Grahamstown Weather in December

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

Average highs run from 26°C on December 1 to 28°C on December 31, and lows from 15°C to 17°C. Normal precipitation for the month is 62 mm over about 12 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: 27°C
Average low: 16°C
Precipitation: 62 mm
Reanalysis high: 41°CDec 22, 2012
Reanalysis low: 10°CDec 3, 1996
Daylight: 14 h 12 min to 14 h 19 min
Cloud cover: 60%
Humidity: 72%
Dew point: 15°C
Wind: 18.4 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	26°C	15°C	33°C 1997	12°C 2008	35%
Dec 2	26°C	15°C	39°C 2007	10°C 1995	35%
Dec 3	26°C	15°C	35°C 2016	10°C 1996	36%
Dec 4	26°C	15°C	36°C 2004	12°C 2007	36%
Dec 5	26°C	15°C	35°C 2004	12°C 1991	35%
Dec 6	26°C	15°C	38°C 2019	12°C 2014	34%
Dec 7	26°C	16°C	35°C 2003	12°C 2010	35%
Dec 8	26°C	16°C	36°C 1994	12°C 2010	35%
Dec 9	27°C	16°C	32°C 2007	13°C 2011	35%
Dec 10	27°C	16°C	32°C 2015	12°C 2005	35%
Dec 11	27°C	16°C	33°C 2018	11°C 2006	34%
Dec 12	27°C	16°C	41°C 2004	11°C 1994	33%
Dec 13	27°C	16°C	35°C 1992	11°C 2005	33%
Dec 14	27°C	16°C	35°C 1999	13°C 2017	34%
Dec 15	27°C	16°C	34°C 2015	11°C 2011	35%
Dec 16	27°C	16°C	35°C 2003	12°C 2019	35%
Dec 17	27°C	16°C	39°C 2019	13°C 2019	36%
Dec 18	27°C	16°C	37°C 2018	13°C 1997	36%
Dec 19	27°C	16°C	37°C 1998	12°C 2017	37%
Dec 20	28°C	16°C	38°C 1997	12°C 2017	38%
Dec 21	27°C	16°C	38°C 2009	13°C 2005	38%
Dec 22	28°C	17°C	41°C 2012	13°C 1991	38%
Dec 23	28°C	17°C	39°C 2019	14°C 1991	38%
Dec 24	28°C	17°C	38°C 1998	14°C 2008	38%
Dec 25	28°C	17°C	33°C 2004	12°C 2008	40%
Dec 26	28°C	17°C	35°C 1992	13°C 2003	41%
Dec 27	28°C	17°C	38°C 2012	11°C 2003	42%
Dec 28	28°C	17°C	35°C 2015	13°C 2009	42%
Dec 29	28°C	17°C	36°C 2018	14°C 2005	40%
Dec 30	28°C	17°C	40°C 2007	14°C 2005	41%
Dec 31	28°C	17°C	36°C 2007	14°C 2006	41%

Chance of rain

Chance of a wet day

Sunrise and sunset

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

December 1: sunrise 4:57 AM, sunset 7:09 PM
December 31: sunrise 5:07 AM, sunset 7:26 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.