Yes

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

Why? Because this drizzle is just a polite way of saying, “Get ready, the big stuff's coming.”!
75°F24°C & Drizzle

Wind is 9 mph14 km/h from the West, gusting to 19 mph30 km/h
July 24
10pm74°F24°C8 mph13 km/h WestThunderstorms
11pm73°F23°C7 mph11 km/h WestPartly Cloudy
July 25
12am72°F22°C6 mph10 km/h WestMostly Cloudy
1am72°F22°C9 mph15 km/h WestThunderstorms
2am71°F21°C6 mph10 km/h NorthwestMostly Cloudy
3am70°F21°C6 mph10 km/h WestCloudy
4am70°F21°C6 mph10 km/h WestCloudy
5am69°F21°C7 mph11 km/h WestMostly Cloudy
6am69°F21°C6 mph10 km/h WestCloudy
7am69°F21°C6 mph10 km/h NorthwestCloudy
8am70°F21°C7 mph11 km/h NorthwestMostly Cloudy
9am72°F22°C7 mph12 km/h NorthwestCloudy
DateLowHighWindDayNight
July 2462°F17°C91°F33°C10 mph16 km/h from SouthwestPartly CloudyThunderstorms
July 2569°F21°C83°F28°C7 mph11 km/h from NorthwestMostly CloudyMostly Cloudy
July 2665°F18°C81°F27°C7 mph11 km/h from SoutheastDrizzleDrizzle
July 2769°F20°C87°F30°C5 mph9 km/h from NorthwestPartly CloudyMostly Clear
July 2866°F19°C88°F31°C8 mph14 km/h from SouthwestPartly CloudyMostly Clear
July 2968°F20°C84°F29°C8 mph13 km/h from NorthwestPartly CloudyPartly Cloudy
July 3061°F16°C79°F26°C10 mph17 km/h from NorthwestPartly CloudyPartly Cloudy

No

Low of 69°F21°C, High of 83°F29°C
Wind: 7 mph11 km/h
Precipitation: 18% rain

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