Yes

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

Why? Because there's a refreshing nip in the air.
46°F8°C & Mostly Clear

Wind is 11 mph18 km/h from the W, gusting to 20 mph32 km/h
March 28
5pm46°F8°C12 mph19 km/h WMostly Clear
6pm44°F7°C11 mph17 km/h WClear
7pm42°F5°C9 mph14 km/h WClear
8pm38°F3°C6 mph10 km/h WClear
9pm35°F2°C5 mph8 km/h WMostly Clear
10pm33°F1°C4 mph7 km/h NWMostly Clear
11pm32°F0°C4 mph7 km/h NWMostly Clear
March 29
12am31°F-0°C4 mph7 km/h NWMostly Clear
1am31°F-1°C4 mph7 km/h NWClear
2am30°F-1°C5 mph8 km/h NWClear
3am29°F-2°C6 mph9 km/h NWClear
4am29°F-2°C6 mph9 km/h NWMostly Clear
DateLowHighWindDayNight
March 2828°F-2°C46°F8°C10 mph16 km/h from SWMostly ClearMostly Clear
March 2927°F-3°C42°F5°C10 mph17 km/h from NWPartly CloudyMostly Clear
March 3027°F-3°C47°F9°C3 mph4 km/h from SEMostly CloudyCloudy
March 3131°F-1°C46°F8°C7 mph12 km/h from NWMostly CloudyCloudy
April 130°F-1°C49°F10°C6 mph10 km/h from EMostly CloudyRain
April 235°F1°C41°F5°C12 mph19 km/h from NERainSnow
April 331°F-1°C37°F3°C14 mph23 km/h from NSnowSnow

Yes

Low of 27°F-3°C, High of 42°F6°C
Wind: 10 mph17 km/h
Precipitation: None

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