No
you don't need a jacket based on the weather in St. Catharines, ON, Canada 10 minutes ago
73°F23°C & Clear
Wind is 10 mph16 km/h from the Northeast, gusting to 16 mph25 km/h
| September 15 | ||||
| 7pm | 70°F21°C | 8 mph13 km/h Northeast | Clear | |
| 8pm | 67°F19°C | 6 mph10 km/h Northeast | Clear | |
| 9pm | 64°F18°C | 6 mph9 km/h East | Clear | |
| 10pm | 62°F17°C | 5 mph9 km/h East | Clear | |
| 11pm | 61°F16°C | 5 mph8 km/h East | Clear | |
| September 16 | ||||
| 12am | 59°F15°C | 5 mph8 km/h East | Clear | |
| 1am | 60°F16°C | 5 mph8 km/h East | Clear | |
| 2am | 59°F15°C | 4 mph7 km/h East | Clear | |
| 3am | 59°F15°C | 4 mph7 km/h East | Clear | |
| 4am | 58°F15°C | 5 mph7 km/h East | Clear | |
| 5am | 58°F14°C | 5 mph7 km/h East | Clear | |
| 6am | 58°F14°C | 5 mph8 km/h East | Clear | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| September 15 | 54°F12°C | 77°F25°C | 6 mph10 km/h from Northeast | Mostly Clear | Clear |
| September 16 | 58°F14°C | 75°F24°C | 8 mph12 km/h from Northeast | Mostly Clear | Clear |
| September 17 | 60°F16°C | 75°F24°C | 4 mph6 km/h from North | Mostly Clear | Mostly Clear |
| September 18 | 60°F16°C | 78°F25°C | 5 mph8 km/h from West | Mostly Clear | Mostly Clear |
| September 19 | 58°F15°C | 69°F20°C | 9 mph14 km/h from Northeast | Mostly Clear | Clear |
| September 20 | 53°F11°C | 71°F22°C | 9 mph15 km/h from East | Mostly Clear | Partly Cloudy |
| September 21 | 58°F14°C | 78°F25°C | 10 mph15 km/h from South | Partly Cloudy | Partly Cloudy |
Yes
Low of 58°F15°C, High of 75°F24°CWind: 8 mph12 km/h
Precipitation: None