Yes

you do need a jacket based on the weather in Caledonia, ON, Canada 1 second ago

Why? Because it's cold. simple as that.
50°F10°C & Windy

Wind is 16 mph25 km/h from the SW, gusting to 34 mph54 km/h
April 23
9am50°F10°C16 mph26 km/h SWWindy
10am53°F12°C19 mph30 km/h SWWindy
11am56°F13°C20 mph32 km/h SWWindy
12pm58°F14°C21 mph34 km/h SWWindy
1pm59°F15°C21 mph33 km/h SWWindy
2pm61°F16°C22 mph35 km/h SWWindy
3pm60°F15°C22 mph35 km/h SWWindy
4pm58°F14°C22 mph35 km/h SWWindy
5pm56°F13°C22 mph35 km/h SWWindy
6pm53°F11°C20 mph32 km/h SWRain
7pm51°F11°C16 mph26 km/h SWRain
8pm50°F10°C14 mph23 km/h SWRain
DateLowHighWindDayNight
April 2342°F5°C61°F16°C19 mph31 km/h from SWRainRain
April 2433°F1°C49°F10°C11 mph18 km/h from NPartly CloudyClear
April 2530°F-1°C51°F11°C7 mph11 km/h from EClearClear
April 2631°F-1°C61°F16°C9 mph15 km/h from EClearRain
April 2748°F9°C64°F18°C14 mph22 km/h from SRainCloudy
April 2855°F13°C71°F21°C14 mph23 km/h from SWMostly CloudyCloudy
April 2951°F10°C75°F24°C12 mph20 km/h from SWMostly CloudyPartly Cloudy

Yes

Low of 33°F1°C, High of 49°F10°C
Wind: 11 mph18 km/h
Precipitation: None

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