Tainan Weather in December

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

Average highs run from 25°C on December 1 to 22°C on December 31, and lows from 21°C to 19°C. Normal precipitation for the month is 31 mm over about 6 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: 23°C
Average low: 20°C
Precipitation: 31 mm
Reanalysis high: 28°CDec 5, 2002
Reanalysis low: 13°CDec 22, 1999
Daylight: 10 h 50 min to 10 h 44 min
Cloud cover: 51%
Humidity: 77%
Dew point: 17°C
Wind: 20.9 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	25°C	21°C	27°C 1998	18°C 2003	18%
Dec 2	25°C	21°C	28°C 2002	18°C 2011	18%
Dec 3	25°C	21°C	28°C 2002	18°C 2009	17%
Dec 4	24°C	21°C	27°C 2018	18°C 2009	15%
Dec 5	24°C	21°C	28°C 2002	17°C 2005	14%
Dec 6	24°C	21°C	28°C 2002	16°C 2005	14%
Dec 7	24°C	21°C	28°C 2002	16°C 1996	14%
Dec 8	24°C	21°C	28°C 2006	17°C 1995	14%
Dec 9	24°C	21°C	27°C 2006	17°C 2010	14%
Dec 10	24°C	21°C	28°C 1994	17°C 2002	14%
Dec 11	24°C	20°C	27°C 1994	18°C 1997	16%
Dec 12	24°C	20°C	27°C 1994	17°C 2014	16%
Dec 13	24°C	20°C	26°C 2010	18°C 2014	17%
Dec 14	23°C	20°C	26°C 2012	17°C 2005	17%
Dec 15	23°C	20°C	27°C 2012	17°C 2005	16%
Dec 16	23°C	20°C	27°C 2012	15°C 2010	16%
Dec 17	23°C	20°C	28°C 2002	15°C 2010	16%
Dec 18	23°C	20°C	28°C 2002	17°C 2014	16%
Dec 19	23°C	20°C	28°C 2000	16°C 2009	16%
Dec 20	23°C	20°C	26°C 1997	15°C 1999	17%
Dec 21	23°C	19°C	27°C 2016	15°C 1999	17%
Dec 22	23°C	19°C	26°C 2018	13°C 1999	17%
Dec 23	23°C	19°C	26°C 2015	13°C 1999	17%
Dec 24	22°C	19°C	26°C 2015	15°C 1999	17%
Dec 25	22°C	19°C	25°C 1994	15°C 1999	16%
Dec 26	22°C	19°C	25°C 1992	16°C 2010	15%
Dec 27	22°C	19°C	26°C 1992	15°C 2013	15%
Dec 28	22°C	19°C	26°C 2020	13°C 1991	14%
Dec 29	22°C	19°C	26°C 2012	13°C 1991	14%
Dec 30	22°C	19°C	25°C 1997	14°C 2012	15%
Dec 31	22°C	19°C	25°C 1997	13°C 2004	15%

Chance of rain

Chance of a wet day

Sunrise and sunset

Times for 2026, local time (GMT+8).

December 1: sunrise 6:23 AM, sunset 5:13 PM
December 31: sunrise 6:40 AM, sunset 5:24 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.