Yes

you do need a jacket based on the weather in Montevideo, Montevideo Department, Uruguay 1 second ago

Why? Because the cold's there, but it's just a reminder, not an invasion!
39°F4°C & Clear

Wind is 5 mph8 km/h from the North, gusting to 8 mph13 km/h
June 28
2am39°F4°C5 mph9 km/h NorthClear
3am39°F4°C5 mph8 km/h NorthClear
4am38°F4°C5 mph8 km/h NortheastMostly Clear
5am38°F4°C5 mph7 km/h NortheastMostly Clear
6am39°F4°C5 mph7 km/h NortheastMostly Clear
7am40°F4°C5 mph7 km/h EastPartly Cloudy
8am42°F6°C5 mph8 km/h EastMostly Clear
9am46°F8°C6 mph9 km/h EastMostly Clear
10am51°F10°C7 mph11 km/h EastMostly Clear
11am54°F12°C8 mph14 km/h SoutheastMostly Clear
12pm55°F13°C10 mph16 km/h SoutheastClear
1pm55°F13°C12 mph19 km/h SoutheastMostly Clear
DateLowHighWindDayNight
June 2738°F4°C55°F13°C10 mph16 km/h from EastMostly ClearWindy
June 2841°F5°C50°F10°C12 mph20 km/h from SouthDrizzleRain
June 2939°F4°C47°F8°C14 mph23 km/h from SouthwestPartly CloudyPartly Cloudy
June 3040°F4°C48°F9°C10 mph17 km/h from SouthwestMostly ClearMostly Clear
July 138°F3°C51°F11°C4 mph7 km/h from SouthwestClearMostly Clear
July 237°F3°C57°F14°C9 mph15 km/h from NorthPartly CloudyMostly Cloudy
July 347°F8°C60°F16°C10 mph17 km/h from NorthMostly CloudyMostly Cloudy

Yes

Low of 41°F5°C, High of 50°F10°C
Wind: 12 mph20 km/h
Precipitation: 60% rain

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