Colombo Weather in September
Sri Lanka · 30-year monthly averages
⚠️ Challenging time to visit
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.
Avg high
30°C
87°F
Avg low
25°C
78°F
Rainfall
264mm
very wet
Rainy days
15
days with ≥1mm
🎒 What to pack
- breathable summer clothing
- sunscreen, hat and sunglasses
- refillable water bottle
- compact umbrella or rain jacket
September vs the rest of the year
FAQ
- How hot is Colombo in September?
- 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.
- Does it rain a lot in Colombo in September?
- Colombo sees around 264mm of precipitation in September on average — very wet by global standards.
- Is September a good time to visit Colombo?
- September is a challenging month to visit Colombo weather-wise — plan around the conditions.