No

you don't need a jacket based on the weather in Johannesburg, South Africa 9 minutes ago

70°F21°C & Partly Cloudy

Wind is 2 mph4 km/h from the North, gusting to 11 mph18 km/h
September 26
12pm68°F20°C3 mph4 km/h NorthPartly Cloudy
1pm66°F19°C3 mph5 km/h NorthwestPartly Cloudy
2pm64°F18°C2 mph3 km/h NorthwestMostly Clear
3pm62°F17°C2 mph3 km/h NorthPartly Cloudy
4pm61°F16°C2 mph2 km/h NortheastPartly Cloudy
5pm60°F16°C2 mph3 km/h NortheastPartly Cloudy
6pm59°F15°C4 mph6 km/h NortheastPartly Cloudy
7pm58°F14°C5 mph8 km/h NortheastPartly Cloudy
8pm56°F13°C6 mph10 km/h NortheastPartly Cloudy
9pm55°F13°C7 mph12 km/h NortheastPartly Cloudy
10pm54°F12°C8 mph12 km/h NortheastPartly Cloudy
11pm53°F12°C8 mph12 km/h NorthPartly Cloudy
DateLowHighWindDayNight
September 2551°F11°C74°F23°C2 mph3 km/h from NorthPartly CloudyPartly Cloudy
September 2653°F12°C71°F22°C8 mph13 km/h from NorthMostly CloudyPartly Cloudy
September 2755°F13°C73°F23°C7 mph12 km/h from NorthwestMostly CloudyDrizzle
September 2851°F10°C66°F19°C5 mph8 km/h from NorthThunderstormsRain
September 2948°F9°C64°F18°C5 mph8 km/h from NortheastMostly CloudyPartly Cloudy
September 3048°F9°C66°F19°C5 mph8 km/h from NorthMostly ClearClear
October 150°F10°C73°F23°C3 mph5 km/h from SouthwestMostly ClearClear

Yes

Low of 54°F12°C, High of 71°F22°C
Wind: 8 mph13 km/h
Precipitation: 12% rain

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