Dehiwala-Mount Lavinia in september: average Weather, Temperature and Climate
Weather in Dehiwala-Mount Lavinia in september 2025
The weather in Dehiwala-Mount Lavinia in the month of september comes from statistical datas on the last years. You can view the weather statistics the entire month, but also navigating through the tabs for the beginning, the middle and the end of the month.
Average weather throughout september
tolerable weather UV index: 7
Weather at 6am
83°F
Moderate rain at times
56% of time
25%
9%
9%
Weather at 12pm
85°F
Moderate rain at times
52% of time
26%
15%
6%
Weather at 6pm
81°F
Moderate rain at times
49% of time
20%
19%
7%
Weather at 3am
79°F
39%
31%
19%
11%
Evolution of daily average temperature and precipitation in Dehiwala-Mount Lavinia in september
These charts show the evolution of average minimum/maximum temperatures as well as average daily precipitation volume in Dehiwala-Mount Lavinia in september.
The climate of Dehiwala-Mount Lavinia in september is tolerable
the weather in Dehiwala-Mount Lavinia in september is wet (with 18.2in of rainfall over 19 days). It should be noted an improvement from the previous month since in august it receives an average of 21.8in of precipitation over 22 days.
The climate good here september. The thermometer averaged maximum of 86°F. The minimum is 83°F. Thus, the mean temperature average on this month of september in Dehiwala-Mount Lavinia is 85°F. Note that these seasonal averages are in contrast with those observed in Dehiwala-Mount Lavinia in the month of september with a maximum record of 90°F in 2017 and a minimum record of 77°F in 2009. You can plan to have about 14 days with temperatures up to 86°F, or 47 of the month.
On average, in Dehiwala-Mount Lavinia, the days of september last 12:09. Sunrise is at 06:01 and sets at 18:10.
With a bad climate, the month of september is not the best time to go in that area.
September: another location in Sri Lanka?
If you want to go to Sri Lanka in september, there are destinations with better weather than Dehiwala-Mount Lavinia:
In september, Anuradhapura, Jaffna, Kandy, Trincomalee, Batticaloa and Dambulla have good weather.
Seasonal average climate and temperature of Dehiwala-Mount Lavinia in september
Check below seasonal norms These datas are compiled from the weather statements of the past years of the month of september.
| September | |||||
| Outside temperature | |||||
| Average temperature | 85°F | ||||
| Highest temperature | 86°F | ||||
| Lowest temperature | 83°F | ||||
| Highest record temperature | 90°F (2017) | ||||
| Lowest record temperature | 77°F (2009) | ||||
| Number of days at +86°F | 14 day(s) (47%) | ||||
| 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 | 20km/h | ||||
| Wind temperature | 83°F | ||||
| Precipitation (rainfall) | |||||
| Rainfall | 18.2in | ||||
| Number of days with rainfall | 19 day(s) (64%) | ||||
| Record daily rainfall | 3.6in (2011) | ||||
| Other climate data | |||||
| Humidity | 82% | ||||
| Visibility | 8.78km | ||||
| Cloud cover | 55% | ||||
| 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 | tolerable | ||||
How was the weather last september?
Here is the day by day recorded weather in Dehiwala-Mount Lavinia 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 Dehiwala-Mount Lavinia:
| Colombo in september | bad weather |
| Panadura in september | bad weather |
| Kalutara in september | bad weather |
| Negombo in september | tolerable weather |
| Bentota in september | bad weather |
| Adam’s peak in september | tolerable weather |
| Ambalangoda in september | bad weather |
| Kuliyapitiya in september | tolerable weather |
| Neluwa in september | tolerable weather |
| Udawalawe National Park in september | tolerable weather |
| Hatton in september | tolerable weather |
| Chilaw in september | tolerable weather |
Click over cities on the map for information about the weather in september.
Dehiwala-Mount Lavinia
perfect weather
good
tolerable
bad
very bad
Weather data for Dehiwala-Mount Lavinia in september:
Weather data for Dehiwala-Mount Lavinia for september are derived from an average of the weather forecast since 2009 in Dehiwala-Mount Lavinia. There is a margin of error and these forecasts are to be considered as general information only. The weather in Dehiwala-Mount Lavinia 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 Dehiwala-Mount Lavinia.