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Katunayaka Weather in May
Thinking of visiting Katunayaka in May? Expect very high temperatures reaching 31°C (88°F) during the day, dropping to 26°C (79°F) at night. Heavy showers are common during the rainy season.
Rainfall in Katunayaka in May
As part of the rainy season, Katunayaka sees around 12 days of rain in May, with an average of 268 mm (11 in). Rainy season showers here are typically intense, often clearing quickly but coming down hard while they last.
Temperature in Katunayaka in May
May in Katunayaka brings typical temperatures with highs around 31°C (88°F) and lows of 26°C (79°F). The hottest part of the day is usually in the afternoon, so lighter clothing can help you stay comfortable. Nights are warm at 26°C (79°F), which can make sleeping uncomfortable. Keeping windows open or using a fan can help. A cold shower before bed is also a good way to cool down.
Sunshine in Katunayaka in May
Enjoy a sunny month with about 202 hours of sunshine, even though this month falls in the wet season. There is still enough sun to enjoy the outdoors.May in Katunayaka can still be great, but if you prefer pleasant temperatures along with dry and sunny conditions, our weather planner can help you explore other options in the world.
Katunayaka Temperature in May
Min Temperature
26°C (79°F)
Max Temperature
31°C (88°F)
Chance of Rain
41%
Precipitation
268 mm (11 in)
Rainy days
12 days
Humidity
77% *
Sunshine
202 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
44-year average (1976-2025)
Based on our historical records, temperatures in Katunayaka typically stay consistent throughout May, with daily highs averaging around 31°C (88°F). Nights are warm, with lows around 26°C (79°F).
Average temperatures in May
Daily Historical Precipitation
44-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in May
Historical weather records for Katunayaka in May
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 May
Based on 31 years of weather observations (1995-2026), these are the most extreme conditions recorded in Katunayaka.
- The hottest May day on record in Katunayaka reached 37°C (99°F) (May 30, 1996).
- The coldest May day was on May 7, 1997, with a maximum of 25°C (77°F).
- Katunayaka registered its coldest May night on May 13, 2003, with temperatures dropping to 20°C (68°F).
Best Places in Sri Lanka in May
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 May →
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 May
Warm but pleasant conditions in Katunayaka in May. Focus on lightweight, maybe with natural fabrics, cotton blend shirts, comfortable shorts, and breathable footwear. A light cover-up for sun protection is smart too. It's going to pour! Pack a good poncho and prepare for very wet conditions. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.
What To Do in Katunayaka in May
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Swimming8/10 -
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 May
Where to go in May - average daytime high across popular destinations.
Colombo
31°C (88°F) Negombo31°C (88°F) Mirissa30°C (86°F) Hikkaduwa30°C (86°F) Unawatuna30°C (86°F) Galle30°C (86°F) Kandy
30°C (86°F) Nuwara Eliya29°C (84°F) Bucket list
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