No
you don't need a jacket based on the weather in St. Catharines, ON, Canada 1 second ago
65°F18°C & Mostly Clear
Wind is 7 mph11 km/h from the Northwest, gusting to 11 mph18 km/h
| May 7 | ||||
| 12pm | 65°F18°C | 7 mph12 km/h Northwest | Mostly Clear | |
| 1pm | 66°F19°C | 7 mph12 km/h Northwest | Mostly Clear | |
| 2pm | 67°F19°C | 6 mph9 km/h West | Partly Cloudy | |
| 3pm | 68°F20°C | 7 mph11 km/h Southwest | Partly Cloudy | |
| 4pm | 68°F20°C | 7 mph11 km/h Southwest | Mostly Clear | |
| 5pm | 69°F20°C | 6 mph9 km/h Southwest | Mostly Clear | |
| 6pm | 66°F19°C | 7 mph12 km/h Southwest | Partly Cloudy | |
| 7pm | 63°F17°C | 6 mph9 km/h Southwest | Mostly Clear | |
| 8pm | 60°F16°C | 5 mph8 km/h Northwest | Partly Cloudy | |
| 9pm | 57°F14°C | 6 mph9 km/h North | Mostly Cloudy | |
| 10pm | 54°F12°C | 7 mph11 km/h North | Mostly Cloudy | |
| 11pm | 52°F11°C | 8 mph13 km/h Northwest | Mostly Cloudy | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| May 7 | 51°F11°C | 69°F20°C | 7 mph11 km/h from West | Mostly Clear | Mostly Cloudy |
| May 8 | 45°F7°C | 56°F13°C | 9 mph15 km/h from Northeast | Partly Cloudy | Mostly Clear |
| May 9 | 41°F5°C | 59°F15°C | 6 mph10 km/h from North | Mostly Clear | Mostly Clear |
| May 10 | 43°F6°C | 65°F18°C | 8 mph12 km/h from Southwest | Mostly Clear | Clear |
| May 11 | 47°F8°C | 60°F16°C | 7 mph11 km/h from Northeast | Clear | Mostly Clear |
| May 12 | 47°F9°C | 68°F20°C | 5 mph7 km/h from Southwest | Partly Cloudy | Cloudy |
| May 13 | 54°F12°C | 64°F18°C | 4 mph6 km/h from Northeast | Mostly Cloudy | Drizzle |
Yes
Low of 46°F8°C, High of 55°F13°CWind: 9 mph15 km/h
Precipitation: 15% rain