Yes

you do need a jacket based on the weather in Ottawa (Barrhaven), Ontario, Canada 1 second ago

Why? Because too cold for just a hoodie, too warm for a parka!
48°F9°C & Clear

Wind is 4 mph7 km/h from the North, gusting to 9 mph14 km/h
June 15
4am48°F9°C4 mph7 km/h NorthClear
5am47°F9°C4 mph7 km/h NorthClear
6am48°F9°C4 mph6 km/h NortheastClear
7am52°F11°C4 mph7 km/h NortheastClear
8am57°F14°C5 mph8 km/h NortheastClear
9am61°F16°C4 mph7 km/h NortheastMostly Clear
10am65°F18°C4 mph6 km/h NortheastMostly Clear
11am68°F20°C4 mph6 km/h NortheastMostly Clear
12pm70°F21°C4 mph7 km/h NortheastPartly Cloudy
1pm72°F22°C4 mph7 km/h NortheastPartly Cloudy
2pm74°F23°C4 mph6 km/h NortheastClear
3pm75°F24°C3 mph5 km/h NortheastClear
DateLowHighWindDayNight
June 1547°F9°C75°F24°C4 mph6 km/h from NortheastMostly ClearClear
June 1651°F11°C79°F26°C4 mph6 km/h from SouthPartly CloudyMostly Clear
June 1760°F16°C78°F26°C10 mph16 km/h from SouthMostly CloudyMostly Cloudy
June 1865°F19°C82°F28°C7 mph12 km/h from WestDrizzleRain
June 1965°F18°C76°F24°C7 mph11 km/h from NorthwestRainRain
June 2058°F15°C75°F24°C7 mph12 km/h from NorthwestMostly ClearPartly Cloudy
June 2159°F15°C81°F27°C7 mph11 km/h from SouthMostly CloudyThunderstorms

Yes

Low of 51°F11°C, High of 79°F26°C
Wind: 4 mph6 km/h
Precipitation: None

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