Yes

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

Why? Because the rain is just enough to ruin your hairstyle but not your mood and the cold's there, but it's just a reminder, not an invasion!
50°F10°C & Rain

Wind is 6 mph10 km/h from the East, gusting to 15 mph24 km/h
October 12
8pm50°F10°C5 mph9 km/h EastRain
9pm51°F11°C3 mph4 km/h NortheastDrizzle
10pm52°F11°C5 mph7 km/h NorthwestCloudy
11pm52°F11°C5 mph8 km/h NorthwestCloudy
October 13
12am51°F11°C5 mph9 km/h WestCloudy
1am51°F10°C5 mph8 km/h NorthwestCloudy
2am50°F10°C6 mph10 km/h NorthwestMostly Cloudy
3am48°F9°C5 mph8 km/h NorthMostly Cloudy
4am47°F8°C5 mph8 km/h NorthMostly Cloudy
5am46°F8°C6 mph9 km/h NorthPartly Cloudy
6am45°F7°C6 mph10 km/h NorthMostly Clear
7am45°F7°C7 mph11 km/h NorthMostly Clear
DateLowHighWindDayNight
October 1245°F7°C52°F11°C5 mph7 km/h from NortheastRainMostly Clear
October 1340°F4°C58°F14°C6 mph9 km/h from NorthClearClear
October 1440°F5°C58°F14°C4 mph6 km/h from NorthwestClearClear
October 1543°F6°C58°F14°C3 mph4 km/h from SouthClearClear
October 1645°F7°C54°F12°C5 mph8 km/h from EastMostly CloudyPartly Cloudy
October 1746°F8°C55°F13°C3 mph5 km/h from WestPartly CloudyRain
October 1848°F9°C53°F12°C6 mph9 km/h from EastRainRain

Yes

Low of 40°F5°C, High of 58°F15°C
Wind: 6 mph9 km/h
Precipitation: None

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