Colombo

Colombo District Weather in September

Average temperatures, rainfall, sunshine and the best places to visit in Colombo District, Sri Lanka in September.

Planning a getaway to Colombo District, Sri Lanka 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 to Expect in Colombo District in September

Colombo District, Sri Lanka 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 (86°F) and nighttime temperatures around 25°C (77°F) in Colombo. 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, Sri Lanka 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 (10 in) to heavy rainfall in Avissawella with 316 mm (12 in).

Average sunshine

Sunshine is moderately available across various locations. In Colombo, you can expect around 189 hours of sunlight in September, which gives a pleasant combination of sun and shade. For those who want maximum sunshine, our weather planner can point you toward the sunniest places on Earth.

Explore Colombo District by month

Pick a month to see the average temperature, rainfall and sunshine in Colombo District — and find the best time to visit. (based on Colombo)

Best Places to Visit in Colombo District in September

Click on a destination dot for more details. Toggle the map to compare temperatures or precipitation across Colombo District.

perfect weather
pleasant
tolerable
unpleasant
poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).

Popular Destinations in Colombo District

What is the weather like in September for some of the most popular destinations in Colombo District, Sri Lanka?

Temperature range in Colombo District (September)

Precipitation variation in Colombo District (September)

Colombo

In September Colombo generally has very high temperatures with maximum daytime temperatures around 30°C (86°F), minimum nighttime temperatures around 25°C (77°F) and heavy monthly rainfall. So on average the conditions are poor that month.

August
September
October
Max temperature
30°C (86°F)
30°C (86°F)
30°C (86°F)
Min temperature
26°C (79°F)
25°C (77°F)
25°C (77°F)
Monthly sun hours
202 hours
189 hours
202 hours
Monthly rainfall
211 mm (8.3 in)
262 mm (10 in)
355 mm (14 in)
Monthly rainy days
10 days
14 days
16 days
Weather conditions

Mount Lavinia

In September Mount Lavinia generally has very high temperatures with maximum daytime temperatures around 30°C (86°F), minimum nighttime temperatures around 25°C (77°F) and heavy monthly rainfall. So on average the conditions are poor that month.

August
September
October
Max temperature
30°C (86°F)
30°C (86°F)
30°C (86°F)
Min temperature
26°C (79°F)
25°C (77°F)
25°C (77°F)
Monthly sun hours
202 hours
189 hours
202 hours
Monthly rainfall
214 mm (8.4 in)
264 mm (10 in)
355 mm (14 in)
Monthly rainy days
10 days
14 days
16 days
Weather conditions

Dehiwala

In September Dehiwala generally has very high temperatures with maximum daytime temperatures around 30°C (86°F), minimum nighttime temperatures around 25°C (77°F) and heavy monthly rainfall. So on average the conditions are poor that month.

August
September
October
Max temperature
30°C (86°F)
30°C (86°F)
30°C (86°F)
Min temperature
26°C (79°F)
25°C (77°F)
25°C (77°F)
Monthly sun hours
202 hours
189 hours
202 hours
Monthly rainfall
213 mm (8.4 in)
263 mm (10 in)
355 mm (14 in)
Monthly rainy days
10 days
14 days
16 days
Weather conditions

Nugegoda

In September Nugegoda generally has very high temperatures with maximum daytime temperatures around 30°C (86°F), minimum nighttime temperatures around 25°C (77°F) and heavy monthly rainfall. So on average the conditions are poor that month.

August
September
October
Max temperature
30°C (86°F)
30°C (86°F)
30°C (86°F)
Min temperature
25°C (77°F)
25°C (77°F)
25°C (77°F)
Monthly sun hours
202 hours
189 hours
202 hours
Monthly rainfall
216 mm (8.5 in)
265 mm (10 in)
357 mm (14 in)
Monthly rainy days
10 days
14 days
16 days
Weather conditions

Boralesgamuwa

In September Boralesgamuwa generally has very high temperatures with maximum daytime temperatures around 30°C (86°F), minimum nighttime temperatures around 25°C (77°F) and heavy monthly rainfall. So on average the conditions are poor that month.

August
September
October
Max temperature
30°C (86°F)
30°C (86°F)
30°C (86°F)
Min temperature
25°C (77°F)
25°C (77°F)
25°C (77°F)
Monthly sun hours
202 hours
189 hours
202 hours
Monthly rainfall
219 mm (8.6 in)
267 mm (11 in)
359 mm (14 in)
Monthly rainy days
10 days
14 days
16 days
Weather conditions

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

Popular cities in September

Day & night temperatures, rainfall and average weather in Colombo District in September.

City Weather Day temp Night temp Rainfall
Colombo 30°C (86°F) 25°C (77°F) 262 mm (10 in)
Mount Lavinia 30°C (86°F) 25°C (77°F) 264 mm (10 in)
Dehiwala 30°C (86°F) 25°C (77°F) 263 mm (10 in)
Nugegoda 30°C (86°F) 25°C (77°F) 265 mm (10 in)
Boralesgamuwa 30°C (86°F) 25°C (77°F) 267 mm (11 in)
Sri Jayewardenepura Kotte 30°C (86°F) 25°C (77°F) 265 mm (10 in)

Colombo District weather in September: frequently asked questions

What is the weather like in Colombo District, Sri Lanka in September?

Colombo District, Sri Lanka typically experiences poor weather in September, part of the season. Daytime highs in Colombo average around 30°C (86°F), and temperatures drop to about 25°C (77°F) at night.

What is the average temperature in Colombo District, Sri Lanka in September?

Daytime temperatures in Colombo peak at roughly 30°C (86°F) in September, dropping to about 25°C (77°F) overnight.

Does Colombo District, Sri Lanka get a lot of rain in September?

Expect plenty of rainfall. Colombo records an average of 262 mm (10 in) in September, putting it among the wetter months for Colombo District, Sri Lanka.

Is September a Good Time to Visit Colombo District, Sri Lanka?

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

On average, the best time to visit Colombo District, Sri Lanka is in January with generally tolerable weather in Colombo. On the other hand, the weather in April, May, June, July, August, September, October, November and December 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.

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