No

you don't need a jacket based on the weather in Paris, France 3 minutes ago

65°F19°C & Mostly Clear

Wind is 7 mph11 km/h from the Northeast, gusting to 15 mph24 km/h

Date	Low	High	Wind	Day	Night
July 2	61°F16°C	78°F25°C	8 mph12 km/h from North	Clear	Clear
July 3	57°F14°C	80°F27°C	5 mph8 km/h from North	Mostly Clear	Partly Cloudy
July 4	59°F15°C	80°F27°C	5 mph8 km/h from West	Mostly Cloudy	Cloudy
July 5	60°F16°C	72°F22°C	9 mph15 km/h from West	Drizzle	Drizzle
July 6	58°F14°C	68°F20°C	12 mph20 km/h from Northwest	Drizzle	Drizzle
July 7	54°F12°C	72°F22°C	8 mph13 km/h from Northwest	Partly Cloudy	Clear
July 8	55°F13°C	78°F25°C	4 mph7 km/h from West	Mostly Clear	Mostly Clear

Low of 57°F14°C, High of 80°F27°C
Wind: 5 mph8 km/h
Precipitation: None