The most comfortable time to visit Johannesburg is from mid August to May. For walking, go from late March to early October. Sunbathing weather is not what it offers.
When to go five ratings · thirty-six ten-day sections · click a cell to read it
Johannesburg never quite rates Good for sun. It comes closest in early February, at 54, mostly because it is too cool. Avoid May to August for this: it falls to 0, mostly because it is too cool. The clearest skies come in June, when the sky is typically 27% covered at midday (mostly clear).
The being outside season here runs from mid August to May. It peaks in late March, at 85. The weakest stretch is from late June to early July, when it drops to 28, mostly because it is too cold.
For walking, go from late March to early October. It peaks in late May, at 85. Avoid early and mid February for this: it falls to 29, mostly because it is too warm.
The year, measured
The average temperature in Johannesburg over the whole year is 18°C. January is the hottest month, with highs of about 25°C; July is the coldest, with lows of about 5°C. The rainy (wet) season in Johannesburg runs from October to May, peaking in December with a 56% chance of rain on a given day. The dry season is June to September; August is the driest month, at 26%. Winds in Johannesburg are highest in October, averaging 2.9 m/s (10 km/h), and lightest in April, at 1.9 m/s (7 km/h). The prevailing wind is from the NW. The clearest skies in Johannesburg come in July, when the sky is typically 25% covered; February is the cloudiest month, at 58%.
Month by month Johannesburg climate by month: average temperatures year round · click a month to read it
| Month | High | Low | Feels like | Chance of rain | Cloud | Wind | Being outside | Sun | Walking |
|---|---|---|---|---|---|---|---|---|---|
| January | 25°C | 17°C | 24°C | 53% | 55% | 2.6 m/s | 76 | 48 | 34 |
| February | 25°C | 17°C | 25°C | 52% | 58% | 2.3 m/s | 74 | 51 | 31 |
| March | 24°C | 16°C | 23°C | 53% | 49% | 2.1 m/s | 81 | 39 | 43 |
| April | 22°C | 13°C | 20°C | 49% | 46% | 1.9 m/s | 83 | 13 | 69 |
| May | 19°C | 9°C | 17°C | 50% | 33% | 1.9 m/s | 69 | 1 | 83 |
| June | 17°C | 5°C | 13°C | 36% | 25% | 2.1 m/s | 37 | 0 | 82 |
| July | 17°C | 5°C | 13°C | 31% | 25% | 2.0 m/s | 35 | 0 | 81 |
| August | 20°C | 8°C | 15°C | 26% | 27% | 2.5 m/s | 59 | 0 | 82 |
| September | 23°C | 12°C | 19°C | 40% | 38% | 2.7 m/s | 79 | 13 | 67 |
| October | 24°C | 14°C | 21°C | 52% | 48% | 2.9 m/s | 73 | 28 | 53 |
| November | 25°C | 16°C | 22°C | 53% | 51% | 2.9 m/s | 74 | 35 | 47 |
| December | 25°C | 18°C | 24°C | 56% | 58% | 2.8 m/s | 73 | 45 | 37 |
High and low are the warmest and coolest of four readings a day — midnight, 6am, noon and 6pm — so a true overnight low can sit a degree or two under them. Chance of rain, cloud and wind are the day’s average; feels-like and the three ratings (each out of 100: Good from 55, Ideal from 80) are read at midday.
Seasons, and the year in short Johannesburg weather by season
Year round, Johannesburg has days of about 17°C at their warmest in July, its coolest month, and 25°C in January, its warmest; the coolest hours of the day run from 5°C to 18°C through the year, and the average temperature over the year is 18°C around the clock. Rain is most likely around December and least likely around August. Every figure here is a decade of observations blended into one representative year, so it reads as what this date is usually like, not a forecast for one particular day.
Johannesburg weather in winterJune to August
Winter in Johannesburg has typical daily highs of about 18°C and lows of about 6°C, with a 31% chance of rain on a given day.
Johannesburg weather in springSeptember to November
Spring in Johannesburg has typical daily highs of about 24°C and lows of about 14°C, with a 48% chance of rain on a given day.
Johannesburg weather in summerDecember to February
Summer in Johannesburg has typical daily highs of about 25°C and lows of about 17°C, with a 54% chance of rain on a given day.
Johannesburg weather in autumnMarch to May
Autumn in Johannesburg has typical daily highs of about 22°C and lows of about 12°C, with a 51% chance of rain on a given day.
When is the rainy season in Johannesburg?
The rainy (wet) season in Johannesburg runs from October to May, peaking in December with a 56% chance of rain on a given day. The dry season is June to September; August is the driest month, at 26%.
What time of year is Johannesburg windiest?
Winds in Johannesburg are highest in October, averaging 2.9 m/s (10 km/h), and lightest in April, at 1.9 m/s (7 km/h). The prevailing wind is from the NW.
What is the average temperature in Johannesburg year round?
The average temperature in Johannesburg over the whole year is 18°C. January is the hottest month, with highs of about 25°C; July is the coldest, with lows of about 5°C.
Where to go instead in late June, the weakest time here for being outside
How this is worked out
Every figure is a decade of weather-station observations blended into one typical year, in ten-day sections. The ratings, the chart and the feels-like column are read at midday local solar time. Being outside is the Easy outdoors rating, Sun is Sunbathing and Walking is Active outdoors, each out of 100: Good from 55, Ideal from 80. They describe what a time of year is usually like here, not a forecast. The dotted links open the map at that time of year; set its time of day to midday to see these numbers.