Yes

you do need a jacket based on the weather in Cusco, Peru 1 second ago

Why? Because it's bitterly cold.
49°F10°C & Cloudy

Wind is 3 mph5 km/h from the NE, gusting to 6 mph10 km/h
April 25
10pm49°F9°C3 mph5 km/h NEMostly Cloudy
11pm47°F8°C3 mph5 km/h NEMostly Cloudy
April 26
12am45°F7°C3 mph4 km/h NEMostly Cloudy
1am44°F7°C2 mph4 km/h NEMostly Cloudy
2am43°F6°C2 mph3 km/h NECloudy
3am42°F6°C2 mph3 km/h ECloudy
4am41°F5°C1 mph2 km/h ECloudy
5am41°F5°C1 mph2 km/h ECloudy
6am40°F4°C1 mph2 km/h ECloudy
7am39°F4°C1 mph2 km/h SECloudy
8am41°F5°C1 mph2 km/h SEMostly Cloudy
9am48°F9°C1 mph2 km/h SEMostly Cloudy
DateLowHighWindDayNight
April 2542°F6°C69°F20°C5 mph8 km/h from NEMostly CloudyMostly Cloudy
April 2639°F4°C69°F20°C3 mph5 km/h from NEPartly CloudyPartly Cloudy
April 2739°F4°C69°F20°C3 mph5 km/h from NEPartly CloudyPartly Cloudy
April 2840°F4°C68°F20°C4 mph6 km/h from NMostly ClearPartly Cloudy
April 2940°F4°C67°F19°C4 mph6 km/h from NPartly CloudyPartly Cloudy
April 3041°F5°C67°F20°C4 mph6 km/h from NPartly CloudyMostly Cloudy
May 140°F5°C68°F20°C3 mph5 km/h from NPartly CloudyMostly Cloudy

Yes

Low of 39°F4°C, High of 69°F21°C
Wind: 3 mph5 km/h
Precipitation: 16% rain

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