Climate averages 1991–2020
Ermelo weather
in September.
A warm, fairly dry month: the 5th warmest and the 5th driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
September is a warm month in Ermelo: daytime highs average 23.2°C and nights cool to about 8.8°C. By daytime temperature it is the 5th warmest of the 12 months.
Expect about 26 mm of rain on roughly 5 days, which makes September a fairly dry month (the 5th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 55 min on an average September day.
The nearest other city in this atlas is Bethal (52 km away). In September its highs average 23.9°C, 0.7°C warmer than Ermelo, with 23 mm of rain.
Among the 95 cities listed in South Africa, Ermelo ranks 72nd of 95 for the warmest September highs and 61st of 95 for the driest September (rainfall, lowest first). The mean September high of those 95 cities is 24.3°C; Ermelo is 1.1°C cooler than that mean.
From September to October, average highs rise by 0.2°C to 23.4°C, and monthly rainfall rises from 26 mm to 96 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
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, selected | 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 | 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
September in nearby cities
- Bethal in SeptemberSouth Africa · 52 kmHigh 23.9°C · Low 8.9°C · 23 mm rain
- Standerton in SeptemberSouth Africa · 86 kmHigh 24.4°C · Low 8.9°C · 23 mm rain
- eMbalenhle in SeptemberSouth Africa · 91 kmHigh 24.7°C · Low 9.5°C · 24 mm rain
- Piet Retief in SeptemberSouth Africa · 98 kmHigh 23.5°C · Low 10.1°C · 38 mm rain
- Middelburg in SeptemberSouth Africa · 99 kmHigh 25.0°C · Low 10.1°C · 18 mm rain
- Emalahleni in SeptemberSouth Africa · 105 kmHigh 24.3°C · Low 9.1°C · 20 mm rain
- Mbabane in SeptemberEswatini · 117 kmHigh 23.1°C · Low 11.0°C · 57 mm rain
- Newcastle, South Africa in SeptemberSouth Africa · 136 kmHigh 24.7°C · Low 9.7°C · 40 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.