No
you don't need a jacket based on the weather in St Thomas, ON, Canada 9 minutes ago
66°F19°C & Cloudy
Wind is 6 mph9 km/h from the Northwest, gusting to 17 mph27 km/h
| September 3 | ||||
| 11pm | 65°F18°C | 4 mph7 km/h Northwest | Cloudy | |
| September 4 | ||||
| 12am | 63°F17°C | 4 mph7 km/h Southeast | Cloudy | |
| 1am | 62°F17°C | 3 mph6 km/h South | Cloudy | |
| 2am | 62°F16°C | 4 mph7 km/h South | Drizzle | |
| 3am | 61°F16°C | 5 mph9 km/h Southwest | Drizzle | |
| 4am | 61°F16°C | 7 mph11 km/h West | Rain | |
| 5am | 60°F16°C | 7 mph11 km/h West | Rain | |
| 6am | 59°F15°C | 6 mph9 km/h West | Rain | |
| 7am | 59°F15°C | 11 mph17 km/h Northwest | Rain | |
| 8am | 58°F14°C | 12 mph19 km/h Northwest | Rain | |
| 9am | 57°F14°C | 12 mph19 km/h Northwest | Rain | |
| 10am | 58°F14°C | 12 mph19 km/h Northwest | Drizzle | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| September 3 | 51°F10°C | 78°F25°C | 10 mph17 km/h from South | Mostly Clear | Thunderstorms |
| September 4 | 54°F12°C | 66°F19°C | 11 mph18 km/h from Northwest | Rain | Mostly Clear |
| September 5 | 50°F10°C | 71°F22°C | 20 mph32 km/h from Southwest | Windy | Partly Cloudy |
| September 6 | 48°F9°C | 66°F19°C | 10 mph16 km/h from West | Partly Cloudy | Mostly Clear |
| September 7 | 46°F8°C | 63°F17°C | 9 mph15 km/h from Northwest | Drizzle | Mostly Clear |
| September 8 | 43°F6°C | 64°F18°C | 8 mph12 km/h from West | Mostly Clear | Clear |
| September 9 | 41°F5°C | 68°F20°C | 6 mph10 km/h from South | Mostly Clear | Mostly Clear |
Yes
Low of 54°F12°C, High of 65°F19°CWind: 11 mph18 km/h
Precipitation: 83% rain