Yes

you do need a jacket based on the weather in Buenos Aires, Argentina 16 minutes ago

Why? Because it's not very warm out and it's on the windy side!
53°F12°C & Partly Cloudy

Wind is 10 mph16 km/h from the Northeast, gusting to 21 mph33 km/h
July 24
11pm53°F12°C11 mph17 km/h NortheastPartly Cloudy
July 25
12am53°F12°C11 mph18 km/h NortheastMostly Cloudy
1am52°F11°C11 mph18 km/h NortheastMostly Cloudy
2am52°F11°C12 mph19 km/h NortheastCloudy
3am52°F11°C11 mph18 km/h NorthCloudy
4am51°F11°C9 mph14 km/h NorthCloudy
5am51°F10°C6 mph10 km/h NorthRain
6am51°F11°C6 mph10 km/h NorthDrizzle
7am51°F11°C6 mph10 km/h NorthDrizzle
8am52°F11°C5 mph8 km/h NorthDrizzle
9am53°F12°C5 mph8 km/h NorthDrizzle
10am55°F13°C5 mph8 km/h NorthCloudy
DateLowHighWindDayNight
July 2348°F9°C57°F14°C7 mph11 km/h from NortheastPartly CloudyRain
July 2451°F10°C60°F15°C4 mph7 km/h from NorthwestDrizzleMostly Cloudy
July 2544°F7°C53°F12°C12 mph19 km/h from SoutheastCloudyCloudy
July 2645°F7°C56°F13°C13 mph21 km/h from SoutheastCloudyMostly Cloudy
July 2746°F8°C58°F14°C9 mph14 km/h from EastMostly CloudyMostly Clear
July 2847°F8°C60°F15°C6 mph10 km/h from NortheastMostly ClearPartly Cloudy
July 2951°F10°C63°F17°C10 mph16 km/h from NortheastMostly ClearDrizzle

Yes

Low of 51°F11°C, High of 60°F16°C
Wind: 4 mph7 km/h
Precipitation: 67% rain

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