Weather in Colombo in September
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Book now, pay at pickup — compare Hertz, Avis, Budget, Sixt and 800+ rental companies for September in Colombo.
Compare car hire prices → Affiliate link — we earn a commission at no extra cost to youColombo in September is hot — daytime temperatures average 28.3°C, dropping to 24.7°C at night. The month is extremely wet, with heavy downpours most days, with roughly 8.3 hours of sunshine a day. It is one of the best months of the year to visit. For the complete picture, see the best time to visit Colombo — every month compared. Once you know when to go, find your Colombo packing list at 247PackingList.
Get ready for Colombo in September
Search flights to Colombo
Compare 100+ airlines for September — one search, best price.
Search Flights →Lightweight travel clothing
Lightweight, breathable clothing and a compact travel umbrella are essential in this climate.
Check Price →What to pack for Colombo in September
- Light layers
- Sunscreen
- T-shirts and light trousers or shorts
- Compact travel umbrella
- Waterproof jacket
- Quick-dry clothing
Compare all months in Colombo
| Month | High | Rain | Rating |
|---|---|---|---|
| January | 30.0°C | 115.3mm | 9/10 |
| February | 31.0°C | 41.2mm | 10/10 |
| March | 30.8°C | 111.6mm | 9/10 |
| April | 30.6°C | 150.7mm | 9/10 |
| May | 29.6°C | 385.3mm | 8/10 |
| June | 28.9°C | 294.4mm | 8/10 |
| July | 28.6°C | 234.1mm | 8/10 |
| August | 28.5°C | 237.3mm | 8/10 |
| September | 28.3°C | 348.7mm | 8/10 |
| October | 28.4°C | 353.7mm | 8/10 |
| November | 28.7°C | 424.8mm | 8/10 |
| December | 29.3°C | 215.0mm | 8/10 |
Full month-by-month guide: best time to visit Colombo →
For facts about Sri Lanka — currency, language and dialling code — see our Sri Lanka country guide at 247CountryInfo. Travellers also find it useful to keep a Colombo travel guide to hand. Check clothing sizes in Sri Lanka before you shop.
Frequently Asked Questions
Is September a good time to visit Colombo?
September rates 8/10 for visiting Colombo — good time to visit. Expect average highs of 28.3°C, 348.7mm of rain across the month and about 8.3 hours of daily sunshine.
What is the temperature in Colombo in September?
In September, Colombo has average highs of 28.3°C (82.9°F) and average lows of 24.7°C (76.5°F).
Does it rain in Colombo in September?
Yes — September is one of the wetter months in Colombo, averaging 348.7mm of rain over roughly 29 rainy days. Pack for heavy showers.
What should I wear in Colombo in September?
For Colombo in September (28.3°C highs / 24.7°C lows), pack light layers plus sunscreen, t-shirts and light trousers or shorts, compact travel umbrella.
More essentials for Colombo in September
Packing cubes
Keep the bag organised whatever the weather — compression cubes for every size.
Check Price →Travel first aid kit
Compact TSA-friendly kit for peace of mind wherever you travel.
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Climate data sourced from Open-Meteo (open source, open data licence). Monthly averages calculated from 2020–2023 historical data. Weather can be unpredictable — always check a live forecast before travelling.