Colombo in september: average Weather, Temperature and Climate
Weather in Colombo in september 2025
The weather in Colombo in the month of september comes from statistical datas on the past years. You can view the weather statistics for the whole month, but also navigating through the tabs for the beginning, the middle and the end of the month.
Average weather throughout september
bad weather UV index: 7
Weather at 6am
83°F
Moderate rain at times
59% of time
22%
10%
8%
Weather at 12pm
86°F
Moderate rain at times
51% of time
27%
17%
5%
Weather at 6pm
81°F
Moderate rain at times
49% of time
18%
18%
9%
Weather at 3am
79°F
49%
32%
14%
5%
Evolution of daily average temperature and precipitation in Colombo in september
These charts show the evolution of average minimum/maximum temperatures as well as average daily precipitation volume in Colombo in september.
The climate of Colombo in september is bad
The weather in september in Colombo is wet (with 18.6in of rainfall over 20 days). It should be noted an improvement from the previous month since in august it receives an average of 23.9in of rainfall over 23 days.
The climate pleasant in that locality this month. The thermometer averaged maximum of 86°F. The seasonal minimum is 83°F. Thus, the mean temperature average on this month of september in Colombo is 85°F. Note that seasonal normals in contrast with those observed in Colombo in september with a maximum record of 92°F in 2019 and a minimum record of 76°F in 2009. You can expect to have about 15 days with temperatures over 86°F, or 50 of time.
Day length in Colombo in september is 12:09. The sun rises at 06:01 and sunset is at 18:10.
With a bad weather, the month of september is not recommended to go there.
September: another location in Sri Lanka?
If you want to go to Sri Lanka in september, there are destinations with better weather than Colombo:
In september, Anuradhapura, Jaffna, Kandy, Trincomalee, Batticaloa and Dambulla have good weather.
Finally, Chilaw, Negombo, Nuwara Eliya, Adam’s peak, Ella and Haputale have a tolerable climate, but better than Colombo.
Seasonal average climate and temperature of Colombo in september
Check below seasonal norms These statistics are compiled from the weather statements earlier years of the month of september.
| September | |||||
| Outside temperature | |||||
| Average temperature | 85°F | ||||
| Highest temperature | 86°F | ||||
| Lowest temperature | 83°F | ||||
| Highest record temperature | 92°F (2019) | ||||
| Lowest record temperature | 76°F (2009) | ||||
| Number of days at +86°F | 15 day(s) (50%) | ||||
| Number of days at +65°F | 30 day(s) (100%) | ||||
| Sea temperature | |||||
| Average sea temperature | 82°F | ||||
| Lowest sea temperature | 80°F | ||||
| Highest sea temperature | 84°F | ||||
| Wind | |||||
| Wind speed | 19km/h | ||||
| Wind temperature | 83°F | ||||
| Precipitation (rainfall) | |||||
| Rainfall | 18.6in | ||||
| Number of days with rainfall | 20 day(s) (67%) | ||||
| Record daily rainfall | 3.7in (2011) | ||||
| Other climate data | |||||
| Humidity | 82% | ||||
| Visibility | 8.74km | ||||
| Cloud cover | 56% | ||||
| UV index | 7 | ||||
| Daily sunshine hours | 11 | ||||
| Sunrise and sunset | |||||
| Time of sunrise | 06:01 | ||||
| Time of sunset | 18:10 | ||||
| Length of day | 12:09 | ||||
| Our opinion about the weather in september | |||||
| Our opinion at whereandwhen.net | bad | ||||
How was the weather last september?
Here is the day by day recorded weather in Colombo in september 2024:
79°F to 83°F
81°F to 85°F
79°F to 81°F
79°F to 85°F
81°F to 85°F
81°F to 85°F
79°F to 85°F
79°F to 83°F
79°F to 85°F
79°F to 85°F
79°F to 83°F
81°F to 85°F
81°F to 86°F
81°F to 85°F
81°F to 85°F
81°F to 85°F
81°F to 85°F
79°F to 85°F
81°F to 85°F
79°F to 85°F
79°F to 85°F
79°F to 85°F
81°F to 83°F
81°F to 83°F
81°F to 85°F
79°F to 85°F
79°F to 85°F
79°F to 85°F
79°F to 86°F
79°F to 83°F
Map: other cities in Sri Lanka in september
Cities near Colombo:
| Dehiwala-Mount Lavinia in september | tolerable weather |
| Panadura in september | bad weather |
| Negombo in september | tolerable weather |
| Kalutara in september | bad weather |
| Bentota in september | bad weather |
| Kuliyapitiya in september | tolerable weather |
| Chilaw in september | tolerable weather |
| Adam’s peak in september | tolerable weather |
| Ambalangoda in september | bad weather |
| Hatton in september | tolerable weather |
| Neluwa in september | tolerable weather |
| Gampola in september | good weather |
Click over cities on the map for information about the weather in september.
Colombo
perfect weather
good
tolerable
bad
very bad
Weather data for Colombo in september:
Weather data for Colombo for september are derived from an average of the weather forecast since 2009 in Colombo. There is a margin of error and these forecasts are to be considered as general information only. The weather in Colombo can vary slightly from year to year, but this data should limit surprises. So you can pack your bags or check for the best time in year to go to Colombo.