Yes

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

Why? Because it's bitterly cold.
37°F3°C & Mostly Cloudy

Wind is 6 mph9 km/h from the SW, gusting to 10 mph16 km/h
February 22
7am36°F2°C5 mph7 km/h SWCloudy
8am36°F2°C4 mph7 km/h WMostly Cloudy
9am38°F3°C4 mph6 km/h WCloudy
10am41°F5°C3 mph5 km/h WCloudy
11am44°F7°C3 mph5 km/h SWCloudy
12pm47°F8°C3 mph5 km/h SWCloudy
1pm48°F9°C3 mph5 km/h SWCloudy
2pm49°F9°C3 mph5 km/h WCloudy
3pm49°F10°C3 mph5 km/h NCloudy
4pm49°F9°C3 mph5 km/h NWCloudy
5pm47°F8°C3 mph5 km/h ECloudy
6pm44°F7°C3 mph6 km/h ECloudy
DateLowHighWindDayNight
February 2234°F1°C49°F10°C3 mph5 km/h from WCloudyPartly Cloudy
February 2316°F-9°C39°F4°C13 mph21 km/h from NWMostly CloudyPartly Cloudy
February 249°F-13°C25°F-4°C8 mph13 km/h from NWMostly ClearMostly Clear
February 2517°F-9°C36°F2°C16 mph26 km/h from SWWindyMostly Cloudy
February 2626°F-3°C45°F7°C7 mph11 km/h from SEMostly CloudyMostly Cloudy
February 2734°F1°C54°F12°C13 mph20 km/h from SRainRain
February 2851°F11°C58°F15°C17 mph28 km/h from SWDrizzleRain

Yes

Low of 16°F-9°C, High of 39°F4°C
Wind: 13 mph21 km/h
Precipitation: None

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