Yes

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

Why? Because it's cool. Pleasantly cool, but cool and it's so windy, your hat will probably launch into orbit!
56°F13°C & Windy

Wind is 16 mph25 km/h from the West, gusting to 29 mph46 km/h
November 5
6pm56°F13°C15 mph25 km/h WestWindy
7pm56°F13°C16 mph26 km/h WestWindy
8pm52°F11°C20 mph32 km/h NorthwestWindy
9pm50°F10°C20 mph32 km/h NorthwestWindy
10pm47°F8°C19 mph31 km/h NorthwestRain
11pm46°F8°C17 mph27 km/h NorthwestDrizzle
November 6
12am45°F7°C17 mph27 km/h NorthwestRain
1am44°F7°C17 mph28 km/h NorthwestWindy
2am43°F6°C16 mph26 km/h NorthwestWindy
3am42°F5°C16 mph25 km/h NorthwestWindy
4am41°F5°C15 mph25 km/h NorthwestWindy
5am40°F4°C14 mph23 km/h NorthwestPartly Cloudy
DateLowHighWindDayNight
November 540°F4°C57°F14°C14 mph22 km/h from WestRainRain
November 637°F3°C47°F8°C9 mph14 km/h from WestPartly CloudyMostly Cloudy
November 740°F4°C53°F12°C14 mph22 km/h from SouthwestRainMostly Cloudy
November 838°F3°C47°F8°C6 mph9 km/h from NorthwestCloudyRain
November 928°F-2°C42°F5°C13 mph20 km/h from NorthRainSnow
November 1025°F-4°C32°F0°C12 mph19 km/h from NorthwestSnowMostly Cloudy
November 1127°F-3°C38°F3°C14 mph23 km/h from WestMostly CloudyCloudy

Yes

Low of 37°F3°C, High of 47°F9°C
Wind: 9 mph14 km/h
Precipitation: None

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