Colombo, Sri Lanka: Annual Weather Averages
April is the hottest month in Colombo with an average temperature of 29°C (84°F) and the coldest is January at 27°C (81°F) with the most daily sunshine hours at 9 in March. The wettest month is May with an average of 382mm of rain. The best month to swim in the sea is in April when the average sea temperature is 30°C (86°F).
Average Temperature: Colombo
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| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| °C | 27 | 27 | 28 | 29 | 29 | 28 | 28 | 28 | 28 | 27 | 27 | 27 |
| °F | 81 | 81 | 82 | 84 | 84 | 82 | 82 | 82 | 82 | 81 | 81 | 81 |
Average High/Low Temperature: Colombo
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| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| High °C | 31 | 31 | 32 | 32 | 31 | 30 | 30 | 30 | 30 | 30 | 30 | 30 |
| Low °C | 22 | 23 | 24 | 25 | 26 | 26 | 25 | 25 | 25 | 24 | 23 | 23 |
| High °F | 88 | 88 | 90 | 90 | 88 | 86 | 86 | 86 | 86 | 86 | 86 | 86 |
| Low °F | 72 | 73 | 75 | 77 | 79 | 79 | 77 | 77 | 77 | 75 | 73 | 73 |
Average Day/Night Temperature: Colombo
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| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Day °C | 28 | 28 | 29 | 29 | 29 | 29 | 28 | 28 | 28 | 28 | 27 | 27 |
| Night °C | 26 | 26 | 28 | 28 | 28 | 28 | 28 | 27 | 27 | 27 | 26 | 26 |
| Day °F | 82 | 82 | 84 | 85 | 84 | 83 | 83 | 83 | 82 | 82 | 81 | 81 |
| Night °F | 78 | 79 | 82 | 83 | 83 | 82 | 82 | 81 | 81 | 80 | 78 | 78 |
Average Rainfall: Colombo
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| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| mm | 62 | 69 | 130 | 253 | 382 | 186 | 125 | 114 | 236 | 369 | 310 | 168 |
| Days | 7 | 4 | 8 | 14 | 16 | 14 | 11 | 9 | 13 | 19 | 16 | 10 |
Average Daily Sunshine Hours: Colombo
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| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Hours | 8 | 9 | 9 | 8 | 6 | 7 | 7 | 7 | 8 | 7 | 7 | 7 |
Average Sea Temperature: Colombo
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| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| °C | 28 | 28 | 29 | 30 | 29 | 28 | 28 | 28 | 28 | 28 | 29 | 28 |
| °F | 82 | 82 | 84 | 86 | 84 | 82 | 82 | 82 | 82 | 82 | 84 | 82 |
