Yes

you do need a jacket based on the weather in Ottawa, ON, Canada 5 minutes ago

Why? Because it's cold enough that makes you wish you had a hat, but you're still too proud to admit it and it's so windy, your hat has officially retired from your head!
46°F8°C & Cloudy

Wind is 11 mph18 km/h from the West, gusting to 24 mph39 km/h
June 1
9am47°F8°C13 mph20 km/h WestRain
10am48°F9°C13 mph21 km/h WestCloudy
11am49°F9°C13 mph21 km/h WestCloudy
12pm50°F10°C13 mph21 km/h WestCloudy
1pm51°F10°C12 mph20 km/h WestCloudy
2pm51°F10°C12 mph19 km/h WestCloudy
3pm52°F11°C12 mph19 km/h WestCloudy
4pm52°F11°C11 mph17 km/h WestCloudy
5pm52°F11°C10 mph16 km/h WestCloudy
6pm52°F11°C9 mph15 km/h WestCloudy
7pm51°F11°C8 mph12 km/h WestCloudy
8pm50°F10°C7 mph11 km/h WestCloudy
DateLowHighWindDayNight
June 144°F7°C52°F11°C11 mph18 km/h from WestRainMostly Cloudy
June 246°F8°C68°F20°C8 mph13 km/h from WestMostly ClearPartly Cloudy
June 351°F11°C79°F26°C8 mph13 km/h from SouthMostly ClearPartly Cloudy
June 458°F15°C84°F29°C10 mph17 km/h from SouthwestMostly ClearDrizzle
June 563°F17°C77°F25°C4 mph7 km/h from NorthwestRainCloudy
June 657°F14°C72°F22°C3 mph5 km/h from NorthDrizzleMostly Clear
June 756°F13°C76°F24°C3 mph5 km/h from EastMostly CloudyDrizzle

Yes

Low of 46°F8°C, High of 68°F20°C
Wind: 8 mph13 km/h
Precipitation: None

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