No
you don't need a jacket based on the weather in Ottawa, ON, Canada 46 seconds ago
75°F24°C & Partly Cloudy
Wind is 9 mph15 km/h from the West, gusting to 16 mph25 km/h
| September 18 | ||||
| 2pm | 75°F24°C | 10 mph16 km/h West | Mostly Cloudy | |
| 3pm | 76°F24°C | 9 mph15 km/h West | Partly Cloudy | |
| 4pm | 75°F24°C | 10 mph16 km/h Northwest | Mostly Cloudy | |
| 5pm | 74°F23°C | 10 mph16 km/h Northwest | Partly Cloudy | |
| 6pm | 71°F22°C | 9 mph14 km/h Northwest | Mostly Cloudy | |
| 7pm | 69°F21°C | 8 mph13 km/h Northwest | Mostly Clear | |
| 8pm | 66°F19°C | 8 mph12 km/h Northwest | Mostly Clear | |
| 9pm | 63°F17°C | 9 mph14 km/h North | Mostly Clear | |
| 10pm | 61°F16°C | 8 mph13 km/h North | Mostly Clear | |
| 11pm | 59°F15°C | 8 mph13 km/h North | Mostly Clear | |
| September 19 | ||||
| 12am | 57°F14°C | 7 mph11 km/h North | Mostly Clear | |
| 1am | 56°F13°C | 6 mph10 km/h North | Clear | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| September 18 | 55°F13°C | 76°F25°C | 7 mph11 km/h from West | Partly Cloudy | Mostly Clear |
| September 19 | 49°F10°C | 65°F18°C | 7 mph12 km/h from Northwest | Clear | Clear |
| September 20 | 42°F6°C | 65°F18°C | 3 mph4 km/h from North | Clear | Clear |
| September 21 | 42°F6°C | 73°F23°C | 5 mph9 km/h from Southeast | Partly Cloudy | Rain |
| September 22 | 57°F14°C | 71°F21°C | 6 mph10 km/h from South | Rain | Drizzle |
| September 23 | 59°F15°C | 72°F22°C | 5 mph8 km/h from Northwest | Partly Cloudy | Mostly Clear |
| September 24 | 54°F12°C | 71°F22°C | 3 mph5 km/h from North | Partly Cloudy | Mostly Clear |
Yes
Low of 49°F10°C, High of 65°F19°CWind: 7 mph12 km/h
Precipitation: None