Climate averages 1991–2020
Johannesburg weather
in June.
A mild, very dry month: the coolest and the 2nd driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
June is a mild month in Johannesburg: daytime highs average 16.1°C and nights cool to about 2.9°C. By daytime temperature it is the coolest month of the year.
Expect about 7.8 mm of rain on roughly 1 day, which makes June a very dry month (the 2nd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 10 h 32 min on an average June day.
The nearest other city in this atlas is Alberton (11 km away). In June its highs average 17.3°C, 1.2°C warmer than Johannesburg, with 7.8 mm of rain.
Among the 95 cities listed in South Africa, Johannesburg ranks 91st of 95 for the warmest June highs and joint 32nd of 95 for the driest June (rainfall, lowest first). The mean June high of those 95 cities is 18.5°C; Johannesburg is 2.5°C cooler than that mean.
From June to July, average highs rise by 0.2°C to 16.3°C, and monthly rainfall falls from 7.8 mm to 3.0 mm.
The annual picture
June 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
Johannesburg climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 24.3°C14.1°C | 14.1°C | 132 | 16.4 | 13.614 h |
| February | 24.1°C13.9°C | 13.9°C | 111 | 14.1 | 13.013 h |
| March | 22.8°C12.3°C | 12.3°C | 89 | 12.7 | 12.312 h |
| April | 20.4°C9.3°C | 9.3°C | 45 | 7.3 | 11.511 h |
| May | 18.4°C5.7°C | 5.7°C | 17 | 2.9 | 10.911 h |
| June, selected | 16.1°C2.9°C | 2.9°C | 7.8 | 1.3 | 10.511 h |
| July | 16.3°C2.2°C | 2.2°C | 3.0 | 0.8 | 10.711 h |
| August | 19.4°C4.9°C | 4.9°C | 9.8 | 2.0 | 11.211 h |
| September | 23.4°C8.5°C | 8.5°C | 22 | 3.7 | 11.912 h |
| October | 24.4°C10.9°C | 10.9°C | 75 | 10.7 | 12.713 h |
| November | 24.1°C12.3°C | 12.3°C | 100 | 14.0 | 13.413 h |
| December | 24.3°C13.7°C | 13.7°C | 138 | 18.0 | 13.714 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
June in nearby cities
- Alberton in JuneSouth Africa · 11 kmHigh 17.3°C · Low 3.8°C · 7.8 mm rain
- Germiston in JuneSouth Africa · 12 kmHigh 17.1°C · Low 3.6°C · 7.6 mm rain
- Randburg in JuneSouth Africa · 13 kmHigh 17.2°C · Low 3.7°C · 6.5 mm rain
- Roodepoort in JuneSouth Africa · 18 kmHigh 16.3°C · Low 3.0°C · 8.1 mm rain
- Tokoza in JuneSouth Africa · 19 kmHigh 17.4°C · Low 3.7°C · 7.6 mm rain
- Soweto in JuneSouth Africa · 20 kmHigh 16.7°C · Low 3.7°C · 8.1 mm rain
- Midrand in JuneSouth Africa · 26 kmHigh 17.1°C · Low 3.7°C · 6.5 mm rain
- Benoni in JuneSouth Africa · 28 kmHigh 17.1°C · Low 3.4°C · 7.6 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 Johannesburg) is explained once on the Johannesburg year overview and on the Sources, method and limits page.
Alberton lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.