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Katunayaka Weather in September
September in Katunayaka brings very high temperatures around 30°C (86°F) during the day, dropping to 25°C (77°F) at night, and as part of the rainy season, heavy rainfall is common.
Rainfall in Katunayaka in September
Katunayaka is in the rainy season in September, with rain on around 12 days and an average of 250 mm (9.8 in). Rainy season showers here are typically intense, often clearing quickly but coming down hard while they last.
Temperature in Katunayaka in September
In September, Katunayaka sees very high temperatures, with highs of 30°C (86°F). Nights drop to around 25°C (77°F). Indoor breaks or shaded spots can make the warmer part of the day much more comfortable. With lows around 25°C (77°F), the nights are warm enough that a sheet is usually all you need for bedding.
Sunshine in Katunayaka in September
With about 189 hours of sunshine, the area enjoys a nice balance of sun and rainy moments, creating a pleasant environment.If you're looking for dry conditions and comfortable temperatures, September may not be the ideal month to visit Katunayaka. Our weather planner can help you explore destinations with more pleasant weather conditions.
Katunayaka Temperature in September
Min Temperature
25°C (77°F)
Max Temperature
30°C (86°F)
Chance of Rain
40%
Precipitation
250 mm (9.8 in)
Rainy days
12 days
Humidity
76% *
Sunshine
189 hours *
Percentage Sunshine
*
* Data from: Colombo, Sri Lanka (29 KM, 18 Miles).
Katunayaka Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Katunayaka - and find the best time to visit.
Daily Historical Temperatures
46-year average (1976-2025)
Based on our historical records, temperatures in Katunayaka typically stay consistent throughout September, with daily highs averaging around 30°C (86°F). Nights are warm, with lows around 26°C (79°F).
Average temperatures in September
Daily Historical Precipitation
46-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in September
Historical weather records for Katunayaka in September
Browse day-by-day weather records for Katunayaka spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Katunayaka historical weather extremes in September
According to our 28 years of weather records for Katunayaka, the following extremes were recorded between 1998 and 2026.
- Katunayaka recorded its highest September temperature of 34°C (93°F) on September 18, 2019.
- On September 24, 2000, Katunayaka saw its coldest September day with temperatures maxing out at 25°C (77°F).
- The lowest overnight temperature recorded in September was 22°C (72°F) (September 9, 2007).
Best Places in Sri Lanka in September
Find out more about the weather in Sri Lanka and which places have the best travel conditions in this month. See all of Sri Lanka in September →
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).
What to Wear in Katunayaka in September
Warm temperatures in September make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. Heavy rain is guaranteed, please bring a good poncho and waterproof everything! Bring sunglasses since you'll have some sunny periods throughout the month
What To Do in Katunayaka in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Swimming7/10 -
Cycling7/10 -
Walking7/10 -
Camping7/10 -
Outdoor sports7/10
Katunayaka 3-Day Forecast
More climate data for Katunayaka
Temperature Rainfall Sunshine Humidity
See the full Katunayaka climate overview or explore weather in Sri Lanka.
Popular in September
Where to go in September - average daytime high across popular destinations.
Colombo
30°C (86°F) Galle29°C (84°F) Mirissa29°C (84°F) Hikkaduwa29°C (84°F) Negombo30°C (86°F) Kandy
29°C (84°F) Unawatuna29°C (84°F) Nuwara Eliya28°C (82°F) Bucket list
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