Yes
you do need a jacket based on the weather in Ottawa, ON, Canada 5 minutes ago
Why? Because just cool enough for a jacket, but not warm enough to ditch it!
56°F13°C & Clear
Wind is 4 mph6 km/h from the Southwest, gusting to 7 mph12 km/h
| September 18 | ||||
| 6am | 55°F13°C | 4 mph6 km/h Southwest | Clear | |
| 7am | 55°F13°C | 3 mph5 km/h Southwest | Clear | |
| 8am | 57°F14°C | 2 mph4 km/h Southwest | Clear | |
| 9am | 61°F16°C | 4 mph6 km/h West | Clear | |
| 10am | 66°F19°C | 5 mph8 km/h West | Clear | |
| 11am | 70°F21°C | 7 mph11 km/h West | Clear | |
| 12pm | 73°F23°C | 8 mph13 km/h West | Mostly Clear | |
| 1pm | 74°F23°C | 8 mph13 km/h West | Mostly Cloudy | |
| 2pm | 74°F23°C | 9 mph15 km/h West | Mostly Cloudy | |
| 3pm | 74°F23°C | 9 mph14 km/h Northwest | Mostly Cloudy | |
| 4pm | 75°F24°C | 9 mph14 km/h Northwest | Partly Cloudy | |
| 5pm | 73°F23°C | 9 mph15 km/h Northwest | Mostly Cloudy | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| September 18 | 55°F13°C | 75°F24°C | 7 mph11 km/h from West | Partly Cloudy | Mostly Clear |
| September 19 | 49°F10°C | 66°F19°C | 7 mph12 km/h from Northwest | Clear | Clear |
| September 20 | 42°F6°C | 64°F18°C | 3 mph4 km/h from North | Clear | Clear |
| September 21 | 43°F6°C | 73°F23°C | 5 mph8 km/h from Southeast | Partly Cloudy | Rain |
| September 22 | 56°F14°C | 72°F22°C | 6 mph10 km/h from South | Rain | Rain |
| September 23 | 60°F16°C | 72°F22°C | 5 mph9 km/h from West | Partly Cloudy | Partly Cloudy |
| September 24 | 57°F14°C | 71°F22°C | 4 mph7 km/h from North | Mostly Cloudy | Partly Cloudy |
Yes
Low of 49°F10°C, High of 65°F19°CWind: 7 mph12 km/h
Precipitation: None