Climate averages 1991–2020
Sasolburg weather
in December.
A warm, wet month: the warmest and the wettest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a warm month in Sasolburg: daytime highs average 26.6°C and nights cool to about 15.5°C. By daytime temperature it is the warmest month of the year.
Expect about 137 mm of rain on roughly 17 days, which makes December a wet month (the wettest month of the year). Daylight, from sunrise to sunset, lasts about 13 h 47 min on an average December day.
The nearest other city in this atlas is Vanderbijlpark (12 km away). In December its highs average 26.4°C, about as warm as Sasolburg, with 137 mm of rain.
Among the 95 cities listed in South Africa, Sasolburg ranks joint 40th of 95 for the warmest December highs and joint 69th of 95 for the driest December (rainfall, lowest first). The mean December high of those 95 cities is 26.6°C; Sasolburg is level with that mean.
From December to January, average highs fall by 0.1°C to 26.5°C, and monthly rainfall falls from 137 mm to 132 mm.
The annual picture
December in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Sasolburg climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 26.5°C15.9°C | 15.9°C | 132 | 16.1 | 13.614 h |
| February | 26.2°C15.6°C | 15.6°C | 105 | 13.0 | 13.013 h |
| March | 24.9°C14.0°C | 14.0°C | 86 | 11.5 | 12.312 h |
| April | 22.5°C10.7°C | 10.7°C | 41 | 6.9 | 11.511 h |
| May | 20.1°C6.7°C | 6.7°C | 18 | 3.1 | 10.811 h |
| June | 17.6°C3.4°C | 3.4°C | 8.2 | 1.6 | 10.510 h |
| July | 17.8°C2.7°C | 2.7°C | 3.6 | 0.8 | 10.611 h |
| August | 21.1°C5.6°C | 5.6°C | 12 | 2.2 | 11.211 h |
| September | 25.3°C9.8°C | 9.8°C | 20 | 3.6 | 11.912 h |
| October | 26.5°C12.6°C | 12.6°C | 77 | 10.4 | 12.713 h |
| November | 26.3°C13.9°C | 13.9°C | 104 | 13.0 | 13.413 h |
| December, selected | 26.6°C15.5°C | 15.5°C | 137 | 17.0 | 13.814 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
December in nearby cities
- Vanderbijlpark in DecemberSouth Africa · 12 kmHigh 26.4°C · Low 15.4°C · 137 mm rain
- Vereeniging in DecemberSouth Africa · 19 kmHigh 26.6°C · Low 15.7°C · 137 mm rain
- Evaton in DecemberSouth Africa · 31 kmHigh 26.1°C · Low 15.4°C · 139 mm rain
- Parys in DecemberSouth Africa · 37 kmHigh 27.7°C · Low 16.1°C · 129 mm rain
- Westonaria in DecemberSouth Africa · 57 kmHigh 25.5°C · Low 15.1°C · 141 mm rain
- Tokoza in DecemberSouth Africa · 59 kmHigh 25.5°C · Low 14.9°C · 130 mm rain
- Soweto in DecemberSouth Africa · 61 kmHigh 24.9°C · Low 14.6°C · 141 mm rain
- Heidelberg, South Africa in DecemberSouth Africa · 64 kmHigh 25.7°C · Low 15.0°C · 140 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Sasolburg) is explained once on the Sasolburg year overview and on the Sources, method and limits page.
Vanderbijlpark lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.