Yes

you do need a jacket based on the weather in Richmond Hill, ON L4C 1E3, Canada 1 second ago

Why? Because it's quite chilly.
38°F3°C & Mostly Cloudy

Wind is 4 mph6 km/h from the SW, gusting to 9 mph15 km/h
April 20
3am38°F3°C4 mph7 km/h SWMostly Cloudy
4am38°F3°C5 mph8 km/h SWMostly Cloudy
5am37°F3°C5 mph8 km/h WMostly Cloudy
6am37°F3°C5 mph7 km/h WMostly Cloudy
7am37°F3°C6 mph9 km/h WMostly Cloudy
8am39°F4°C7 mph12 km/h WMostly Cloudy
9am40°F4°C11 mph17 km/h NWPartly Cloudy
10am41°F5°C13 mph20 km/h WMostly Cloudy
11am42°F5°C14 mph22 km/h WCloudy
12pm42°F6°C13 mph21 km/h WCloudy
1pm44°F6°C15 mph24 km/h WCloudy
2pm45°F7°C14 mph23 km/h WCloudy
DateLowHighWindDayNight
April 2036°F2°C46°F8°C13 mph20 km/h from WMostly CloudyPartly Cloudy
April 2132°F0°C51°F10°C13 mph20 km/h from WMostly CloudyMostly Clear
April 2229°F-1°C52°F11°C6 mph10 km/h from WMostly ClearPartly Cloudy
April 2339°F4°C58°F14°C14 mph23 km/h from SWDrizzleDrizzle
April 2435°F2°C49°F9°C13 mph21 km/h from NWRainMostly Clear
April 2529°F-2°C50°F10°C6 mph9 km/h from NWClearClear
April 2632°F-0°C55°F13°C7 mph12 km/h from SEMostly ClearMostly Cloudy

Yes

Low of 32°F0°C, High of 51°F11°C
Wind: 13 mph20 km/h
Precipitation: None

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