Cha-am Weather in December

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

Average highs run from 29°C on December 1 to 29°C on December 31, and lows from 23°C to 22°C. Normal precipitation for the month is 12 mm over about 3 wet days.

December day by day

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

Normal low
Normal high
Reanalysis extreme high
Reanalysis extreme low

December at a glance

Average high: 29°C
Average low: 22°C
Precipitation: 12 mm
Reanalysis high: 33°CDec 15, 2015
Reanalysis low: 12°CDec 25, 1999
Daylight: 11 h 26 min to 11 h 24 min
Cloud cover: 43%
Humidity: 74%
Dew point: 20°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
Dec 1	29°C	23°C	32°C 2006	18°C 1992	18%
Dec 2	29°C	23°C	32°C 2006	17°C 1992	17%
Dec 3	29°C	23°C	32°C 2015	17°C 1992	16%
Dec 4	29°C	23°C	31°C 1993	19°C 1992	14%
Dec 5	29°C	23°C	31°C 2018	20°C 2019	14%
Dec 6	29°C	23°C	32°C 1997	18°C 2019	14%
Dec 7	29°C	23°C	32°C 1997	17°C 2019	14%
Dec 8	29°C	23°C	32°C 2006	17°C 1995	14%
Dec 9	29°C	23°C	32°C 2006	18°C 1995	14%
Dec 10	29°C	23°C	32°C 2006	18°C 1995	14%
Dec 11	29°C	22°C	32°C 2015	19°C 2008	12%
Dec 12	29°C	22°C	32°C 2015	18°C 2011	10%
Dec 13	29°C	22°C	33°C 2015	18°C 2011	9%
Dec 14	29°C	22°C	32°C 2015	19°C 1998	8%
Dec 15	29°C	22°C	33°C 2015	19°C 1998	6%
Dec 16	29°C	22°C	32°C 2009	18°C 1998	6%
Dec 17	29°C	22°C	32°C 1997	19°C 2016	6%
Dec 18	29°C	22°C	32°C 1997	18°C 2013	6%
Dec 19	29°C	22°C	32°C 1997	16°C 2017	6%
Dec 20	29°C	22°C	32°C 1997	15°C 2017	6%
Dec 21	29°C	22°C	32°C 1997	15°C 2017	6%
Dec 22	29°C	22°C	32°C 1997	16°C 2013	6%
Dec 23	29°C	22°C	32°C 1997	14°C 1999	6%
Dec 24	29°C	21°C	32°C 1997	13°C 1999	5%
Dec 25	29°C	21°C	32°C 2009	12°C 1999	5%
Dec 26	29°C	21°C	32°C 2009	13°C 1999	5%
Dec 27	29°C	21°C	32°C 2009	14°C 1999	6%
Dec 28	29°C	22°C	32°C 2009	15°C 1999	6%
Dec 29	29°C	22°C	32°C 1997	16°C 2013	7%
Dec 30	29°C	22°C	32°C 1997	16°C 1995	8%
Dec 31	29°C	22°C	32°C 1997	16°C 1995	8%

Chance of rain

Chance of a wet day

Sunrise and sunset

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

December 1: sunrise 6:26 AM, sunset 5:52 PM
December 31: sunrise 6:41 AM, sunset 6:05 PM

Every day of December: 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.