Yes
you do need a jacket based on the weather in Brockville, ON, Canada 1 second ago
Why? Because it's not very warm out!
57°F14°C & Mostly Clear
Wind is 2 mph4 km/h from the Southwest, gusting to 4 mph6 km/h
| September 11 | ||||
| 1am | 55°F13°C | 3 mph5 km/h South | Mostly Clear | |
| 2am | 54°F12°C | 3 mph5 km/h South | Partly Cloudy | |
| 3am | 54°F12°C | 3 mph5 km/h Southwest | Partly Cloudy | |
| 4am | 53°F12°C | 3 mph4 km/h Southwest | Partly Cloudy | |
| 5am | 53°F12°C | 2 mph4 km/h Southwest | Partly Cloudy | |
| 6am | 52°F11°C | 2 mph4 km/h West | Partly Cloudy | |
| 7am | 53°F11°C | 2 mph3 km/h West | Mostly Clear | |
| 8am | 56°F13°C | 2 mph4 km/h Northwest | Mostly Clear | |
| 9am | 61°F16°C | 4 mph6 km/h North | Mostly Clear | |
| 10am | 65°F18°C | 5 mph7 km/h North | Mostly Clear | |
| 11am | 69°F21°C | 5 mph8 km/h North | Mostly Clear | |
| 12pm | 72°F22°C | 6 mph10 km/h North | Mostly Clear | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| September 11 | 52°F11°C | 74°F23°C | 6 mph9 km/h from North | Mostly Clear | Clear |
| September 12 | 49°F9°C | 71°F22°C | 3 mph4 km/h from North | Mostly Clear | Mostly Cloudy |
| September 13 | 53°F12°C | 71°F22°C | 5 mph9 km/h from Southwest | Mostly Cloudy | Rain |
| September 14 | 56°F13°C | 70°F21°C | 5 mph9 km/h from North | Drizzle | Partly Cloudy |
| September 15 | 54°F12°C | 72°F22°C | 6 mph10 km/h from Northeast | Mostly Clear | Mostly Clear |
| September 16 | 53°F11°C | 76°F24°C | 3 mph5 km/h from Northeast | Mostly Clear | Mostly Clear |
| September 17 | 58°F14°C | 78°F25°C | 5 mph7 km/h from South | Mostly Clear | Partly Cloudy |
Yes
Low of 48°F9°C, High of 71°F22°CWind: 3 mph4 km/h
Precipitation: None