Devinuwara Weather in May

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

Average highs run from 30°C on May 1 to 29°C on May 31, and lows from 27°C to 27°C. Normal precipitation for the month is 161 mm over about 22 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: 29°C
Average low: 27°C
Precipitation: 161 mm
Reanalysis high: 33°CMay 7, 1998
Reanalysis low: 25°CMay 22, 1995
Daylight: 12 h 20 min to 12 h 27 min
Cloud cover: 79%
Humidity: 83%
Dew point: 25°C
Wind: 21.2 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	30°C	27°C	32°C 1998	26°C 1999	72%
May 2	30°C	27°C	32°C 1998	26°C 1999	71%
May 3	30°C	27°C	32°C 1998	26°C 1999	71%
May 4	30°C	27°C	31°C 1991	25°C 1999	70%
May 5	30°C	27°C	32°C 1998	26°C 1994	70%
May 6	30°C	27°C	33°C 1998	25°C 1994	70%
May 7	30°C	27°C	33°C 1998	25°C 1994	70%
May 8	30°C	27°C	32°C 2016	25°C 1994	68%
May 9	30°C	27°C	31°C 2000	25°C 1999	68%
May 10	30°C	27°C	31°C 2004	26°C 2008	69%
May 11	30°C	27°C	31°C 1992	26°C 2012	68%
May 12	30°C	27°C	31°C 2020	26°C 2000	67%
May 13	30°C	27°C	31°C 1996	26°C 1999	67%
May 14	30°C	27°C	32°C 1996	26°C 1999	67%
May 15	29°C	27°C	31°C 1996	26°C 2012	67%
May 16	29°C	27°C	32°C 1996	26°C 2012	67%
May 17	29°C	27°C	31°C 1996	26°C 2012	66%
May 18	29°C	27°C	31°C 2000	26°C 2018	67%
May 19	29°C	27°C	31°C 1996	26°C 2018	67%
May 20	29°C	27°C	32°C 1996	26°C 1994	66%
May 21	29°C	27°C	32°C 1996	25°C 1995	66%
May 22	29°C	27°C	32°C 2000	25°C 1995	66%
May 23	29°C	27°C	32°C 1998	26°C 1995	67%
May 24	29°C	27°C	32°C 1998	26°C 1995	68%
May 25	29°C	27°C	31°C 1998	26°C 2008	67%
May 26	29°C	27°C	31°C 1998	26°C 1999	68%
May 27	29°C	27°C	31°C 1991	26°C 1999	68%
May 28	29°C	27°C	30°C 1991	26°C 1999	68%
May 29	29°C	27°C	31°C 1997	25°C 1999	69%
May 30	29°C	27°C	30°C 1998	26°C 2004	69%
May 31	29°C	27°C	31°C 1997	26°C 2006	70%

Chance of rain

Chance of a wet day

Sunrise and sunset

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

May 1: sunrise 5:55 AM, sunset 6:15 PM
May 31: sunrise 5:52 AM, sunset 6:19 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 2026-09-25. Sun and moon: computed with the NOAA solar equations and Meeus.