Johannesburg Weather in December
Average highs run from 28°C on December 1 to 29°C on December 31, and lows from 15°C to 17°C. Normal precipitation for the month is 127 mm over about 22 wet days.
December day by day
The normal high and low for each date, and the record, in °C.
- Normal low
- Normal high
- Record high
- Record low
December at a glance
- Average high
- 28°C
- Average low
- 16°C
- Precipitation
- 127 mm
- Record high
- 36°CDec 7, 2015
- Record low
- 6°CDec 12, 1994
- Daylight
- 13 h 40 min to 13 h 45 min
- Cloud cover
- 65%
- Humidity
- 63%
- Dew point
- 13°C
- Wind
- 11.9 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 | Record high | Record low | Chance wet |
|---|---|---|---|---|---|
| Dec 1 | 28°C | 15°C | 34°C 2015 | 7°C 1995 | 61% |
| Dec 2 | 28°C | 15°C | 34°C 2015 | 9°C 1995 | 62% |
| Dec 3 | 28°C | 16°C | 35°C 2002 | 12°C 1998 | 65% |
| Dec 4 | 29°C | 15°C | 36°C 2024 | 7°C 1998 | 66% |
| Dec 5 | 28°C | 15°C | 36°C 2024 | 10°C 1998 | 65% |
| Dec 6 | 28°C | 15°C | 36°C 2024 | 11°C 1998 | 66% |
| Dec 7 | 28°C | 16°C | 36°C 2015 | 13°C 2022 | 67% |
| Dec 8 | 27°C | 16°C | 36°C 2015 | 10°C 2001 | 67% |
| Dec 9 | 27°C | 15°C | 34°C 2023 | 10°C 1995 | 68% |
| Dec 10 | 27°C | 15°C | 35°C 2024 | 12°C 2004 | 69% |
| Dec 11 | 28°C | 15°C | 35°C 2015 | 11°C 1994 | 69% |
| Dec 12 | 28°C | 15°C | 36°C 2024 | 6°C 1994 | 70% |
| Dec 13 | 28°C | 15°C | 36°C 2024 | 10°C 1994 | 70% |
| Dec 14 | 28°C | 16°C | 35°C 2024 | 12°C 1999 | 69% |
| Dec 15 | 28°C | 16°C | 34°C 2024 | 14°C 2009 | 69% |
| Dec 16 | 29°C | 16°C | 34°C 2003 | 13°C 1994 | 68% |
| Dec 17 | 29°C | 16°C | 33°C 2024 | 14°C 2000 | 68% |
| Dec 18 | 29°C | 16°C | 33°C 2005 | 12°C 2021 | 67% |
| Dec 19 | 29°C | 16°C | 33°C 2015 | 10°C 2007 | 67% |
| Dec 20 | 29°C | 16°C | 34°C 2018 | 12°C 2007 | 68% |
| Dec 21 | 29°C | 16°C | 34°C 2003 | 13°C 2007 | 67% |
| Dec 22 | 29°C | 17°C | 34°C 2003 | 14°C 2022 | 67% |
| Dec 23 | 29°C | 17°C | 33°C 2015 | 12°C 2022 | 67% |
| Dec 24 | 29°C | 17°C | 35°C 2015 | 13°C 2004 | 67% |
| Dec 25 | 29°C | 16°C | 35°C 2015 | 11°C 1994 | 67% |
| Dec 26 | 29°C | 17°C | 36°C 2018 | 12°C 2001 | 67% |
| Dec 27 | 28°C | 16°C | 36°C 2018 | 12°C 2003 | 66% |
| Dec 28 | 29°C | 17°C | 35°C 2018 | 12°C 2001 | 66% |
| Dec 29 | 28°C | 16°C | 34°C 2015 | 11°C 2001 | 65% |
| Dec 30 | 28°C | 16°C | 34°C 2015 | 12°C 2007 | 64% |
| Dec 31 | 29°C | 17°C | 33°C 2003 | 12°C 2007 | 62% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (GMT+2).
- December 1
- sunrise 5:07 AM, sunset 6:47 PM
- December 31
- sunrise 5:18 AM, sunset 7:03 PM
Other months
Sources
Records: NOAA GHCN-Daily, station SFM00068263, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: 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.