Cát Bà Weather in December

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

Average highs run from 23°C on December 1 to 20°C on December 31, and lows from 20°C to 17°C. Normal precipitation for the month is 28 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: 21°C
Average low: 18°C
Precipitation: 28 mm
Reanalysis high: 27°CDec 6, 2018
Reanalysis low: 8°CDec 28, 1991
Daylight: 10 h 58 min to 10 h 54 min
Cloud cover: 69%
Humidity: 76%
Dew point: 15°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	23°C	20°C	26°C 1998	16°C 2011	22%
Dec 2	23°C	20°C	26°C 2015	15°C 2011	21%
Dec 3	23°C	20°C	26°C 2018	16°C 2019	20%
Dec 4	22°C	20°C	26°C 2018	15°C 2020	19%
Dec 5	22°C	19°C	26°C 2018	15°C 2005	18%
Dec 6	22°C	19°C	27°C 2018	13°C 2005	18%
Dec 7	22°C	19°C	26°C 2002	13°C 2005	19%
Dec 8	22°C	19°C	26°C 2006	15°C 2002	20%
Dec 9	22°C	19°C	24°C 1994	14°C 2002	19%
Dec 10	22°C	19°C	25°C 1994	14°C 2011	18%
Dec 11	21°C	19°C	25°C 1994	13°C 2011	18%
Dec 12	21°C	18°C	25°C 1994	14°C 2018	17%
Dec 13	21°C	18°C	25°C 2015	14°C 2000	17%
Dec 14	21°C	18°C	25°C 1992	13°C 2001	16%
Dec 15	21°C	18°C	25°C 2009	12°C 2010	15%
Dec 16	21°C	18°C	25°C 2012	9°C 2010	15%
Dec 17	21°C	18°C	25°C 2012	12°C 1993	15%
Dec 18	21°C	18°C	25°C 2002	13°C 2013	15%
Dec 19	21°C	18°C	25°C 2002	12°C 2013	16%
Dec 20	21°C	18°C	25°C 1998	12°C 2013	17%
Dec 21	21°C	18°C	26°C 1998	13°C 1999	17%
Dec 22	21°C	18°C	26°C 1998	11°C 1999	16%
Dec 23	20°C	18°C	24°C 1998	11°C 1999	15%
Dec 24	20°C	17°C	24°C 2015	13°C 1999	16%
Dec 25	20°C	17°C	24°C 1991	14°C 2013	16%
Dec 26	20°C	17°C	24°C 1991	10°C 2002	16%
Dec 27	20°C	17°C	24°C 1991	9°C 2002	16%
Dec 28	20°C	17°C	23°C 1997	8°C 1991	17%
Dec 29	20°C	17°C	24°C 1997	10°C 1991	18%
Dec 30	20°C	17°C	24°C 1997	11°C 2012	18%
Dec 31	20°C	17°C	24°C 1997	11°C 2004	18%

Chance of rain

Chance of a wet day

Sunrise and sunset

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

December 1: sunrise 6:12 AM, sunset 5:10 PM
December 31: sunrise 6:28 AM, sunset 5:22 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.