Sri Lanka · 30-year monthly climate averages
Based on 30 years of climate data, the most comfortable months to visit Colombo are January, February and August, when daytime temperatures are agreeable and rainfall is relatively low.
Colombo sees its warmest weather in March, when daytime highs average around 32°C, and its coolest in July (around 30°C).
Annual precipitation totals roughly 2397mm — October is typically the wettest month (~359mm) and February the driest (~77mm).
A distinctly wetter period runs from April to December — worth planning around if you prefer dry days.
🟧 avg daytime high · 🟦 dashed: avg nighttime low · bars: monthly rainfall
Daily forecast highs vs the 30-year normal — last 61 days
Each bar is one day: orange above normal, blue below.
| Month | High / Low | Rainfall | Travel rating |
|---|---|---|---|
| January | 31° / 23°C | 80mm | 👍 Good |
| February | 32° / 24°C | 77mm | 👍 Good |
| March | 32° / 25°C | 103mm | 🤔 Fair |
| April | 32° / 25°C | 249mm | ⚠️ Challenging |
| May | 32° / 26°C | 314mm | ⚠️ Challenging |
| June | 31° / 26°C | 197mm | ⚠️ Challenging |
| July | 30° / 26°C | 123mm | 🤔 Fair |
| August | 30° / 26°C | 116mm | 🤔 Fair |
| September | 30° / 25°C | 264mm | ⚠️ Challenging |
| October | 30° / 25°C | 359mm | ⚠️ Challenging |
| November | 31° / 24°C | 346mm | ⚠️ Challenging |
| December | 31° / 24°C | 171mm | 🤔 Fair |
January in Colombo is hot, with average daytime highs around 31°C (89°F) and nighttime lows near 23°C (74°F). Expect roughly 80mm of precipitation spread over about 5 rainy days, with a moderate amount of rain.
🎒 What to pack — breathable summer clothing · sunscreen, hat and sunglasses · refillable water bottle
February in Colombo is hot, with average daytime highs around 32°C (89°F) and nighttime lows near 24°C (74°F). Expect roughly 77mm of precipitation spread over about 5 rainy days, with a moderate amount of rain.
🎒 What to pack — breathable summer clothing · sunscreen, hat and sunglasses · refillable water bottle
March in Colombo is hot, with average daytime highs around 32°C (90°F) and nighttime lows near 25°C (77°F). Expect roughly 103mm of precipitation spread over about 8 rainy days, with a moderate amount of rain.
🎒 What to pack — breathable summer clothing · sunscreen, hat and sunglasses · refillable water bottle
April in Colombo is hot, with average daytime highs around 32°C (90°F) and nighttime lows near 25°C (78°F). Expect roughly 249mm of precipitation spread over about 13 rainy days, and heavy rainfall is common — this is peak wet season territory.
🎒 What to pack — breathable summer clothing · sunscreen, hat and sunglasses · refillable water bottle · compact umbrella or rain jacket
May in Colombo is hot, with average daytime highs around 32°C (89°F) and nighttime lows near 26°C (79°F). Expect roughly 314mm of precipitation spread over about 17 rainy days, and heavy rainfall is common — this is peak wet season territory.
🎒 What to pack — breathable summer clothing · sunscreen, hat and sunglasses · refillable water bottle · compact umbrella or rain jacket
June in Colombo is hot, with average daytime highs around 31°C (87°F) and nighttime lows near 26°C (79°F). Expect roughly 197mm of precipitation spread over about 15 rainy days, and heavy rainfall is common — this is peak wet season territory.
🎒 What to pack — breathable summer clothing · sunscreen, hat and sunglasses · refillable water bottle · compact umbrella or rain jacket
July in Colombo is hot, with average daytime highs around 30°C (87°F) and nighttime lows near 26°C (79°F). Expect roughly 123mm of precipitation spread over about 10 rainy days, and this is one of the wetter months.
🎒 What to pack — breathable summer clothing · sunscreen, hat and sunglasses · refillable water bottle · compact umbrella or rain jacket
August in Colombo is hot, with average daytime highs around 30°C (87°F) and nighttime lows near 26°C (79°F). Expect roughly 116mm of precipitation spread over about 10 rainy days, and this is one of the wetter months.
🎒 What to pack — breathable summer clothing · sunscreen, hat and sunglasses · refillable water bottle · compact umbrella or rain jacket
September in Colombo is hot, with average daytime highs around 30°C (87°F) and nighttime lows near 25°C (78°F). Expect roughly 264mm of precipitation spread over about 15 rainy days, and heavy rainfall is common — this is peak wet season territory.
🎒 What to pack — breathable summer clothing · sunscreen, hat and sunglasses · refillable water bottle · compact umbrella or rain jacket
October in Colombo is hot, with average daytime highs around 30°C (87°F) and nighttime lows near 25°C (76°F). Expect roughly 359mm of precipitation spread over about 19 rainy days, and heavy rainfall is common — this is peak wet season territory.
🎒 What to pack — breathable summer clothing · sunscreen, hat and sunglasses · refillable water bottle · compact umbrella or rain jacket
November in Colombo is hot, with average daytime highs around 31°C (87°F) and nighttime lows near 24°C (75°F). Expect roughly 346mm of precipitation spread over about 16 rainy days, and heavy rainfall is common — this is peak wet season territory.
🎒 What to pack — breathable summer clothing · sunscreen, hat and sunglasses · refillable water bottle · compact umbrella or rain jacket
December in Colombo is hot, with average daytime highs around 31°C (88°F) and nighttime lows near 24°C (74°F). Expect roughly 171mm of precipitation spread over about 9 rainy days, and this is one of the wetter months.
🎒 What to pack — breathable summer clothing · sunscreen, hat and sunglasses · refillable water bottle · compact umbrella or rain jacket