Climate averages 1991–2020
Newcastle, South Africa 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 Newcastle, South Africa: daytime highs average 26.2°C and nights cool to about 15.0°C. By daytime temperature it is the warmest month of the year.
Expect about 155 mm of rain on roughly 19 days, which makes December a wet month (the wettest month of the year). Daylight, from sunrise to sunset, lasts about 13 h 52 min on an average December day.
The nearest other city in this atlas is Dundee, South Africa (54 km away). In December its highs average 26.3°C, about as warm as Newcastle, South Africa, with 154 mm of rain.
Among the 95 cities listed in South Africa, Newcastle, South Africa ranks joint 46th of 95 for the warmest December highs and joint 89th of 95 for the driest December (rainfall, lowest first). The mean December high of those 95 cities is 26.6°C; Newcastle, South Africa is 0.4°C cooler than that mean.
From December to January, average highs fall by 0.1°C to 26.1°C, and monthly rainfall falls from 155 mm to 141 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
Newcastle, South Africa climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 26.1°C15.6°C | 15.6°C | 141 | 17.6 | 13.714 h |
| February | 26.1°C15.6°C | 15.6°C | 102 | 13.3 | 13.113 h |
| March | 24.9°C14.0°C | 14.0°C | 99 | 11.8 | 12.312 h |
| April | 22.6°C11.1°C | 11.1°C | 45 | 7.4 | 11.411 h |
| May | 20.7°C7.4°C | 7.4°C | 17 | 2.9 | 10.811 h |
| June | 18.4°C4.4°C | 4.4°C | 10 | 2.2 | 10.410 h |
| July | 18.4°C3.8°C | 3.8°C | 13 | 2.1 | 10.611 h |
| August | 21.3°C6.3°C | 6.3°C | 22 | 3.9 | 11.111 h |
| September | 24.7°C9.7°C | 9.7°C | 40 | 7.0 | 11.912 h |
| October | 25.1°C11.8°C | 11.8°C | 94 | 13.7 | 12.713 h |
| November | 25.6°C13.4°C | 13.4°C | 120 | 16.5 | 13.513 h |
| December, selected | 26.2°C15.0°C | 15.0°C | 155 | 18.9 | 13.914 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
- Dundee, South Africa in DecemberSouth Africa · 54 kmHigh 26.3°C · Low 15.1°C · 154 mm rain
- Vryheid in DecemberSouth Africa · 85 kmHigh 25.5°C · Low 15.0°C · 158 mm rain
- Ladysmith in DecemberSouth Africa · 90 kmHigh 27.9°C · Low 15.8°C · 179 mm rain
- Standerton in DecemberSouth Africa · 114 kmHigh 24.9°C · Low 14.0°C · 150 mm rain
- Piet Retief in DecemberSouth Africa · 121 kmHigh 24.9°C · Low 14.8°C · 155 mm rain
- Ermelo in DecemberSouth Africa · 136 kmHigh 23.3°C · Low 13.4°C · 163 mm rain
- Phuthaditjhaba in DecemberSouth Africa · 139 kmHigh 23.9°C · Low 12.8°C · 168 mm rain
- Bethal in DecemberSouth Africa · 152 kmHigh 24.1°C · Low 13.7°C · 145 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 Newcastle) is explained once on the Newcastle, South Africa year overview and on the Sources, method and limits page.