Gansbaai Weather in December

NASA POWER reanalysis for the half-degree grid cell around Gansbaai, 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 25°C on December 31, and lows from 15°C to 17°C. Normal precipitation for the month is 34 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: 24°C
Average low: 16°C
Precipitation: 34 mm
Reanalysis high: 36°CDec 30, 2015
Reanalysis low: 11°CDec 3, 1996
Daylight: 14 h 18 min to 14 h 27 min
Cloud cover: 47%
Humidity: 71%
Dew point: 14°C
Wind: 20.5 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	15°C	32°C 1999	12°C 1996	17%
Dec 2	23°C	15°C	30°C 2013	12°C 1996	16%
Dec 3	23°C	15°C	31°C 2004	11°C 1996	16%
Dec 4	24°C	15°C	32°C 2004	12°C 1996	15%
Dec 5	24°C	16°C	32°C 2019	12°C 1993	14%
Dec 6	24°C	16°C	31°C 2002	14°C 2007	15%
Dec 7	24°C	16°C	33°C 2002	13°C 1998	14%
Dec 8	24°C	16°C	31°C 2017	13°C 2011	14%
Dec 9	24°C	16°C	29°C 2004	12°C 2011	15%
Dec 10	24°C	16°C	31°C 1999	13°C 1993	14%
Dec 11	24°C	16°C	31°C 2004	13°C 1994	12%
Dec 12	24°C	16°C	34°C 1994	14°C 2000	13%
Dec 13	24°C	16°C	35°C 1999	14°C 2014	13%
Dec 14	24°C	16°C	35°C 1999	14°C 2011	14%
Dec 15	24°C	16°C	30°C 1997	13°C 2017	14%
Dec 16	24°C	16°C	34°C 1993	13°C 2011	15%
Dec 17	24°C	16°C	35°C 1999	13°C 2005	15%
Dec 18	24°C	16°C	30°C 1991	14°C 1997	16%
Dec 19	24°C	16°C	27°C 2007	14°C 2017	17%
Dec 20	24°C	16°C	32°C 1997	14°C 2005	19%
Dec 21	24°C	16°C	34°C 2012	14°C 2005	19%
Dec 22	24°C	16°C	33°C 2007	13°C 1998	20%
Dec 23	24°C	16°C	33°C 1993	13°C 1998	20%
Dec 24	24°C	17°C	31°C 1991	14°C 1994	20%
Dec 25	24°C	17°C	30°C 2013	13°C 2003	20%
Dec 26	24°C	17°C	32°C 2012	14°C 2017	20%
Dec 27	25°C	17°C	29°C 1999	14°C 2003	20%
Dec 28	25°C	17°C	34°C 2001	14°C 2009	20%
Dec 29	25°C	17°C	32°C 1999	14°C 2003	19%
Dec 30	25°C	17°C	36°C 2015	15°C 2003	19%
Dec 31	25°C	17°C	30°C 2018	14°C 2006	19%

Chance of rain

Chance of a wet day

Sunrise and sunset

Times for 2026, local time (GMT+2).

December 1: sunrise 5:23 AM, sunset 7:41 PM
December 31: sunrise 5:32 AM, sunset 7:59 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.