December
Best time
30°C / 23°C
12 rain days
hot, rainy
- outside peak hazard season
Best time to visit Colombo
Colombo, Sri Lanka — ranked month by month from data: temperature, rainfall, snow, and peak hazard seasons. The standouts: December.
Best · December
About Colombo
Colombo is Sri Lanka's executive and judicial capital, as well as the country's most populous city. It is also the financial centre of the island and a tourist destination. The Colombo metropolitan area is estimated to have a population of 5.6 million, and 752,993 within the municipal limits.
— condensed from Wikipedia
Best months to visit
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OK — shoulder months
February
OK
31°C / 22°C
6 rain days
hot
- very low rainfall (only 6 rain days)
- outside peak hazard season
- warm evenings without humidity overload
January
OK
31°C / 22°C
8 rain days
hot
- manageable rain (8 days)
- outside peak hazard season
- warm evenings without humidity overload
July
OK
29°C / 25°C
15 rain days
hot, rainy
- outside peak hazard season
August
OK
29°C / 25°C
15 rain days
hot, rainy
- outside peak hazard season
March
OK
32°C / 23°C
10 rain days
hot, rainy
- manageable rain (10 days)
- outside peak hazard season
September
OK
30°C / 25°C
16 rain days
hot, very wet
- outside peak hazard season
November
OK
30°C / 23°C
18 rain days
hot, very wet
- outside peak hazard season
April
OK
32°C / 24°C
15 rain days
hot, rainy
- outside peak hazard season
Months to skip
June
Skip
30°C / 25°C
19 rain days
hot, very wet
- extremely wet (19 rain days)
October
Skip
30°C / 24°C
21 rain days
hot, very wet
- extremely wet (21 rain days)
May
Skip
31°C / 25°C
21 rain days
hot, very wet
- very hot (31°C)
- extremely wet (21 rain days)
How we ranked these
Each month is scored on temperature comfort (18–27°C avg high is the sweet spot), rainfall (more rain days = lower score), snow days, and peak hazard seasons (hurricanes, monsoons, etc.). Green-tier months are within ideal range with no major issues. Yellow are workable but with trade-offs. Red has at least one significant problem — extreme heat or cold, heavy rain, or peak storm season.