Yes
you do need a jacket based on the weather in Sarnia, ON, Canada 1 second ago
Why? Because it's cool. Pleasantly cool, but cool and the wind is harsh and biting!
57°F14°C & Cloudy
Wind is 9 mph15 km/h from the Southwest, gusting to 19 mph31 km/h
| October 21 | ||||
| 10pm | 52°F11°C | 10 mph16 km/h Southwest | Rain | |
| 11pm | 50°F10°C | 9 mph14 km/h Southwest | Mostly Cloudy | |
| October 22 | ||||
| 12am | 49°F9°C | 9 mph15 km/h Southwest | Cloudy | |
| 1am | 47°F8°C | 8 mph13 km/h Southwest | Cloudy | |
| 2am | 46°F8°C | 7 mph12 km/h Southwest | Cloudy | |
| 3am | 46°F8°C | 7 mph11 km/h Southwest | Cloudy | |
| 4am | 45°F7°C | 8 mph12 km/h Southwest | Cloudy | |
| 5am | 45°F7°C | 10 mph16 km/h Southwest | Cloudy | |
| 6am | 44°F7°C | 10 mph16 km/h Southwest | Cloudy | |
| 7am | 44°F7°C | 10 mph15 km/h Southwest | Partly Cloudy | |
| 8am | 43°F6°C | 9 mph15 km/h Southwest | Partly Cloudy | |
| 9am | 43°F6°C | 9 mph14 km/h Southwest | Partly Cloudy | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| October 21 | 45°F7°C | 60°F16°C | 9 mph15 km/h from Southwest | Rain | Drizzle |
| October 22 | 43°F6°C | 51°F11°C | 11 mph18 km/h from West | Drizzle | Cloudy |
| October 23 | 42°F6°C | 51°F11°C | 13 mph21 km/h from Northwest | Mostly Cloudy | Partly Cloudy |
| October 24 | 38°F4°C | 51°F11°C | 10 mph16 km/h from West | Partly Cloudy | Partly Cloudy |
| October 25 | 38°F3°C | 52°F11°C | 4 mph6 km/h from Northwest | Partly Cloudy | Partly Cloudy |
| October 26 | 38°F4°C | 53°F12°C | 6 mph10 km/h from East | Partly Cloudy | Mostly Clear |
| October 27 | 40°F5°C | 54°F12°C | 10 mph16 km/h from East | Mostly Clear | Clear |
Yes
Low of 43°F6°C, High of 51°F11°CWind: 11 mph18 km/h
Precipitation: 72% rain