Óc Eo Weather in May

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

Average highs run from 35°C on May 1 to 31°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: 33°C
Average low: 27°C
Precipitation: 161 mm
Reanalysis high: 40°CMay 7, 2016
Reanalysis low: 25°CMay 13, 1999
Daylight: 12 h 29 min to 12 h 40 min
Cloud cover: 79%
Humidity: 77%
Dew point: 25°C
Wind: 13.0 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	35°C	27°C	39°C 2005	25°C 1997	54%
May 2	35°C	27°C	39°C 1998	25°C 1997	55%
May 3	34°C	27°C	40°C 2005	25°C 1995	56%
May 4	34°C	27°C	40°C 2005	25°C 1996	59%
May 5	34°C	27°C	38°C 2002	25°C 1996	61%
May 6	34°C	27°C	39°C 1998	26°C 1995	61%
May 7	34°C	27°C	40°C 2016	26°C 1999	62%
May 8	34°C	27°C	39°C 2010	25°C 2017	64%
May 9	33°C	27°C	38°C 2010	26°C 1999	66%
May 10	33°C	27°C	39°C 2016	25°C 1999	68%
May 11	33°C	27°C	38°C 2016	25°C 2009	68%
May 12	33°C	27°C	39°C 1998	25°C 1999	69%
May 13	33°C	27°C	38°C 1998	25°C 1999	69%
May 14	33°C	27°C	38°C 2016	25°C 1999	70%
May 15	32°C	27°C	37°C 2016	25°C 1999	71%
May 16	32°C	27°C	37°C 2010	25°C 1996	71%
May 17	32°C	27°C	39°C 2010	25°C 1999	72%
May 18	32°C	27°C	36°C 2015	25°C 2009	74%
May 19	32°C	27°C	37°C 1998	25°C 1993	75%
May 20	32°C	27°C	37°C 1998	25°C 1994	74%
May 21	32°C	27°C	36°C 1998	25°C 1994	74%
May 22	32°C	27°C	35°C 1998	25°C 1991	75%
May 23	32°C	27°C	35°C 2010	25°C 2018	74%
May 24	31°C	27°C	34°C 1998	25°C 2008	74%
May 25	31°C	27°C	34°C 2020	25°C 2018	74%
May 26	31°C	27°C	34°C 2020	25°C 1994	75%
May 27	31°C	27°C	34°C 2014	25°C 1999	77%
May 28	31°C	27°C	34°C 1998	26°C 1991	78%
May 29	31°C	27°C	33°C 2004	25°C 1991	78%
May 30	31°C	27°C	34°C 1993	26°C 2001	78%
May 31	31°C	27°C	34°C 2015	25°C 1996	80%

Chance of rain

Chance of a wet day

Sunrise and sunset

Times for 2026, local time (GMT+7).

May 1: sunrise 5:42 AM, sunset 6:11 PM
May 31: sunrise 5:37 AM, sunset 6:17 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.