Yes

you do need a jacket based on the weather in Lucerne, Switzerland 1 second ago

Why? Because sound's like a thunderstorm is brewing!
67°F19°C & Thunderstorms

Wind is 3 mph5 km/h from the Northwest, gusting to 8 mph13 km/h
July 3
10pm67°F19°C3 mph5 km/h NorthwestDrizzle
11pm66°F19°C3 mph4 km/h NorthwestRain
July 4
12am66°F19°C3 mph5 km/h NorthwestRain
1am66°F19°C3 mph5 km/h NorthwestDrizzle
2am67°F19°C3 mph5 km/h NorthwestRain
3am68°F20°C3 mph5 km/h NorthwestRain
4am69°F21°C3 mph4 km/h NorthwestMostly Cloudy
5am71°F22°C3 mph5 km/h NorthMostly Cloudy
6am72°F22°C3 mph4 km/h NorthMostly Cloudy
7am74°F24°C3 mph5 km/h NortheastPartly Cloudy
8am77°F25°C3 mph5 km/h NortheastPartly Cloudy
9am78°F26°C3 mph5 km/h NortheastMostly Clear
DateLowHighWindDayNight
July 366°F19°C79°F26°C3 mph5 km/h from NorthRainMostly Clear
July 462°F17°C83°F28°C3 mph5 km/h from NortheastClearMostly Clear
July 561°F16°C76°F24°C4 mph7 km/h from WestMostly CloudyRain
July 656°F14°C68°F20°C7 mph11 km/h from WestRainRain
July 754°F12°C64°F18°C5 mph8 km/h from WestRainDrizzle
July 851°F11°C71°F22°C3 mph5 km/h from NorthMostly ClearClear
July 955°F13°C77°F25°C3 mph5 km/h from NortheastClearClear

No

Low of 63°F17°C, High of 83°F29°C
Wind: 3 mph5 km/h
Precipitation: 10% rain

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