Knysna Weather in December

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

Average highs run from 24°C on December 1 to 26°C on December 31, and lows from 14°C to 16°C. Normal precipitation for the month is 40 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: 25°C
Average low: 15°C
Precipitation: 40 mm
Reanalysis high: 38°CDec 7, 2002
Reanalysis low: 10°CDec 3, 1996
Daylight: 14 h 14 min to 14 h 23 min
Cloud cover: 46%
Humidity: 72%
Dew point: 14°C
Wind: 10.8 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	24°C	14°C	31°C 1999	11°C 1995	24%
Dec 2	24°C	14°C	30°C 2003	11°C 1996	23%
Dec 3	24°C	14°C	32°C 2016	10°C 1996	23%
Dec 4	24°C	14°C	34°C 2004	10°C 2007	22%
Dec 5	24°C	15°C	32°C 1998	11°C 1991	22%
Dec 6	24°C	15°C	33°C 2006	12°C 2010	21%
Dec 7	24°C	15°C	38°C 2002	11°C 2010	21%
Dec 8	25°C	15°C	34°C 2017	12°C 2011	21%
Dec 9	25°C	15°C	29°C 1999	12°C 2011	21%
Dec 10	25°C	15°C	31°C 1999	12°C 2006	21%
Dec 11	25°C	15°C	30°C 2018	10°C 1994	20%
Dec 12	25°C	15°C	33°C 2004	12°C 1994	19%
Dec 13	25°C	15°C	34°C 1999	11°C 2005	19%
Dec 14	25°C	15°C	34°C 1991	12°C 2017	20%
Dec 15	25°C	15°C	32°C 2001	11°C 2011	21%
Dec 16	25°C	15°C	31°C 2003	12°C 2011	22%
Dec 17	25°C	15°C	35°C 2019	12°C 1997	23%
Dec 18	25°C	15°C	34°C 1991	11°C 1997	24%
Dec 19	25°C	15°C	29°C 1998	12°C 1997	25%
Dec 20	25°C	15°C	36°C 1997	12°C 2017	26%
Dec 21	25°C	15°C	34°C 2012	12°C 2005	26%
Dec 22	25°C	15°C	32°C 2007	13°C 2019	26%
Dec 23	25°C	16°C	33°C 1993	12°C 1998	26%
Dec 24	25°C	16°C	32°C 1991	13°C 2008	27%
Dec 25	25°C	16°C	29°C 2004	11°C 2008	28%
Dec 26	25°C	16°C	33°C 1996	10°C 2003	27%
Dec 27	26°C	16°C	32°C 2012	11°C 2003	27%
Dec 28	26°C	16°C	34°C 2001	11°C 2003	27%
Dec 29	26°C	16°C	32°C 2004	14°C 2003	27%
Dec 30	26°C	16°C	36°C 2015	14°C 2005	28%
Dec 31	26°C	16°C	31°C 2018	13°C 2006	29%

Chance of rain

Chance of a wet day

Sunrise and sunset

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

December 1: sunrise 5:10 AM, sunset 7:24 PM
December 31: sunrise 5:19 AM, sunset 7:42 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 2026-09-25. Sun and moon: computed with the NOAA solar equations and Meeus.