average temperature in may johannesburg
Winter in Johannesburg. Johannesburg's winters fall between June and August, and this is the driest time of year. Daytime average temperatures range between 16 and 19Â°C but nights are chilly at only 4 or 5Â°C.Cold fronts bring strong winds at times, but the skies are usually clear and sunny.utumn is one of the most popular times to visit Johannesburg as there are fewer crowds and less rain, but the mild temperatures persist. Average daily highs in March are around 23Â°C, falling to 18Â°C in May, but nights will begin to get chilly as autumn persists and by May overnight lows of 7Â°C will fee shivery.