Get the monthly weather forecast for Johannesburg, Gauteng, South Africa, including daily high/low, historical averages, to help you plan ahead. Get your weather updates for Johannesburg as seen on our Detailed Bulletin on People°s Weather DStv Channel 180. Today Johannesburg Gauteng South Africa: Partly cloudy with a temperature of 13°C and a wind North-North-East speed of 22 Km/h. Scroll right to see more Conditions Comfort Precipitation Sun; Day Temperature Weather Feels Like Wind Humidity ... Apr 21: 73 / 56 °F: Cloudy. 2 Week Extended Forecast in Johannesburg, South Africa. JavaScript is turned off in your web browser. 30DayWeather Long Range Weather Forecasts predict ideal conditions for a storm. Weather Today/Tomorrow Hour-by-Hour Forecast 14 Day Forecast Yesterday/Past Weather Climate (Averages) ... See weather overview. Weather Johannesburg, Republic of South Africa. Know what's coming with AccuWeather's extended daily forecasts for Johannesburg, Gauteng, South Africa. … Weather forecast from Be prepared with the most accurate 10-day forecast for with highs, lows, chance of precipitation from The Weather Channel and Detailed hourly weather forecast, today 04/15/: clear, 19 °C, tomorrow 04/16/: clear, 21 °C, the day after tomorrow 04/17/: cloudy, 20 °C, weather forecast for 10 days Johannesburg (from 04/18/ to 04/24/): the highest temperature over the day 13 to 23 °C, the lowest temperature at night 9 to 12 °C. Up to 90 days of daily highs, lows, and precipitation chances. The humidity will be 81% and there will be 0.0 mm of precipitation. A Risky Day is not a direct prediction of precipitation (Rain/Snow) but instead a forecast of ideal conditions for a storm to enter the region.