Yes

you do need a jacket based on the weather in Hamilton, ON, Canada 3 minutes ago

Why? Because it's so windy, even the squirrels are holding onto branches for dear life!
74°F23°C & Cloudy

Wind is 10 mph16 km/h from the Southwest, gusting to 19 mph31 km/h
September 22
1pm74°F24°C11 mph18 km/h SouthwestCloudy
2pm75°F24°C11 mph17 km/h SouthwestCloudy
3pm76°F24°C11 mph17 km/h SouthwestCloudy
4pm75°F24°C10 mph17 km/h SouthwestCloudy
5pm75°F24°C10 mph15 km/h SouthwestMostly Cloudy
6pm73°F23°C8 mph13 km/h SouthwestCloudy
7pm72°F22°C7 mph11 km/h SouthwestCloudy
8pm70°F21°C6 mph10 km/h SouthwestCloudy
9pm69°F20°C6 mph10 km/h SouthwestDrizzle
10pm68°F20°C6 mph10 km/h SouthwestCloudy
11pm67°F19°C7 mph11 km/h SouthwestCloudy
September 23
12am67°F19°C7 mph11 km/h SouthwestCloudy
DateLowHighWindDayNight
September 2264°F18°C76°F24°C9 mph14 km/h from SouthwestThunderstormsDrizzle
September 2364°F18°C74°F23°C4 mph6 km/h from EastDrizzleDrizzle
September 2464°F18°C71°F22°C7 mph11 km/h from NortheastDrizzleHeavy Rain
September 2563°F17°C71°F22°C7 mph12 km/h from SouthwestRainDrizzle
September 2660°F16°C73°F23°C7 mph11 km/h from WestPartly CloudyClear
September 2759°F15°C74°F23°C11 mph18 km/h from SouthwestPartly CloudyMostly Clear
September 2858°F14°C72°F22°C8 mph13 km/h from WestMostly ClearMostly Clear

No

Low of 64°F18°C, High of 74°F24°C
Wind: 4 mph6 km/h
Precipitation: 38% rain

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