Best Time to Visit Colombo
The best time to visit Colombo is January to March and June to August, when the average temperature is 25–27°C and rainfall is low for Colombo, at 71–143 mm a month.
Colombo weather by month
The wettest month in Colombo is November with 305 mm of rain, and the warmest is April at an average 28°C. The coolest is January at 25°C.
| Month | Average temperature | Rainfall | Verdict |
|---|---|---|---|
| January | 25°C / 78°F | 76 mm | Best |
| February | 26°C / 79°F | 71 mm | Best |
| March | 27°C / 81°F | 115 mm | Best |
| April | 28°C / 82°F | 226 mm | Wet |
| May | 27°C / 81°F | 224 mm | Wet |
| June | 27°C / 80°F | 143 mm | Best |
| July | 26°C / 79°F | 99 mm | Best |
| August | 26°C / 79°F | 113 mm | Best |
| September | 26°C / 79°F | 162 mm | Wet |
| October | 26°C / 79°F | 292 mm | Wet |
| November | 26°C / 79°F | 305 mm | Wet |
| December | 26°C / 78°F | 175 mm | Wet |
How we pick the best months
- Best: an average temperature of 15–28°C and low rainfall for Colombo: under 150 mm, and no more than 191 mm, a quarter above Colombo's median month (never set below 60 mm).
- If no month qualifies, we show the three driest months that average 10–30°C instead.
- Wet: 150 mm of rain or more. Rainy: more than 191 mm. Hot: 29°C or more on average. Cool: under 15°C. Cold: under 5°C.
Averages cover day and night, so afternoons are warmer than the figure shown. Weather is only one reason to pick a month: school holidays, festivals and prices matter too.
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Where these numbers come from
Monthly averages for January 2001 – December 2020 from the NASA POWER project, for the area around Bandaranaike (CMB) at 7.18, 79.88. The model covers a grid about 50 km across, so a coastal or hilly spot can run a degree or two different. Retrieved 12 September 2026.
The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center (LaRC) Prediction of Worldwide Energy Resource (POWER) Project funded through the NASA Earth Science/Applied Science Program.