Yes

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

Why? Because you're not freezing, but you’ll definitely start complaining if it lasts much longer!
35°F2°C & Mostly Clear

Wind is 4 mph6 km/h from the Northwest, gusting to 7 mph11 km/h
October 27
5am35°F2°C4 mph7 km/h NorthwestMostly Clear
6am34°F1°C4 mph6 km/h NorthwestMostly Clear
7am34°F1°C4 mph6 km/h NorthwestMostly Clear
8am34°F1°C4 mph6 km/h NorthwestMostly Clear
9am33°F1°C4 mph7 km/h NorthwestMostly Clear
10am33°F0°C4 mph7 km/h NorthMostly Clear
11am33°F1°C4 mph7 km/h NorthMostly Clear
12pm35°F1°C4 mph6 km/h NorthPartly Cloudy
1pm38°F3°C4 mph7 km/h NorthPartly Cloudy
2pm41°F5°C5 mph8 km/h NorthMostly Clear
3pm44°F7°C4 mph7 km/h NorthPartly Cloudy
4pm47°F8°C4 mph6 km/h NortheastMostly Clear
DateLowHighWindDayNight
October 2733°F0°C50°F10°C4 mph7 km/h from NortheastPartly CloudyMostly Clear
October 2834°F1°C53°F12°C6 mph10 km/h from NortheastMostly ClearMostly Clear
October 2933°F1°C53°F12°C5 mph8 km/h from NortheastMostly ClearPartly Cloudy
October 3034°F1°C48°F9°C7 mph12 km/h from NortheastRainRain
October 3142°F6°C52°F11°C10 mph15 km/h from SoutheastRainDrizzle
November 139°F4°C47°F8°C12 mph19 km/h from WestCloudyMostly Cloudy
November 235°F2°C48°F9°C7 mph11 km/h from SouthwestMostly CloudyMostly Cloudy

Yes

Low of 34°F1°C, High of 53°F12°C
Wind: 6 mph10 km/h
Precipitation: None

Support This Page