Yes

you do need a jacket based on the weather in Canandaigua, NY 14424, USA 1 second ago

Why? Because it's bitterly cold.
40°F5°C & Cloudy

Wind is 9 mph15 km/h from the N, gusting to 19 mph31 km/h
April 24
4pm41°F5°C10 mph15 km/h NCloudy
5pm42°F5°C9 mph15 km/h NMostly Cloudy
6pm43°F6°C9 mph14 km/h NPartly Cloudy
7pm42°F5°C8 mph12 km/h NMostly Clear
8pm39°F4°C5 mph8 km/h NClear
9pm36°F2°C4 mph6 km/h NClear
10pm34°F1°C3 mph6 km/h NClear
11pm33°F1°C3 mph6 km/h NClear
April 25
12am32°F0°C4 mph6 km/h NClear
1am31°F-0°C4 mph6 km/h NEClear
2am30°F-1°C3 mph6 km/h NEClear
3am30°F-1°C3 mph5 km/h NEClear
DateLowHighWindDayNight
April 2432°F0°C50°F10°C10 mph16 km/h from NWDrizzleClear
April 2528°F-2°C50°F10°C5 mph8 km/h from NEClearClear
April 2629°F-2°C62°F17°C6 mph9 km/h from SEClearPartly Cloudy
April 2743°F6°C54°F12°C14 mph23 km/h from SDrizzleDrizzle
April 2852°F11°C74°F23°C8 mph13 km/h from SWDrizzleMostly Cloudy
April 2960°F15°C80°F27°C6 mph9 km/h from WMostly CloudyPartly Cloudy
April 3056°F13°C73°F23°C9 mph14 km/h from WMostly CloudyMostly Cloudy

Yes

Low of 28°F-3°C, High of 49°F10°C
Wind: 5 mph8 km/h
Precipitation: None

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