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

Heavy rain

22%

Partly Cloudy

10%

Cloudy

8%

Weather at 12pm
86°F

Heavy rain

27%

Clear/Sunny

17%

Partly Cloudy

5%

Weather at 6pm
81°F

Partly Cloudy

18%

Heavy rain

18%

Cloudy

9%

Weather at 3am
79°F

Moderate rain at times

49%

Heavy rain

32%

Cloudy

14%

Partly Cloudy

5%

More information about the weather in Colombo in september



Where to go in Sri Lanka in september?

Where to go in Sri Lanka in september: destination map

Sri Lanka: weather map in september in different regions
Sri Lanka: weather map in september in different regions ©whereandwhen.net

Download the map

Where to go in each region in september?

Central-South of Sri Lanka
(Kandy, Dambulla, Nuwara Eliya...)
83°F to 94°F6 à 19 days
tolerable weather*
East Coast of Sri Lanka
(Trincomalee, Batticaloa, Pottuvil...)
88°F to 94°F6 à 11 days85°F to 86°F
good weather
North of Sri Lanka
(Jaffna, Mullaitivu, Vavuniya...)
85°F to 92°F6 à 12 days85°F to 86°F
good weather
North Central of Sri Lanka
(Anuradhapura, Wilpattu National Park, Polonnaruwa...)
92°F to 94°F6 à 7 days
good weather
North West of Sri Lanka
(Puttalam, Kurunegala, Chilaw...)
86°F to 90°F7 à 17 days83°F
good weather*
Southern Coast of Sri Lanka
(Galle, Tangalle, Yala National Park...)
85°F to 88°F6 à 20 days83°F to 85°F
good weather*
West Coast of Sri Lanka
(Colombo, Negombo, Kalutara...)
86°F17 à 20 days83°F
bad weather*
*over most of the region. Weather may vary locally.


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
more information about the climate in Colombo in september

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
more information about the climate in Anuradhapura in september

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
more information about the climate in Galle in september

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
more information about the climate in Jaffna in september

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
more information about the climate in Kandy in september


All cities in Sri Lanka in september

Colombo in septemberbad weather
Anuradhapura in septembergood weather
Galle in septemberbad weather
Jaffna in septembergood weather
Kandy in septembergood weather
Trincomalee in septembergood weather
Batticaloa in septembergood weather
Chilaw in septembertolerable weather
Dambulla in septembergood weather
Kalutara in septemberbad weather
Kurunegala in septembergood weather
Mullaitivu in septembergood weather
Negombo in septembertolerable weather
Nuwara Eliya in septembertolerable weather
Wilpattu National Park in septembergood weather
Yala National Park in septembergood weather
Polonnaruwa in septembergood weather
Pottuvil in septembergood weather
Puttalam in septembergood weather
Tangalle in septembergood weather
Vavuniya in septembergood weather
See full list of cities (60)


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.


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