Climate averages 1991–2020
Ermelo weather
in December.
A warm, wet month: the joint 2nd warmest and the wettest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a warm month in Ermelo: daytime highs average 23.3°C and nights cool to about 13.4°C. By daytime temperature it is the joint 2nd warmest of the 12 months.
Expect about 163 mm of rain on roughly 18 days, which makes December a wet month (the wettest month of the year). Daylight, from sunrise to sunset, lasts about 13 h 46 min on an average December day.
The nearest other city in this atlas is Bethal (52 km away). In December its highs average 24.1°C, 0.8°C warmer than Ermelo, with 145 mm of rain.
Among the 95 cities listed in South Africa, Ermelo ranks 93rd of 95 for the warmest December highs and 93rd of 95 for the driest December (rainfall, lowest first). The mean December high of those 95 cities is 26.6°C; Ermelo is 3.3°C cooler than that mean.
From December to January, average highs fall by 0.1°C to 23.3°C, and monthly rainfall falls from 163 mm to 143 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
Ermelo climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 23.3°C13.8°C | 13.8°C | 143 | 16.9 | 13.614 h |
| February | 23.3°C13.7°C | 13.7°C | 102 | 12.4 | 13.013 h |
| March | 22.4°C12.4°C | 12.4°C | 90 | 11.3 | 12.312 h |
| April | 20.4°C9.7°C | 9.7°C | 45 | 7.0 | 11.511 h |
| May | 18.5°C6.3°C | 6.3°C | 15 | 2.7 | 10.811 h |
| June | 16.3°C3.3°C | 3.3°C | 6.8 | 1.3 | 10.511 h |
| July | 16.4°C2.8°C | 2.8°C | 6.5 | 0.8 | 10.611 h |
| August | 19.5°C5.5°C | 5.5°C | 14 | 2.5 | 11.211 h |
| September | 23.2°C8.8°C | 8.8°C | 26 | 4.5 | 11.912 h |
| October | 23.4°C10.7°C | 10.7°C | 96 | 12.6 | 12.713 h |
| November | 22.9°C11.9°C | 11.9°C | 128 | 15.5 | 13.413 h |
| December, selected | 23.3°C13.4°C | 13.4°C | 163 | 18.1 | 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
- Bethal in DecemberSouth Africa · 52 kmHigh 24.1°C · Low 13.7°C · 145 mm rain
- Standerton in DecemberSouth Africa · 86 kmHigh 24.9°C · Low 14.0°C · 150 mm rain
- eMbalenhle in DecemberSouth Africa · 91 kmHigh 24.9°C · Low 14.4°C · 151 mm rain
- Piet Retief in DecemberSouth Africa · 98 kmHigh 24.9°C · Low 14.8°C · 155 mm rain
- Middelburg in DecemberSouth Africa · 99 kmHigh 25.3°C · Low 15.1°C · 114 mm rain
- Emalahleni in DecemberSouth Africa · 105 kmHigh 24.6°C · Low 14.2°C · 123 mm rain
- Mbabane in DecemberEswatini · 117 kmHigh 24.5°C · Low 15.5°C · 208 mm rain
- Newcastle, South Africa in DecemberSouth Africa · 136 kmHigh 26.2°C · Low 15.0°C · 155 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 Ermelo) is explained once on the Ermelo year overview and on the Sources, method and limits page.