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Weather in September in Colombo District

Planning a getaway to Colombo District this September and curious about the weather you should prepare for? Discover all the vital details you need on this page, solving your puzzle:

What is the weather like in Colombo District in September?

Colombo District is a region in Sri Lanka. September in Colombo District generally has very warm temperatures, with heavy precipitation.

Temperatures

You can expect very warm maximum daytime temperatures of around 30°C and nighttime temperatures around 25°C in Colombo. To learn more about the conditions in specific areas of Colombo District in September, check out the map below. These night and day temperatures are average and some days may be even warmer. So be prepared and dress for the heat.

To explore the conditions in Colombo District in more detail, check the map below.

Precipitation

In September, precipitation varies across different areas. From heavy rainfall in Colombo with an average of 262 mm to heavy rainfall in Athurugiriya with 274 mm.

Average sunshine

Most areas experience a moderate amount of sunshine, with approximately 189 hours of sunlight expected in Colombo. This makes it neither too gloomy nor overly bright.

For more details on the yearly climate, visit our Colombo District climate page.

Where to go in Colombo District in September

Find more information for the most popular destinations in the Colombo District on the map below. Click on a destination dot for more details.

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Legend perfect weather pleasant tolerable unpleasant poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C and 29°C and not too much precipitation (less than 90 mm a month).

Select a Month of Interest

Check the conditions for any month of the year.

For a detailed overview over the year and the best time to visit Sri Lanka, check out our Colombo District's climate page.

Popular destinations

What is the weather like in September for the 5 most popular destinations in Colombo District?

Colombo

In September Colombo generally has very high temperatures with maximum daytime temperatures around 30°C, minimum nighttime temperatures around 25°C and heavy monthly rainfall. So on average the conditions are poor that month.

Colombo
minimum temparatureMax temperature minimum temparatureMax temp
maximum temparatureMin temperature maximum temparatureMin temp
sun hoursMonthly sun hours sun hoursSun hours
precipitationMonthly rainfall precipitationRainfall
rain daysMonthly rainy days rain daysRainy days
conditionsWeather conditions conditionsWeather
<<   August August
<<  
30°C 
26°C 
202 hours 
211 mm 
10 days 
poor 
30°C 
25°C 
189 hours 
262 mm 
14 days 
poor 
October   >> October
>>  
30°C 
25°C 
202 hours 
355 mm 
16 days 
poor 
Climate in Colombo

Mount Lavinia

In September Mount Lavinia generally has very high temperatures with maximum daytime temperatures around 30°C, minimum nighttime temperatures around 25°C and heavy monthly rainfall. So on average the conditions are poor that month.

Mount Lavinia
minimum temparatureMax temperature minimum temparatureMax temp
maximum temparatureMin temperature maximum temparatureMin temp
sun hoursMonthly sun hours sun hoursSun hours
precipitationMonthly rainfall precipitationRainfall
rain daysMonthly rainy days rain daysRainy days
conditionsWeather conditions conditionsWeather
<<   August August
<<  
30°C 
26°C 
202 hours 
214 mm 
10 days 
poor 
30°C 
25°C 
189 hours 
264 mm 
14 days 
poor 
October   >> October
>>  
30°C 
25°C 
202 hours 
355 mm 
16 days 
poor 
Climate in Mount Lavinia

Dehiwala

In September Dehiwala generally has very high temperatures with maximum daytime temperatures around 30°C, minimum nighttime temperatures around 25°C and heavy monthly rainfall. So on average the conditions are poor that month.

Dehiwala
minimum temparatureMax temperature minimum temparatureMax temp
maximum temparatureMin temperature maximum temparatureMin temp
sun hoursMonthly sun hours sun hoursSun hours
precipitationMonthly rainfall precipitationRainfall
rain daysMonthly rainy days rain daysRainy days
conditionsWeather conditions conditionsWeather
<<   August August
<<  
30°C 
26°C 
202 hours 
213 mm 
10 days 
poor 
30°C 
25°C 
189 hours 
263 mm 
14 days 
poor 
October   >> October
>>  
30°C 
25°C 
202 hours 
355 mm 
16 days 
poor 
Climate in Dehiwala

Nugegoda

In September Nugegoda generally has very high temperatures with maximum daytime temperatures around 30°C, minimum nighttime temperatures around 25°C and heavy monthly rainfall. So on average the conditions are poor that month.

Nugegoda
minimum temparatureMax temperature minimum temparatureMax temp
maximum temparatureMin temperature maximum temparatureMin temp
sun hoursMonthly sun hours sun hoursSun hours
precipitationMonthly rainfall precipitationRainfall
rain daysMonthly rainy days rain daysRainy days
conditionsWeather conditions conditionsWeather
<<   August August
<<  
30°C 
25°C 
202 hours 
216 mm 
10 days 
poor 
30°C 
25°C 
189 hours 
265 mm 
14 days 
poor 
October   >> October
>>  
30°C 
25°C 
202 hours 
357 mm 
16 days 
poor 
Climate in Nugegoda

Boralesgamuwa

In September Boralesgamuwa generally has very high temperatures with maximum daytime temperatures around 30°C, minimum nighttime temperatures around 25°C and heavy monthly rainfall. So on average the conditions are poor that month.

Boralesgamuwa
minimum temparatureMax temperature minimum temparatureMax temp
maximum temparatureMin temperature maximum temparatureMin temp
sun hoursMonthly sun hours sun hoursSun hours
precipitationMonthly rainfall precipitationRainfall
rain daysMonthly rainy days rain daysRainy days
conditionsWeather conditions conditionsWeather
<<   August August
<<  
30°C 
25°C 
202 hours 
219 mm 
10 days 
poor 
30°C 
25°C 
189 hours 
267 mm 
14 days 
poor 
October   >> October
>>  
30°C 
25°C 
202 hours 
359 mm 
16 days 
poor 
Climate in Boralesgamuwa

Is your destination not in the list? Have a look at other destinations in Colombo District, in Sri Lanka.

Is September the best time to visit Colombo District?

In our opinion, September may not be the ideal time to visit Colombo District due to the typically poor weather in Colombo.

On average, the best time to visit Colombo District is in January, February and March with generally pleasant weather in Colombo. On the other hand, the weather in April, May, June, July, August, September, October and November tend to be poor.

Interested in more climate information?

We have much more information about the climate in Colombo District.

Weather and climate has detailed information for every country in the world. Are you going to Sri Lanka? Get detailed historical weather averages for many cities in Sri Lanka.

Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal travel conditions. Find out where to go with our weather planner.