Yes

you do need a jacket based on the weather in Bellevue, WA 98007, USA 1 second ago

Why? Because just cool enough for a jacket, but not warm enough to ditch it!
54°F12°C & Cloudy

Wind is 4 mph6 km/h from the North, gusting to 7 mph11 km/h
October 30
11pm54°F12°C4 mph6 km/h NorthCloudy
October 31
12am53°F12°C3 mph4 km/h NorthMostly Cloudy
1am50°F10°C3 mph5 km/h NorthMostly Cloudy
2am48°F9°C2 mph4 km/h NortheastPartly Cloudy
3am47°F8°C3 mph4 km/h EastMostly Clear
4am46°F8°C2 mph4 km/h SouthMostly Clear
5am45°F7°C4 mph6 km/h NortheastPartly Cloudy
6am44°F7°C5 mph7 km/h SoutheastPartly Cloudy
7am44°F6°C4 mph6 km/h SoutheastMostly Cloudy
8am43°F6°C4 mph6 km/h SoutheastPartly Cloudy
9am42°F6°C4 mph6 km/h SouthMostly Cloudy
10am42°F5°C4 mph6 km/h SouthMostly Cloudy
DateLowHighWindDayNight
October 3039°F4°C54°F12°C2 mph3 km/h from NorthMostly CloudyPartly Cloudy
October 3141°F5°C53°F12°C3 mph5 km/h from SouthRainRain
November 147°F9°C56°F14°C8 mph12 km/h from SouthRainDrizzle
November 243°F6°C54°F12°C4 mph6 km/h from SouthPartly CloudyCloudy
November 342°F5°C50°F10°C4 mph6 km/h from NortheastRainRain
November 444°F7°C54°F12°C4 mph6 km/h from SoutheastRainDrizzle
November 551°F11°C58°F14°C7 mph12 km/h from SouthRainDrizzle

Yes

Low of 41°F5°C, High of 54°F12°C
Wind: 3 mph5 km/h
Precipitation: 82% rain

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