Yes
you do need a jacket based on the weather in Ottawa (Barrhaven), Ontario, Canada 1 second ago
Why? Because it's not very warm out!
55°F13°C & Clear
Wind is 4 mph7 km/h from the Southwest, gusting to 9 mph15 km/h
| September 18 | ||||
| 5am | 55°F13°C | 5 mph7 km/h Southwest | Clear | |
| 6am | 55°F13°C | 4 mph7 km/h Southwest | Clear | |
| 7am | 54°F12°C | 5 mph7 km/h Southwest | Clear | |
| 8am | 57°F14°C | 4 mph7 km/h Southwest | Clear | |
| 9am | 62°F17°C | 5 mph9 km/h Southwest | Clear | |
| 10am | 67°F20°C | 6 mph9 km/h West | Clear | |
| 11am | 72°F22°C | 7 mph11 km/h West | Clear | |
| 12pm | 75°F24°C | 9 mph14 km/h West | Mostly Clear | |
| 1pm | 76°F24°C | 10 mph16 km/h West | Mostly Cloudy | |
| 2pm | 75°F24°C | 11 mph18 km/h Northwest | Mostly Cloudy | |
| 3pm | 74°F24°C | 11 mph17 km/h Northwest | Mostly Cloudy | |
| 4pm | 75°F24°C | 10 mph16 km/h Northwest | Partly Cloudy | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| September 18 | 54°F12°C | 76°F24°C | 8 mph13 km/h from West | Mostly Clear | Mostly Clear |
| September 19 | 48°F9°C | 66°F19°C | 8 mph13 km/h from Northwest | Clear | Clear |
| September 20 | 41°F5°C | 65°F19°C | 3 mph5 km/h from North | Clear | Clear |
| September 21 | 41°F5°C | 74°F23°C | 6 mph9 km/h from Southeast | Partly Cloudy | Drizzle |
| September 22 | 56°F14°C | 73°F23°C | 8 mph12 km/h from South | Rain | Rain |
| September 23 | 59°F15°C | 73°F23°C | 6 mph9 km/h from Northwest | Mostly Cloudy | Partly Cloudy |
| September 24 | 56°F14°C | 71°F22°C | 5 mph8 km/h from North | Drizzle | Partly Cloudy |
Yes
Low of 48°F9°C, High of 66°F19°CWind: 8 mph13 km/h
Precipitation: None