Vavuniya Weather in May

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

Average highs run from 34°C on May 1 to 33°C on May 31, and lows from 26°C to 26°C. Normal precipitation for the month is 87 mm over about 11 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: 33°C
Average low: 26°C
Precipitation: 87 mm
Reanalysis high: 38°CMay 10, 2019
Reanalysis low: 24°CMay 13, 2011
Daylight: 12 h 26 min to 12 h 36 min
Cloud cover: 60%
Humidity: 77%
Dew point: 24°C
Wind: 19.4 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	34°C	26°C	37°C 2016	25°C 2014	53%
May 2	34°C	26°C	37°C 2020	25°C 2015	52%
May 3	33°C	26°C	38°C 1996	25°C 2004	51%
May 4	33°C	26°C	38°C 1991	25°C 2015	50%
May 5	33°C	26°C	37°C 1998	25°C 1993	48%
May 6	33°C	26°C	38°C 2019	25°C 1993	47%
May 7	33°C	26°C	37°C 1996	25°C 1994	46%
May 8	33°C	26°C	37°C 2000	25°C 2017	45%
May 9	33°C	26°C	38°C 2000	25°C 1994	45%
May 10	33°C	26°C	38°C 2019	24°C 2011	43%
May 11	33°C	26°C	38°C 1996	24°C 2011	42%
May 12	33°C	26°C	38°C 1996	24°C 2011	42%
May 13	33°C	26°C	37°C 1996	24°C 2011	40%
May 14	33°C	26°C	37°C 2019	24°C 2011	37%
May 15	33°C	26°C	38°C 2019	24°C 2011	34%
May 16	33°C	26°C	38°C 1996	25°C 1997	33%
May 17	33°C	26°C	38°C 1996	25°C 2011	30%
May 18	33°C	26°C	37°C 1996	25°C 2018	29%
May 19	33°C	26°C	38°C 1996	24°C 2011	28%
May 20	33°C	26°C	38°C 1996	25°C 2014	28%
May 21	33°C	26°C	38°C 1996	25°C 2011	26%
May 22	33°C	26°C	38°C 1996	25°C 2018	25%
May 23	33°C	26°C	37°C 2000	25°C 1992	23%
May 24	33°C	26°C	37°C 1996	25°C 1992	22%
May 25	33°C	26°C	35°C 1995	25°C 1993	21%
May 26	33°C	26°C	35°C 2019	25°C 2018	20%
May 27	33°C	26°C	37°C 2019	25°C 1994	19%
May 28	33°C	26°C	38°C 2019	25°C 1992	19%
May 29	33°C	26°C	36°C 2019	25°C 2016	20%
May 30	33°C	26°C	35°C 2019	25°C 1999	21%
May 31	33°C	26°C	36°C 1997	26°C 2004	22%

Chance of rain

Chance of a wet day

Sunrise and sunset

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

May 1: sunrise 5:52 AM, sunset 6:18 PM
May 31: sunrise 5:48 AM, sunset 6:24 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 2026-09-27. Sun and moon: computed with the NOAA solar equations and Meeus.