Yes

you do need a jacket based on the weather in Paris, France 1 second ago

Why? Because it's cool. Pleasantly cool, but cool.
52°F11°C & Cloudy

Wind is 12 mph19 km/h from the W, gusting to 25 mph41 km/h
April 19
6am53°F12°C13 mph20 km/h WCloudy
7am54°F12°C13 mph22 km/h WCloudy
8am55°F13°C14 mph22 km/h WCloudy
9am56°F13°C13 mph21 km/h WCloudy
10am56°F13°C14 mph22 km/h NWDrizzle
11am55°F13°C13 mph21 km/h NWMostly Cloudy
12pm55°F13°C13 mph20 km/h NWMostly Cloudy
1pm54°F12°C11 mph18 km/h NWPartly Cloudy
2pm53°F11°C10 mph16 km/h NWMostly Cloudy
3pm51°F11°C8 mph14 km/h NPartly Cloudy
4pm49°F10°C7 mph12 km/h NMostly Cloudy
5pm47°F9°C7 mph11 km/h NPartly Cloudy
DateLowHighWindDayNight
April 1844°F7°C56°F14°C12 mph19 km/h from WDrizzlePartly Cloudy
April 1939°F4°C52°F11°C10 mph16 km/h from NMostly CloudyPartly Cloudy
April 2038°F3°C54°F12°C10 mph16 km/h from NPartly CloudyMostly Clear
April 2138°F3°C53°F12°C10 mph16 km/h from NPartly CloudyMostly Cloudy
April 2237°F3°C52°F11°C10 mph16 km/h from NEPartly CloudyMostly Clear
April 2338°F3°C55°F13°C9 mph15 km/h from NMostly CloudyMostly Cloudy
April 2439°F4°C53°F12°C6 mph10 km/h from NMostly CloudyPartly Cloudy

Yes

Low of 39°F4°C, High of 53°F12°C
Wind: 10 mph16 km/h
Precipitation: None

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