Yes

you do need a jacket based on the weather in St. Catharines (Glenridge), Ontario, Canada 1 second ago

Why? Because it's not very warm out and it's windy enough to give you a brand new hairdo!
58°F14°C & Partly Cloudy

Wind is 13 mph21 km/h from the West, gusting to 24 mph39 km/h
October 20
9pm57°F14°C13 mph21 km/h WestPartly Cloudy
10pm56°F13°C11 mph18 km/h WestMostly Cloudy
11pm55°F13°C10 mph17 km/h WestPartly Cloudy
October 21
12am53°F12°C9 mph15 km/h WestMostly Clear
1am52°F11°C8 mph14 km/h WestMostly Clear
2am51°F10°C7 mph11 km/h WestMostly Clear
3am50°F10°C6 mph9 km/h WestMostly Clear
4am49°F9°C5 mph9 km/h SouthwestClear
5am48°F9°C5 mph8 km/h SouthwestClear
6am47°F8°C4 mph7 km/h SouthwestClear
7am47°F9°C5 mph8 km/h SouthwestMostly Clear
8am48°F9°C6 mph9 km/h SouthMostly Clear
DateLowHighWindDayNight
October 2049°F9°C58°F15°C14 mph22 km/h from WestDrizzleMostly Clear
October 2147°F8°C59°F15°C14 mph23 km/h from SouthwestDrizzleRain
October 2245°F7°C53°F12°C12 mph20 km/h from SouthwestRainDrizzle
October 2343°F6°C52°F11°C14 mph22 km/h from WestDrizzlePartly Cloudy
October 2441°F5°C51°F11°C10 mph17 km/h from WestMostly CloudyPartly Cloudy
October 2539°F4°C53°F12°C5 mph8 km/h from SouthwestMostly CloudyMostly Cloudy
October 2643°F6°C54°F12°C8 mph13 km/h from EastMostly CloudyPartly Cloudy

Yes

Low of 47°F9°C, High of 59°F15°C
Wind: 14 mph23 km/h
Precipitation: 47% rain

Support This Page