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

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