Yes
you do need a jacket based on the weather in Sarnia, ON, Canada 1 second ago
Why? Because it's cold enough to freeze the brass off a bald monkey and the wind is offering free, unsolicited face massages!
27°F-3°C & Partly Cloudy
Wind is 9 mph15 km/h from the East, gusting to 20 mph32 km/h
| December 14 | ||||
| 12pm | 28°F-2°C | 10 mph16 km/h Southeast | Mostly Cloudy | |
| 1pm | 30°F-1°C | 10 mph16 km/h Southeast | Mostly Cloudy | |
| 2pm | 32°F0°C | 10 mph17 km/h Southeast | Mostly Cloudy | |
| 3pm | 33°F0°C | 10 mph16 km/h Southeast | Mostly Cloudy | |
| 4pm | 32°F-0°C | 10 mph16 km/h East | Partly Cloudy | |
| 5pm | 29°F-1°C | 9 mph15 km/h East | Mostly Clear | |
| 6pm | 28°F-2°C | 9 mph15 km/h East | Mostly Clear | |
| 7pm | 27°F-3°C | 11 mph18 km/h East | Partly Cloudy | |
| 8pm | 26°F-3°C | 12 mph19 km/h East | Mostly Cloudy | |
| 9pm | 27°F-3°C | 12 mph19 km/h Southeast | Mostly Cloudy | |
| 10pm | 27°F-3°C | 12 mph19 km/h Southeast | Cloudy | |
| 11pm | 28°F-2°C | 12 mph19 km/h Southeast | Cloudy | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| December 14 | 11°F-12°C | 33°F0°C | 9 mph15 km/h from East | Partly Cloudy | Cloudy |
| December 15 | 29°F-2°C | 38°F4°C | 13 mph20 km/h from Southeast | Drizzle | Cloudy |
| December 16 | 36°F2°C | 48°F9°C | 14 mph22 km/h from South | Rain | Drizzle |
| December 17 | 33°F0°C | 41°F5°C | 12 mph20 km/h from West | Mostly Cloudy | Cloudy |
| December 18 | 30°F-1°C | 36°F2°C | 6 mph9 km/h from Northwest | Drizzle | Mostly Cloudy |
| December 19 | 22°F-5°C | 31°F-1°C | 11 mph17 km/h from Northwest | Mostly Cloudy | Snow |
| December 20 | 25°F-4°C | 34°F1°C | 16 mph26 km/h from Southwest | Windy | Windy |
Yes
Low of 29°F-2°C, High of 38°F4°CWind: 13 mph20 km/h
Precipitation: 51% rain