Yes

you do need a jacket based on the weather in Sauble Beach, ON N0H, Canada 1 second ago

Why? Because it's quite chilly.
45°F7°C & Haze

Wind is 8 mph13 km/h from the W, gusting to 16 mph25 km/h
April 19
11am44°F7°C9 mph15 km/h WDrizzle
12pm44°F7°C11 mph18 km/h WCloudy
1pm46°F8°C14 mph22 km/h WMostly Cloudy
2pm47°F8°C14 mph22 km/h WMostly Cloudy
3pm46°F8°C13 mph20 km/h WMostly Cloudy
4pm46°F8°C11 mph18 km/h WPartly Cloudy
5pm45°F7°C11 mph17 km/h WMostly Clear
6pm44°F7°C10 mph16 km/h WPartly Cloudy
7pm42°F6°C8 mph14 km/h NWPartly Cloudy
8pm41°F5°C8 mph12 km/h WPartly Cloudy
9pm40°F5°C7 mph11 km/h WPartly Cloudy
10pm40°F4°C9 mph14 km/h WPartly Cloudy
DateLowHighWindDayNight
April 1939°F4°C47°F8°C10 mph16 km/h from WRainMostly Cloudy
April 2035°F2°C42°F5°C16 mph25 km/h from WWindyPartly Cloudy
April 2134°F1°C46°F8°C16 mph26 km/h from WWindyClear
April 2231°F-0°C49°F10°C8 mph13 km/h from SWMostly ClearMostly Cloudy
April 2335°F2°C49°F10°C16 mph26 km/h from SWRainFreezingrain
April 2428°F-2°C35°F2°C15 mph24 km/h from NPartly CloudyMostly Clear
April 2531°F-1°C45°F7°C9 mph15 km/h from NWMostly ClearMostly Clear

Yes

Low of 36°F2°C, High of 42°F6°C
Wind: 16 mph25 km/h
Precipitation: None

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