Climate averages 1991–2020
Ermelo weather
in May.
A mild, fairly dry month: the 10th warmest and the 4th driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
May is a mild month in Ermelo: daytime highs average 18.5°C and nights cool to about 6.3°C. By daytime temperature it is the 10th warmest of the 12 months.
Expect about 15 mm of rain on roughly 3 days, which makes May a fairly dry month (the 4th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 10 h 50 min on an average May day.
The nearest other city in this atlas is Bethal (52 km away). In May its highs average 19.0°C, 0.5°C warmer than Ermelo, with 15 mm of rain.
Among the 95 cities listed in South Africa, Ermelo ranks joint 90th of 95 for the warmest May highs and joint 12th of 95 for the driest May (rainfall, lowest first). The mean May high of those 95 cities is 21.0°C; Ermelo is 2.5°C cooler than that mean.
From May to June, average highs fall by 2.2°C to 16.3°C, and monthly rainfall falls from 15 mm to 6.8 mm.
The annual picture
May 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, selected | 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 | 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
May in nearby cities
- Bethal in MaySouth Africa · 52 kmHigh 19.0°C · Low 5.9°C · 15 mm rain
- Standerton in MaySouth Africa · 86 kmHigh 19.5°C · Low 6.0°C · 15 mm rain
- eMbalenhle in MaySouth Africa · 91 kmHigh 19.6°C · Low 6.5°C · 15 mm rain
- Piet Retief in MaySouth Africa · 98 kmHigh 20.2°C · Low 8.5°C · 18 mm rain
- Middelburg in MaySouth Africa · 99 kmHigh 20.3°C · Low 7.6°C · 15 mm rain
- Emalahleni in MaySouth Africa · 105 kmHigh 19.4°C · Low 6.3°C · 16 mm rain
- Mbabane in MayEswatini · 117 kmHigh 20.4°C · Low 9.5°C · 32 mm rain
- Newcastle, South Africa in MaySouth Africa · 136 kmHigh 20.7°C · Low 7.4°C · 17 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.