Yes

you do need a jacket based on the weather in Niagara Falls, NY, USA 1 second ago

Why? Because it's cool enough your breath is visible, but your nose isn’t red yet and it's on the windy side!
41°F5°C & Cloudy

Wind is 11 mph17 km/h from the Northwest, gusting to 20 mph32 km/h
March 17
1am39°F4°C11 mph18 km/h NorthwestCloudy
2am37°F3°C11 mph18 km/h NorthwestCloudy
3am35°F2°C9 mph15 km/h NorthwestCloudy
4am34°F1°C9 mph14 km/h NorthwestCloudy
5am33°F1°C8 mph14 km/h NorthwestCloudy
6am33°F1°C8 mph13 km/h NorthwestCloudy
7am32°F0°C8 mph13 km/h NorthwestCloudy
8am31°F-0°C9 mph14 km/h NorthwestCloudy
9am31°F-1°C10 mph16 km/h NorthwestCloudy
10am31°F-1°C11 mph18 km/h NorthwestMostly Cloudy
11am32°F-0°C11 mph18 km/h NorthwestMostly Cloudy
12pm33°F1°C10 mph17 km/h NorthwestMostly Cloudy
DateLowHighWindDayNight
March 1731°F-1°C42°F5°C9 mph14 km/h from NorthwestPartly CloudyMostly Clear
March 1831°F-1°C54°F12°C11 mph18 km/h from SouthwestMostly ClearMostly Cloudy
March 1943°F6°C66°F19°C11 mph17 km/h from SouthMostly CloudyDrizzle
March 2032°F-0°C56°F14°C19 mph30 km/h from SouthwestDrizzlePartly Cloudy
March 2128°F-2°C43°F6°C9 mph15 km/h from WestMostly ClearPartly Cloudy
March 2234°F1°C47°F8°C10 mph16 km/h from SouthwestCloudyMostly Cloudy
March 2331°F-1°C42°F5°C5 mph8 km/h from NorthPartly CloudyMostly Cloudy

Yes

Low of 30°F-1°C, High of 55°F13°C
Wind: 11 mph18 km/h
Precipitation: None

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