Jaffna Weather in May

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

Average highs run from 31°C on May 1 to 31°C on May 31, and lows from 28°C to 28°C. Normal precipitation for the month is 74 mm over about 9 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: 31°C
Average low: 28°C
Precipitation: 74 mm
Reanalysis high: 34°CMay 2, 1998
Reanalysis low: 27°CMay 17, 1999
Daylight: 12 h 28 min to 12 h 39 min
Cloud cover: 60%
Humidity: 78%
Dew point: 25°C
Wind: 25.6 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	31°C	28°C	33°C 1998	27°C 1999	41%
May 2	31°C	29°C	34°C 1998	27°C 1999	41%
May 3	31°C	29°C	33°C 1998	27°C 1999	40%
May 4	31°C	29°C	33°C 2020	27°C 2002	40%
May 5	31°C	29°C	33°C 2020	27°C 2014	40%
May 6	31°C	29°C	33°C 1998	27°C 1999	40%
May 7	31°C	29°C	33°C 1998	27°C 1999	39%
May 8	31°C	29°C	33°C 2000	27°C 1999	40%
May 9	31°C	29°C	33°C 2000	27°C 1999	40%
May 10	31°C	29°C	33°C 1993	28°C 1999	40%
May 11	31°C	29°C	32°C 2002	27°C 2011	39%
May 12	31°C	29°C	33°C 2010	27°C 2011	39%
May 13	31°C	29°C	32°C 2010	27°C 2011	38%
May 14	31°C	29°C	33°C 2017	27°C 1992	36%
May 15	31°C	29°C	33°C 2010	27°C 1997	34%
May 16	31°C	29°C	33°C 2010	27°C 1999	32%
May 17	31°C	29°C	33°C 2020	27°C 1999	31%
May 18	31°C	29°C	32°C 2019	27°C 1999	30%
May 19	31°C	29°C	32°C 2017	27°C 1999	31%
May 20	31°C	28°C	32°C 2000	28°C 1995	31%
May 21	31°C	28°C	32°C 2020	28°C 1995	30%
May 22	31°C	28°C	33°C 2000	27°C 1999	29%
May 23	31°C	28°C	33°C 2000	27°C 1992	27%
May 24	31°C	28°C	33°C 2000	27°C 1999	26%
May 25	31°C	28°C	32°C 1998	27°C 1999	25%
May 26	31°C	28°C	32°C 2011	27°C 1999	25%
May 27	31°C	28°C	32°C 2019	27°C 2004	24%
May 28	31°C	28°C	32°C 2019	27°C 1999	23%
May 29	31°C	28°C	32°C 2019	27°C 1994	24%
May 30	31°C	28°C	32°C 2019	27°C 1999	25%
May 31	31°C	28°C	32°C 2010	27°C 1994	26%

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 6:21 PM
May 31: sunrise 5:48 AM, sunset 6:27 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.