Yes

you do need a jacket based on the weather in Cape Town, South Africa 1 second ago

Why? Because the rain is just enough to ruin your hairstyle but not your mood and it's cool. Pleasantly cool, but cool and the wind is harsh and biting!
57°F14°C & Rain

Wind is 12 mph20 km/h from the Northwest, gusting to 24 mph38 km/h
June 7
1am57°F14°C12 mph19 km/h NorthwestRain
2am58°F14°C10 mph17 km/h NorthwestDrizzle
3am58°F14°C11 mph18 km/h NorthwestDrizzle
4am58°F15°C12 mph20 km/h NorthwestDrizzle
5am59°F15°C12 mph19 km/h NorthwestDrizzle
6am59°F15°C13 mph22 km/h NorthwestRain
7am60°F15°C14 mph23 km/h NorthwestRain
8am60°F15°C14 mph23 km/h NorthwestRain
9am59°F15°C14 mph22 km/h NorthwestRain
10am59°F15°C14 mph23 km/h WestRain
11am58°F15°C12 mph19 km/h WestDrizzle
12pm58°F14°C10 mph16 km/h WestDrizzle
DateLowHighWindDayNight
June 653°F12°C60°F15°C12 mph20 km/h from NorthwestRainRain
June 750°F10°C59°F15°C8 mph13 km/h from SouthDrizzleMostly Clear
June 852°F11°C62°F17°C9 mph14 km/h from SouthMostly ClearMostly Clear
June 949°F9°C63°F17°C4 mph6 km/h from SouthMostly ClearMostly Clear
June 1050°F10°C64°F18°C3 mph4 km/h from SoutheastClearClear
June 1148°F9°C68°F20°C2 mph3 km/h from EastMostly ClearPartly Cloudy
June 1251°F11°C70°F21°C3 mph6 km/h from NorthMostly ClearPartly Cloudy

Yes

Low of 50°F10°C, High of 59°F15°C
Wind: 8 mph13 km/h
Precipitation: 59% rain

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