Yes

you do need a jacket based on the weather in Belmont, CA, USA 1 second ago

Why? Because just cool enough for a jacket, but not warm enough to ditch it!
55°F13°C & Mostly Clear

Wind is 1 mph2 km/h from the Southwest, gusting to 4 mph7 km/h
November 6
11am54°F12°C3 mph5 km/h SouthwestMostly Clear
12pm54°F12°C2 mph4 km/h SoutheastMostly Clear
1pm53°F12°C2 mph3 km/h SouthwestPartly Cloudy
2pm53°F12°C3 mph5 km/h SouthwestPartly Cloudy
3pm53°F12°C2 mph3 km/h SouthPartly Cloudy
4pm56°F13°C2 mph4 km/h SouthwestPartly Cloudy
5pm59°F15°C1 mph2 km/h EastPartly Cloudy
6pm61°F16°C2 mph3 km/h NortheastPartly Cloudy
7pm63°F17°C3 mph4 km/h NorthPartly Cloudy
8pm65°F18°C4 mph7 km/h NorthwestMostly Clear
9pm66°F19°C5 mph8 km/h NorthwestMostly Clear
10pm66°F19°C5 mph9 km/h NorthwestMostly Clear
DateLowHighWindDayNight
November 653°F12°C66°F19°C4 mph6 km/h from NorthwestMostly ClearMostly Cloudy
November 756°F13°C67°F19°C4 mph6 km/h from NorthwestMostly CloudyPartly Cloudy
November 854°F12°C70°F21°C3 mph5 km/h from NorthMostly ClearMostly Clear
November 955°F13°C73°F23°C2 mph4 km/h from NorthMostly ClearPartly Cloudy
November 1057°F14°C74°F23°C2 mph4 km/h from NorthMostly CloudyMostly Cloudy
November 1157°F14°C71°F22°C2 mph3 km/h from NorthwestPartly CloudyMostly Cloudy
November 1255°F13°C66°F19°C6 mph9 km/h from SouthRainRain

Yes

Low of 55°F13°C, High of 66°F19°C
Wind: 4 mph6 km/h
Precipitation: 48% clear

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