Climate averages 1991–2020
Mossel Bay weather
in December.
A warm, fairly dry month: the 4th warmest and the 3rd driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
December is a warm month in Mossel Bay: daytime highs average 23.4°C and nights cool to about 16.8°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 35 mm of rain on roughly 7 days, which makes December a fairly dry month (the 3rd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 23 min on an average December day.
The nearest other city in this atlas is George (38 km away). In December its highs average 22.3°C, 1.1°C cooler than Mossel Bay, with 47 mm of rain.
Among the 95 cities listed in South Africa, Mossel Bay ranks 92nd of 95 for the warmest December highs and 9th of 95 for the driest December (rainfall, lowest first). The mean December high of those 95 cities is 26.6°C; Mossel Bay is 3.2°C cooler than that mean.
From December to January, average highs rise by 0.9°C to 24.4°C, and monthly rainfall rises from 35 mm to 38 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
Mossel Bay climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 24.4°C17.9°C | 17.9°C | 38 | 7.5 | 14.114 h |
| February | 24.6°C18.2°C | 18.2°C | 30 | 6.8 | 13.313 h |
| March | 23.7°C17.1°C | 17.1°C | 41 | 7.4 | 12.312 h |
| April | 22.1°C14.8°C | 14.8°C | 43 | 6.7 | 11.311 h |
| May | 20.8°C12.8°C | 12.8°C | 40 | 6.2 | 10.410 h |
| June | 19.0°C10.3°C | 10.3°C | 37 | 6.9 | 9.910 h |
| July | 18.4°C9.5°C | 9.5°C | 38 | 7.2 | 10.110 h |
| August | 18.5°C9.9°C | 9.9°C | 47 | 7.6 | 10.911 h |
| September | 19.3°C11.2°C | 11.2°C | 33 | 6.5 | 11.912 h |
| October | 20.5°C13.2°C | 13.2°C | 43 | 7.4 | 12.913 h |
| November | 21.5°C14.7°C | 14.7°C | 52 | 7.7 | 13.914 h |
| December, selected | 23.4°C16.8°C | 16.8°C | 35 | 6.8 | 14.414 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
- George in DecemberSouth Africa · 38 kmHigh 22.3°C · Low 15.3°C · 47 mm rain
- Oudtshoorn in DecemberSouth Africa · 65 kmHigh 28.5°C · Low 14.7°C · 31 mm rain
- Worcester, South Africa in DecemberSouth Africa · 256 kmHigh 29.0°C · Low 15.8°C · 24 mm rain
- Paarl in DecemberSouth Africa · 297 kmHigh 28.9°C · Low 16.0°C · 25 mm rain
- Stellenbosch in DecemberSouth Africa · 303 kmHigh 26.9°C · Low 15.7°C · 24 mm rain
- Kariega in DecemberSouth Africa · 304 kmHigh 25.4°C · Low 16.7°C · 45 mm rain
- Somerset West in DecemberSouth Africa · 306 kmHigh 25.6°C · Low 17.2°C · 24 mm rain
- Motherwell in DecemberSouth Africa · 320 kmHigh 24.7°C · Low 17.2°C · 45 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 Mossel Bay) is explained once on the Mossel Bay year overview and on the Sources, method and limits page.