Yes

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

Why? Because a little drizzle out and it's cool enough your breath is visible, but your nose isn’t red yet and it's super windy outside!
49°F10°C & Drizzle

Wind is 16 mph25 km/h from the Northeast, gusting to 30 mph49 km/h
October 30
11pm49°F10°C16 mph26 km/h NortheastRain
October 31
12am48°F9°C19 mph30 km/h NortheastRain
1am47°F9°C18 mph29 km/h NorthRain
2am47°F8°C19 mph30 km/h NorthRain
3am46°F8°C18 mph28 km/h NorthDrizzle
4am45°F7°C17 mph27 km/h NorthDrizzle
5am45°F7°C15 mph25 km/h NorthRain
6am45°F7°C14 mph23 km/h NorthDrizzle
7am45°F7°C14 mph23 km/h NorthwestDrizzle
8am44°F7°C15 mph24 km/h NorthwestDrizzle
9am44°F7°C16 mph25 km/h NorthwestRain
10am44°F6°C16 mph26 km/h NorthwestDrizzle
DateLowHighWindDayNight
October 3044°F6°C49°F10°C13 mph20 km/h from NortheastHeavy RainRain
October 3144°F6°C50°F10°C20 mph33 km/h from NorthwestRainWindy
November 141°F5°C49°F10°C10 mph17 km/h from WestMostly CloudyMostly Cloudy
November 238°F3°C52°F11°C3 mph5 km/h from SouthwestPartly CloudyPartly Cloudy
November 341°F5°C51°F11°C16 mph26 km/h from SouthwestRainWindy
November 441°F5°C52°F11°C17 mph27 km/h from WestWindyPartly Cloudy
November 541°F5°C53°F11°C12 mph20 km/h from SouthwestDrizzleDrizzle

Yes

Low of 44°F7°C, High of 50°F10°C
Wind: 20 mph33 km/h
Precipitation: 89% rain

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