No
you don't need a jacket based on the weather in Sarnia, ON, Canada 1 second ago
73°F23°C & Mostly Cloudy
Wind is 5 mph8 km/h from the Southwest, gusting to 12 mph20 km/h
| July 13 | ||||
| 2am | 73°F23°C | 6 mph9 km/h Southwest | Cloudy | |
| 3am | 72°F22°C | 5 mph7 km/h Southwest | Mostly Cloudy | |
| 4am | 72°F22°C | 4 mph6 km/h Southwest | Drizzle | |
| 5am | 72°F22°C | 4 mph7 km/h West | Mostly Cloudy | |
| 6am | 71°F22°C | 4 mph7 km/h West | Partly Cloudy | |
| 7am | 72°F22°C | 4 mph7 km/h Southwest | Partly Cloudy | |
| 8am | 74°F23°C | 5 mph8 km/h West | Clear | |
| 9am | 75°F24°C | 5 mph8 km/h West | Mostly Clear | |
| 10am | 77°F25°C | 4 mph6 km/h West | Mostly Clear | |
| 11am | 79°F26°C | 4 mph7 km/h West | Mostly Clear | |
| 12pm | 81°F27°C | 5 mph7 km/h West | Mostly Clear | |
| 1pm | 82°F28°C | 5 mph8 km/h West | Partly Cloudy | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| July 13 | 71°F22°C | 84°F29°C | 5 mph8 km/h from West | Mostly Clear | Partly Cloudy |
| July 14 | 66°F19°C | 83°F29°C | 4 mph7 km/h from Northwest | Clear | Clear |
| July 15 | 65°F18°C | 87°F30°C | 4 mph6 km/h from South | Mostly Clear | Partly Cloudy |
| July 16 | 71°F21°C | 84°F29°C | 7 mph12 km/h from South | Drizzle | Thunderstorms |
| July 17 | 68°F20°C | 82°F28°C | 10 mph16 km/h from West | Thunderstorms | Drizzle |
| July 18 | 64°F18°C | 73°F23°C | 8 mph13 km/h from North | Partly Cloudy | Partly Cloudy |
| July 19 | 62°F17°C | 76°F25°C | 5 mph9 km/h from Northeast | Partly Cloudy | Partly Cloudy |
No
Low of 66°F19°C, High of 83°F29°CWind: 4 mph7 km/h
Precipitation: None