Climate averages 1991–2020
Mossel Bay weather
in September.
A mild, fairly dry month: the 9th warmest and the 2nd driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
September is a mild month in Mossel Bay: daytime highs average 19.3°C and nights cool to about 11.2°C. By daytime temperature it is the 9th warmest of the 12 months.
Expect about 33 mm of rain on roughly 7 days, which makes September a fairly dry month (the 2nd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 51 min on an average September day.
The nearest other city in this atlas is George (38 km away). In September its highs average 18.1°C, 1.2°C cooler than Mossel Bay, with 44 mm of rain.
Among the 95 cities listed in South Africa, Mossel Bay ranks 89th of 95 for the warmest September highs and joint 66th of 95 for the driest September (rainfall, lowest first). The mean September high of those 95 cities is 24.3°C; Mossel Bay is 5.0°C cooler than that mean.
From September to October, average highs rise by 1.2°C to 20.5°C, and monthly rainfall rises from 33 mm to 43 mm.
The annual picture
September 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, selected | 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 | 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
September in nearby cities
- George in SeptemberSouth Africa · 38 kmHigh 18.1°C · Low 10.3°C · 44 mm rain
- Oudtshoorn in SeptemberSouth Africa · 65 kmHigh 22.2°C · Low 8.3°C · 27 mm rain
- Worcester, South Africa in SeptemberSouth Africa · 256 kmHigh 19.9°C · Low 9.8°C · 35 mm rain
- Paarl in SeptemberSouth Africa · 297 kmHigh 19.9°C · Low 9.1°C · 77 mm rain
- Stellenbosch in SeptemberSouth Africa · 303 kmHigh 19.0°C · Low 9.4°C · 68 mm rain
- Kariega in SeptemberSouth Africa · 304 kmHigh 21.5°C · Low 11.2°C · 31 mm rain
- Somerset West in SeptemberSouth Africa · 306 kmHigh 19.0°C · Low 11.4°C · 68 mm rain
- Motherwell in SeptemberSouth Africa · 320 kmHigh 21.0°C · Low 11.6°C · 31 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.