Climate in Johannesburg — Annual Weather Overview
Johannesburg has a oceanic climate — mild temperatures year-round with regular rainfall. The hottest month is October (average high 25.7°C) and the coolest is June (16.6°C). There is a noticeable seasonal temperature shift of 9.1°C between October and June. Annual rainfall totals around 723mm. December is the wettest month at 146.0mm, while July averages just 1.0mm. Average daily sunshine is 10.5 hours.
**Spring (September, October, November):** average highs 25.2°C, 159mm rain. **Summer (December, January, February):** average highs 24.7°C, 399mm rain. **Autumn (March, April, May):** average highs 21.3°C, 148mm rain. **Winter (June, July, August):** average highs 17.8°C, 17mm rain.
Johannesburg — Monthly Temperatures
Johannesburg — Monthly Rainfall
✅ Best months to visit
All year
ℹ️ No months to avoid
Weather in Johannesburg stays reasonable all year.
Johannesburg weather by month
| Month | High | Low | Rain | Sun/day | Rainy days | Rating |
|---|---|---|---|---|---|---|
| January | 25.1°C | 14.5°C | 123.3mm | 11.1h | 15 | 9/10 |
| February | 24.3°C | 14.2°C | 129.4mm | 10.5h | 15 | 9/10 |
| March | 23.4°C | 12.7°C | 48.0mm | 10.4h | 9 | 10/10 |
| April | 21.4°C | 10.1°C | 78.5mm | 10.1h | 6 | 10/10 |
| May | 19.0°C | 6.9°C | 21.2mm | 9.9h | 3 | 10/10 |
| June | 16.6°C | 4.1°C | 12.4mm | 9.8h | 2 | 10/10 |
| July | 16.8°C | 3.5°C | 1.0mm | 10.2h | 0 | 10/10 |
| August | 20.0°C | 6.0°C | 3.8mm | 10.6h | 1 | 10/10 |
| September | 24.8°C | 10.0°C | 9.1mm | 11.3h | 2 | 10/10 |
| October | 25.7°C | 12.3°C | 50.8mm | 10.6h | 8 | 10/10 |
| November | 25.0°C | 13.4°C | 99.5mm | 10.9h | 14 | 10/10 |
| December | 24.6°C | 14.1°C | 146.0mm | 11.0h | 19 | 9/10 |
For the full verdict on when to go, see the best time to visit Johannesburg. Seasonal breakdowns: spring, summer, autumn and winter.
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Frequently Asked Questions
What type of climate does Johannesburg have?
Johannesburg has a oceanic climate — mild temperatures year-round with regular rainfall. Average highs range from 16.6°C in June to 25.7°C in October.
What is the hottest month in Johannesburg?
October is the hottest month in Johannesburg, with average highs of 25.7°C and lows of 12.3°C.
What is the coldest month in Johannesburg?
June is the coolest month, with average highs of 16.6°C and lows of 3.5°C.
What is the wettest month in Johannesburg?
December is the wettest month, averaging 146.0mm of rainfall over around 19 rainy days.
How much rain does Johannesburg get per year?
Johannesburg receives around 723mm of rain per year. The driest month is July (1.0mm).
When is the best time to visit Johannesburg?
The best time to visit Johannesburg is All year. See the full month-by-month guide →
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Climate data sourced from Open-Meteo (open source, open data licence). Monthly averages calculated from 2020–2023 historical data. Weather can be unpredictable — always check a live forecast before travelling.