Yes
you do need a jacket based on the weather in Cornwall, ON, Canada 1 second ago
Why? Because it's quite chilly!
44°F7°C & Clear
Wind is 1 mph2 km/h from the North, gusting to 3 mph5 km/h
| September 12 | ||||
| 5am | 44°F7°C | 2 mph3 km/h Northwest | Clear | |
| 6am | 43°F6°C | 2 mph3 km/h North | Clear | |
| 7am | 43°F6°C | 2 mph4 km/h Northeast | Clear | |
| 8am | 47°F9°C | 2 mph3 km/h East | Clear | |
| 9am | 53°F12°C | 3 mph5 km/h East | Mostly Clear | |
| 10am | 58°F14°C | 3 mph5 km/h East | Clear | |
| 11am | 62°F16°C | 2 mph4 km/h Northeast | Partly Cloudy | |
| 12pm | 65°F18°C | 2 mph4 km/h Northeast | Partly Cloudy | |
| 1pm | 68°F20°C | 3 mph4 km/h Northeast | Partly Cloudy | |
| 2pm | 69°F21°C | 2 mph3 km/h Northeast | Partly Cloudy | |
| 3pm | 70°F21°C | 2 mph3 km/h Northwest | Partly Cloudy | |
| 4pm | 70°F21°C | 2 mph3 km/h West | Partly Cloudy | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| September 12 | 43°F6°C | 70°F21°C | 2 mph4 km/h from Northeast | Partly Cloudy | Mostly Cloudy |
| September 13 | 52°F11°C | 71°F22°C | 5 mph8 km/h from Southwest | Mostly Cloudy | Partly Cloudy |
| September 14 | 55°F13°C | 75°F24°C | 5 mph7 km/h from Northwest | Partly Cloudy | Mostly Clear |
| September 15 | 51°F10°C | 73°F23°C | 4 mph6 km/h from Northeast | Mostly Clear | Mostly Clear |
| September 16 | 50°F10°C | 77°F25°C | 2 mph3 km/h from Northeast | Mostly Clear | Clear |
| September 17 | 52°F11°C | 79°F26°C | 1 mph2 km/h from Southwest | Mostly Clear | Mostly Clear |
| September 18 | 57°F14°C | 79°F26°C | 5 mph8 km/h from Southwest | Partly Cloudy | Partly Cloudy |
Yes
Low of 52°F11°C, High of 71°F22°CWind: 5 mph8 km/h
Precipitation: None