western coast, the city experiences high humidity and significant rainfall influenced by two monsoon seasons. The weather remains warm and tropical year-round, with slight variations in temperature and distinct wet and dry periods.

Don't forget to check WhereWeather Website for weather statistics on your exact travel dates, for any city in the world. You can also compare different cities and dates side-by-side.

Temperature Overview

Average Daytime Temperature: 31°C (88°F)
Average Nighttime Temperature: 25°C (77°F)

Rainfall Statistics

Annual average daily rainfall: 6.2 mm (0.244 inches) per day
Rainiest month: October with around 13.5 mm (0.531 inches) per day
Driest month: February with around 1.8 mm (0.071 inches) per day
Average number of rainy days per year: 170 days

Monthly Weather Conditions

Temperature

Precipitation

Seasonal Breakdown

December-March (Northeast Monsoon)

Highs: 30-32°C (86-90°F)
Lows: 24-25°C (75-77°F)
Rainy Days: 6-12 days per month
Average Precipitation: 3.4 mm/day
Relatively dry period with occasional showers

April-May (First Inter-monsoon)

Highs: 31-32°C (88-90°F)
Lows: 25-26°C (77-79°F)
Rainy Days: 14-16 days per month
Average Precipitation: 8.5 mm/day
Increased rainfall with thunderstorms

June-September (Southwest Monsoon)

Highs: 30-31°C (86-88°F)
Lows: 25°C (77°F)
Rainy Days: 14-16 days per month
Average Precipitation: 7.2 mm/day
Consistent rainfall with strong winds

October-November (Second Inter-monsoon)

Highs: 30°C (86°F)
Lows: 24-25°C (75-77°F)
Rainy Days: 16-18 days per month
Average Precipitation: 12.9 mm/day
Heaviest rainfall of the year

Best Time to Visit

The best time to visit Colombo is during the December to March period when the weather is relatively dry and sunny. However, each season offers unique experiences:

December-March (Northeast Monsoon) is considered the peak tourist season with the most favorable weather conditions. The temperatures are warm but comfortable, and rainfall is at its lowest. This period is ideal for beach activities, city exploration, and outdoor sightseeing. January and February are particularly pleasant with clear skies and lower humidity.

April-May (First Inter-monsoon) brings increased rainfall but still offers plenty of sunshine between showers. This is a good time to experience the Sinhala and Tamil New Year festivities in April. Morning activities are recommended, as afternoon thunderstorms are common.

June-September (Southwest Monsoon) sees steady rainfall and stronger winds, but the rain patterns are often predictable with sunny mornings. This is low season, offering better hotel rates and fewer tourists. The city's colonial architecture and indoor attractions can be enjoyed during this period.

October-November (Second Inter-monsoon) experiences the heaviest rainfall of the year. While this isn't ideal for outdoor activities, it's when the city is at its most lush and green. Indoor activities, cultural sites, and shopping in Colombo's many malls are recommended during this period.

Before you go ahead and plan your next visit, make sure to check the weather forecast for your exact travel dates on WhereWeather Website. You can also compare different cities and dates side-by-side.