No
you don't need a jacket based on the weather in New Tecumseth (Alliston), Ontario, Canada 1 second ago
65°F18°C & Clear
Wind is 4 mph6 km/h from the Southeast, gusting to 6 mph9 km/h
| May 11 | ||||
| 4pm | 65°F18°C | 4 mph7 km/h Southeast | Clear | |
| 5pm | 65°F18°C | 5 mph9 km/h South | Clear | |
| 6pm | 64°F18°C | 10 mph16 km/h South | Clear | |
| 7pm | 61°F16°C | 10 mph16 km/h South | Clear | |
| 8pm | 57°F14°C | 8 mph13 km/h South | Clear | |
| 9pm | 52°F11°C | 6 mph9 km/h South | Clear | |
| 10pm | 49°F9°C | 5 mph8 km/h South | Clear | |
| 11pm | 46°F8°C | 5 mph9 km/h South | Clear | |
| May 12 | ||||
| 12am | 45°F7°C | 5 mph9 km/h South | Clear | |
| 1am | 44°F7°C | 5 mph7 km/h South | Clear | |
| 2am | 43°F6°C | 5 mph7 km/h South | Clear | |
| 3am | 42°F6°C | 4 mph7 km/h South | Clear | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| May 11 | 36°F2°C | 65°F19°C | 6 mph10 km/h from Southeast | Clear | Clear |
| May 12 | 41°F5°C | 80°F27°C | 4 mph7 km/h from South | Mostly Clear | Mostly Cloudy |
| May 13 | 52°F11°C | 70°F21°C | 9 mph15 km/h from Southeast | Drizzle | Drizzle |
| May 14 | 57°F14°C | 69°F20°C | 10 mph16 km/h from Southeast | Drizzle | Mostly Cloudy |
| May 15 | 56°F14°C | 74°F23°C | 8 mph13 km/h from South | Drizzle | Partly Cloudy |
| May 16 | 58°F14°C | 77°F25°C | 11 mph18 km/h from Southwest | Drizzle | Partly Cloudy |
| May 17 | 53°F11°C | 70°F21°C | 11 mph17 km/h from Southwest | Rain | Partly Cloudy |
Yes
Low of 40°F5°C, High of 80°F27°CWind: 4 mph7 km/h
Precipitation: None