Yes

you do need a jacket based on the weather in Vancouver, BC, Canada 1 second ago

Why? Because it's not very warm out.
51°F11°C & Clear

Wind is 2 mph3 km/h from the NE, gusting to 4 mph7 km/h
April 27
1am51°F10°C3 mph4 km/h EPartly Cloudy
2am49°F10°C3 mph5 km/h EMostly Cloudy
3am49°F9°C3 mph5 km/h EMostly Cloudy
4am49°F9°C4 mph6 km/h EMostly Cloudy
5am48°F9°C4 mph7 km/h ECloudy
6am48°F9°C5 mph7 km/h ECloudy
7am48°F9°C5 mph8 km/h EDrizzle
8am47°F8°C5 mph8 km/h EDrizzle
9am47°F8°C6 mph9 km/h SERain
10am47°F9°C6 mph10 km/h SERain
11am48°F9°C7 mph11 km/h SERain
12pm49°F9°C7 mph11 km/h SERain
DateLowHighWindDayNight
April 2646°F8°C57°F14°C3 mph6 km/h from SEDrizzleRain
April 2747°F8°C50°F10°C6 mph10 km/h from SERainRain
April 2842°F5°C51°F10°C6 mph10 km/h from SRainRain
April 2938°F3°C53°F11°C5 mph9 km/h from SWDrizzleDrizzle
April 3040°F4°C54°F12°C4 mph7 km/h from SWMostly CloudyMostly Clear
May 141°F5°C56°F13°C5 mph8 km/h from SMostly CloudyDrizzle
May 244°F7°C56°F14°C4 mph6 km/h from WDrizzlePartly Cloudy

Yes

Low of 46°F8°C, High of 51°F11°C
Wind: 6 mph10 km/h
Precipitation: 84% rain

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