Sri Lanka in september: average Weather, Temperature and Climate, Where to go?
Weather in Sri Lanka in september 2025
Below, check out the weather forecast for the month of september for most popular cities in Sri Lanka. These datas are statistics for the month of september from weather reports for over 10 years. The percentage indicates the possibility of having the weather indicated.
Average weather in september in Colombo
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%
Where to go in Sri Lanka in september?
Where to go in Sri Lanka in september: destination map
Where to go in each region in september?
| Central-South of Sri Lanka (Kandy, Dambulla, Nuwara Eliya...) | 83°F to 94°F | 6 à 19 days | tolerable weather* | |
| East Coast of Sri Lanka (Trincomalee, Batticaloa, Pottuvil...) | 88°F to 94°F | 6 à 11 days | 85°F to 86°F | good weather |
| North of Sri Lanka (Jaffna, Mullaitivu, Vavuniya...) | 85°F to 92°F | 6 à 12 days | 85°F to 86°F | good weather |
| North Central of Sri Lanka (Anuradhapura, Wilpattu National Park, Polonnaruwa...) | 92°F to 94°F | 6 à 7 days | good weather | |
| North West of Sri Lanka (Puttalam, Kurunegala, Chilaw...) | 86°F to 90°F | 7 à 17 days | 83°F | good weather* |
| Southern Coast of Sri Lanka (Galle, Tangalle, Yala National Park...) | 85°F to 88°F | 6 à 20 days | 83°F to 85°F | good weather* |
| West Coast of Sri Lanka (Colombo, Negombo, Kalutara...) | 86°F | 17 à 20 days | 83°F | bad weather* |
Where should you go in Sri Lanka in september when it comes to the weather?
Remember:
The climate in Sri Lanka in september ranges from good to bad depending on the region and city.
The climate throughout September in Sri Lanka is deteriorating throughout the country. Temperatures are rising again while rainfall is still intense. However, the weather in the Sri Lankan localities provide the opportunity to enjoy the sunshine and the cloud thinnings between showers.
Sptember in Colombo and the West Coast of the Island
It is hot in Colombo and its surroundings, especially in the middle of the day. Yet because of the rain that continues to fall at any time of day and night, the weather is barely favorable.
September in Jaffna and the Extreme North of the Island
The weather in Sri Lanka throughout September is more favorable in the north, as in the locality of Jaffna. The first weeks of September are pleasant and sunny. Towards the end of the month, the mornings are wetter.
September in Trincomalee and the Northeast of the Island
It is hot again in the northeast of the island of Ceylon, especially since the rains are relatively weak. Midday is particularly hot. Thanks to the sea breeze that tempers the heat, the atmosphere is still pleasant.
September in Nuwara Eliya and the Central Plain
The warmth is comfortable in Nuwara Eliya and its surroundings, yet with 26 days of intermittent showers in the day and intense rain in the evening, the September weather in Sri Lanka in the central plain, is just acceptable.
Climate in Sri Lanka in september
Climate in Colombo in september
In september, maximum temperature is 86°F and minimum temperature is 83°F (for an average temperature of 85°F). The climate is burning in that locality in this month. With 18.6in over 20 days, you will suffer the rain for your holidays. Remember to pack Rain coats.
With a bad weather, september is not the best time to go in this locality.
| September | |||
| Average temperature | 85°F | ||
| Highest temperature | 86°F | ||
| Lowest temperature | 83°F | ||
| Sea temperature | 82°F | ||
| Rainfall | 18.6in | ||
| Number of days with rainfall | 20 day(s) (67%) | ||
| Humidity | 82% | ||
| Daily sunshine hours | 11 | ||
| Cloud cover | 56% | ||
| Length of day | 12:09 | ||
| Our opinion at whereandwhen.net | bad |
Climate in Anuradhapura in september
In september, maximum temperature is 92°F and minimum temperature is 83°F (for an average temperature of 88°F). The climate is very warm there in the month of september. With 5.2in over 7 days, rainfall can happen for your trip. But this is rather reasonably and it will not be continuous.
With a good weather, september is an advisable month to go there.
| September | |||
| Average temperature | 88°F | ||
| Highest temperature | 92°F | ||
| Lowest temperature | 83°F | ||
| Rainfall | 5.2in | ||
| Number of days with rainfall | 7 day(s) (23%) | ||
| Humidity | 72% | ||
| Daily sunshine hours | 12 | ||
| Cloud cover | 46% | ||
| Length of day | 12:09 | ||
| Our opinion at whereandwhen.net | good |
Climate in Galle in september
In september, maximum temperature is 85°F and minimum temperature is 81°F (for an average temperature of 83°F). The climate is very warm in this city in september. With 19.4in over 20 days, you may find yourself often in the rain for your stay. Remember to bring adapted clothes.
| September | |||
| Average temperature | 83°F | ||
| Highest temperature | 85°F | ||
| Lowest temperature | 81°F | ||
| Sea temperature | 83°F | ||
| Rainfall | 19.4in | ||
| Number of days with rainfall | 20 day(s) (67%) | ||
| Humidity | 82% | ||
| Daily sunshine hours | 12 | ||
| Cloud cover | 51% | ||
| Length of day | 12:09 | ||
| Our opinion at whereandwhen.net | bad |
Climate in Jaffna in september
In september, maximum temperature is 85°F and minimum temperature is 83°F (for an average temperature of 85°F). The climate is very hot in this location in september. With 6.3in over 9 days, you risk getting wet slightly during your trip. But this is rather moderate and it will not be continuous.
With a correct climate, the month of september is okay (but not the best time) for traveling in this city in Sri Lanka.
| September | |||
| Average temperature | 85°F | ||
| Highest temperature | 85°F | ||
| Lowest temperature | 83°F | ||
| Sea temperature | 85°F | ||
| Rainfall | 6.3in | ||
| Number of days with rainfall | 9 day(s) (28%) | ||
| Humidity | 80% | ||
| Daily sunshine hours | 12 | ||
| Cloud cover | 32% | ||
| Length of day | 12:10 | ||
| Our opinion at whereandwhen.net | good |
Climate in Kandy in september
In the month of september, the mean temperature in Kandy is 83°F (maximum temperature is 86°F and minimum temperature is 77°F). The climate is very warm in this city in this month. With 9.2in over 12 days, rain may occur for your stay. But this is rather moderate and it is only of temporary showers.
With proper weather, the month of september is okay (but not the best month) for traveling in this locality in Sri Lanka.
| September | |||
| Average temperature | 83°F | ||
| Highest temperature | 86°F | ||
| Lowest temperature | 77°F | ||
| Rainfall | 9.2in | ||
| Number of days with rainfall | 12 day(s) (40%) | ||
| Humidity | 77% | ||
| Daily sunshine hours | 12 | ||
| Cloud cover | 35% | ||
| Length of day | 12:09 | ||
| Our opinion at whereandwhen.net | good |
All cities in Sri Lanka in september
| Colombo in september | bad weather |
| Anuradhapura in september | good weather |
| Galle in september | bad weather |
| Jaffna in september | good weather |
| Kandy in september | good weather |
| Trincomalee in september | good weather |
| Batticaloa in september | good weather |
| Chilaw in september | tolerable weather |
| Dambulla in september | good weather |
| Kalutara in september | bad weather |
| Kurunegala in september | good weather |
| Mullaitivu in september | good weather |
| Negombo in september | tolerable weather |
| Nuwara Eliya in september | tolerable weather |
| Wilpattu National Park in september | good weather |
| Yala National Park in september | good weather |
| Polonnaruwa in september | good weather |
| Pottuvil in september | good weather |
| Puttalam in september | good weather |
| Tangalle in september | good weather |
| Vavuniya in september | good weather |
Weather data for Sri Lanka in september:
Weather data for Sri Lanka in september is derived from an average of the weather forecast since 2009 in Sri Lanka. There is a margin of error and these forecasts are to be considered as general information only. The weather in Sri Lanka can vary slightly from year to year, but these predictions should limit surprises. So you can pack your bags and check when is the best time to go to Sri Lanka.