Dambulla Weather in May

NASA POWER reanalysis for the half-degree grid cell around Dambulla, 1991-2020; a grid cell is an area average and can differ from a thermometer in town by several degrees

Average highs run from 33°C on May 1 to 31°C on May 31, and lows from 25°C to 25°C. Normal precipitation for the month is 105 mm over about 12 wet days.

May day by day

The normal high and low for each date, in °C.

Normal low
Normal high
Reanalysis extreme high
Reanalysis extreme low

May at a glance

Average high: 32°C
Average low: 25°C
Precipitation: 105 mm
Reanalysis high: 40°CMay 21, 1996
Reanalysis low: 22°CMay 4, 2012
Daylight: 12 h 24 min to 12 h 33 min
Cloud cover: 66%
Humidity: 80%
Dew point: 24°C
Wind: 18.0 km/h

Every day of the month

A wet day has at least 1 mm of precipitation in the reanalysis.

Date	Normal high	Normal low	Reanalysis high	Reanalysis low	Chance wet
May 1	33°C	25°C	37°C 1991	23°C 2015	60%
May 2	33°C	25°C	37°C 2020	23°C 2012	59%
May 3	33°C	25°C	38°C 1991	23°C 2012	57%
May 4	33°C	25°C	38°C 1991	22°C 2012	54%
May 5	33°C	25°C	37°C 1998	24°C 2012	53%
May 6	33°C	25°C	39°C 1998	24°C 2006	52%
May 7	33°C	25°C	39°C 1998	24°C 2008	52%
May 8	33°C	25°C	38°C 1991	23°C 1994	51%
May 9	32°C	25°C	38°C 2000	23°C 1994	50%
May 10	32°C	25°C	38°C 1993	23°C 2010	49%
May 11	32°C	25°C	38°C 1996	23°C 2011	48%
May 12	32°C	25°C	39°C 1996	23°C 1992	46%
May 13	32°C	25°C	37°C 1996	23°C 2011	45%
May 14	32°C	25°C	38°C 1996	23°C 2011	44%
May 15	32°C	25°C	38°C 1996	23°C 2011	42%
May 16	32°C	25°C	39°C 1996	23°C 2011	40%
May 17	32°C	25°C	38°C 1996	23°C 1993	39%
May 18	32°C	25°C	38°C 1996	23°C 2018	39%
May 19	32°C	25°C	37°C 1996	23°C 2011	40%
May 20	32°C	25°C	39°C 1996	24°C 2011	39%
May 21	32°C	25°C	40°C 1996	24°C 2011	38%
May 22	32°C	25°C	39°C 1996	23°C 1995	38%
May 23	32°C	25°C	38°C 1996	24°C 1993	38%
May 24	32°C	25°C	37°C 1996	24°C 2008	38%
May 25	32°C	25°C	35°C 1996	24°C 2008	38%
May 26	32°C	25°C	37°C 2019	24°C 2018	38%
May 27	32°C	25°C	38°C 2019	24°C 1999	39%
May 28	32°C	25°C	37°C 2019	24°C 1999	39%
May 29	32°C	25°C	36°C 2019	23°C 2016	38%
May 30	31°C	25°C	36°C 2019	24°C 1999	40%
May 31	31°C	25°C	35°C 1997	24°C 1995	41%

Chance of rain

Chance of a wet day

Sunrise and sunset

Times for 2026, local time (GMT+5:30).

May 1: sunrise 5:53 AM, sunset 6:17 PM
May 31: sunrise 5:49 AM, sunset 6:22 PM

Every day of May: sun and moon

Other months

Sources

Cloud, humidity, wind and sunshine, and temperature and precipitation: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.