Gampaha District Weather in September

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

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Negombo Katunayaka Ja-Ela Seeduwa

Are you planning a trip a to Gampaha District, Sri Lanka in September and wondering what kind of weather to expect? This page has all the details you need.

What to Expect in Gampaha District in September

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

Temperatures

You can expect warm maximum daytime temperatures of around 30°C (86°F) and nighttime temperatures around 26°C (79°F) in Negombo. The temperatures mentioned for daytime and nighttime are general averages. However there can be days that surpass these temperatures. So equip yourself with clothing that can handle the potential heat.

To explore the conditions in Gampaha District, Sri Lanka in more detail, check the map below.

Precipitation

In September, precipitation varies across different areas. From heavy rainfall in Negombo with an average of 245 mm (9.6 in) to heavy rainfall in Kapugoda with 292 mm (11 in).

Average sunshine

Most areas see decent amounts of sunshine this month. Negombo gets around 189 hours of sunlight, providing a pleasant balance of sun and clouds. If you'd prefer more guaranteed sunshine, our weather planner can show you sunnier spots around the world.

Explore Gampaha District by month

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

January31°C (88°F) February32°C (90°F) March33°C (91°F) April32°C (90°F) May31°C (88°F) June30°C (86°F) This monthJuly30°C (86°F) August30°C (86°F) September30°C (86°F) October30°C (86°F) November30°C (86°F) December31°C (88°F)
Best Time to Visit Gampaha District →

Best Places to Visit in Gampaha District in September

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

Conditions Temperatures Precipitation
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 Gampaha District

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

Temperature range in Gampaha District (September)

Precipitation variation in Gampaha District (September)

Negombo

In September Negombo generally has high temperatures with maximum daytime temperatures around 30°C (86°F), minimum nighttime temperatures around 26°C (79°F) and heavy monthly rainfall. So on average the conditions are poor that month.

« August
September
October »
August
September
October
Max temperature
30°C (86°F)
30°C (86°F)
30°C (86°F)
Min temperature
26°C (79°F)
26°C (79°F)
25°C (77°F)
Monthly sun hours
202 hours
189 hours
202 hours
Monthly rainfall
195 mm (7.7 in)
245 mm (9.6 in)
338 mm (13 in)
Monthly rainy days
8 days
12 days
15 days
Weather conditions
unpleasant
poor
poor
Climate in Negombo →

Katunayaka

In September Katunayaka 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 »
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
203 mm (8 in)
250 mm (9.8 in)
345 mm (14 in)
Monthly rainy days
9 days
12 days
15 days
Weather conditions
poor
poor
poor
Climate in Katunayaka →

Ja-Ela

In September Ja-Ela 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 »
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
210 mm (8.3 in)
256 mm (10 in)
352 mm (14 in)
Monthly rainy days
9 days
13 days
16 days
Weather conditions
poor
poor
poor
Climate in Ja-Ela →

Seeduwa

In September Seeduwa 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 »
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
205 mm (8.1 in)
252 mm (9.9 in)
347 mm (14 in)
Monthly rainy days
9 days
12 days
15 days
Weather conditions
poor
poor
poor
Climate in Seeduwa →

Gampaha

In September Gampaha generally has very high temperatures with maximum daytime temperatures around 31°C (88°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 »
August
September
October
Max temperature
31°C (88°F)
31°C (88°F)
31°C (88°F)
Min temperature
25°C (77°F)
25°C (77°F)
24°C (75°F)
Monthly sun hours
202 hours
189 hours
202 hours
Monthly rainfall
228 mm (9 in)
263 mm (10 in)
363 mm (14 in)
Monthly rainy days
10 days
13 days
16 days
Weather conditions
poor
poor
poor
Climate in Gampaha →

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

Popular cities in September

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

City Weather Day temp Night temp Rainfall
Negombo 30°C (86°F) 26°C (79°F) 245 mm (9.6 in)
Katunayaka 30°C (86°F) 25°C (77°F) 250 mm (9.8 in)
Ja-Ela 30°C (86°F) 25°C (77°F) 256 mm (10 in)
Seeduwa 30°C (86°F) 25°C (77°F) 252 mm (9.9 in)
Gampaha 31°C (88°F) 25°C (77°F) 263 mm (10 in)
Uswetakeiyawa 30°C (86°F) 25°C (77°F) 256 mm (10 in)

Gampaha District weather in September: frequently asked questions

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

Gampaha District, Sri Lanka typically experiences poor weather in September, part of the season. Daytime highs in Negombo average around 30°C (86°F), and temperatures drop to about 26°C (79°F) at night.

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

Daytime temperatures in Negombo peak at roughly 30°C (86°F) in September, dropping to about 26°C (79°F) overnight.

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

Rainfall in Gampaha District, Sri Lanka peaks during September. Negombo averages roughly 245 mm (9.6 in), so frequent and sometimes heavy showers are the norm.

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

In our view, September might not be the best time to travel to Gampaha District, Sri Lanka with often poor weather in Negombo.

On average, the best time to visit Gampaha District, Sri Lanka is in January and February with generally tolerable weather in Negombo. 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 Gampaha 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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