- Clothing
- Warm jacket and comfortable layers recommended.
Tomorrow's Weather Forecast - Johannesburg
Tomorrow's weather in Johannesburg. high 21°C (70°F), low 12°C (54°F). Sunny.
Tomorrow’s Outlook
Tomorrow brings a similar temperature to today. Mild conditions with dry weather expected all day. Humidity sits at a moderate 55%, so the air shouldn't feel unusually damp or dry. Winds stay light and calm, rarely topping 11 km/h. Sunrise is at 6:08 AM and sunset at 5:59 PM, for about 11h 51m of daylight.
- Tomorrow
- 21°/ 12°
- Today22° / 10°
Tomorrow’s Hourly Weather Outlook
Morning6 AM – Noon15°
- Rain probability
- 0%
- Wind speed
- 11 km/h
AfternoonNoon – 6 PM21°
- Rain probability
- 0%
- Wind speed
- 10 km/h
Evening6 PM – Midn16°
- Rain probability
- 0%
- Wind speed
- 7 km/h
NightMidn – 6 AM13°
- Rain probability
- 0%
- Wind speed
- 10 km/h
24-Hour Rain & Temperature Forecast
Tomorrow12 Sep
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Planning Advice for Tomorrow
- Outdoor
- Good conditions for outdoor activities.
- Travel
- Standard travel conditions expected.
Sunrise & Sunset
Sunrise
Dawn 5:38 AMTotal Daylight
Full day forecastSolar noon 12:04 PM
Sunset
Dusk 6:29 PMvs today+1 min daylight
Sunrise shift1 min earlier
Sunset shiftSame time
5-Day Weather Forecast
Full 15-Day ForecastWeather Insight
Johannesburg is forecast to reach a high of 21°C tomorrow, with an overnight low around 12°C. That's 5° below the long-term average high of 26°C for this time of year. Expect little chance of rain (0% probability) and a gentle breeze averaging 11 km/h. Air quality is currently Unhealthy for Sensitive Groups (AQI 120), driven mainly by O₃ at 189 μg/m³.
Today vs Normal
22°C-4° below normal
The long-term average high for today is 26°C.
16 of the last 28 days with published data ran above normal.
That's a break from the pattern - today's forecast runs below normal even though the recent stretch mostly ran above.
Red = above normal, blue = at or below · last 12 days
Air Quality
Air Quality
Unhealthy for Sensitive Groups
Health effects can be felt by sensitive groups, including children, older adults, and people with respiratory or heart conditions. The general public is less likely to be affected.