Yes

you do need a jacket based on the weather in Milpitas, CA 95035, USA 1 second ago

Why? Because it's not very warm out!
57°F14°C & Mostly Clear

Wind is 4 mph7 km/h from the Northwest, gusting to 9 mph15 km/h
July 6
3am57°F14°C4 mph7 km/h NorthwestMostly Clear
4am55°F13°C3 mph4 km/h NorthwestMostly Clear
5am54°F12°C1 mph2 km/h WestMostly Clear
6am54°F12°C2 mph3 km/h NorthwestMostly Cloudy
7am53°F12°C1 mph2 km/h SouthMostly Clear
8am53°F11°C2 mph3 km/h SoutheastPartly Cloudy
9am52°F11°C2 mph3 km/h SouthMostly Clear
10am54°F12°C2 mph3 km/h SouthMostly Clear
11am57°F14°C2 mph3 km/h SouthwestMostly Clear
12pm60°F16°C2 mph3 km/h SouthwestMostly Clear
1pm64°F18°C3 mph4 km/h WestClear
2pm68°F20°C4 mph6 km/h WestClear
DateLowHighWindDayNight
July 552°F11°C76°F24°C4 mph7 km/h from NorthwestClearMostly Clear
July 652°F11°C79°F26°C5 mph8 km/h from WestClearMostly Clear
July 755°F13°C80°F27°C5 mph8 km/h from WestClearClear
July 854°F12°C79°F26°C5 mph8 km/h from WestClearPartly Cloudy
July 957°F14°C78°F25°C5 mph8 km/h from NorthwestMostly ClearClear
July 1057°F14°C91°F33°C5 mph8 km/h from NorthwestClearClear
July 1160°F16°C86°F30°C4 mph7 km/h from NorthwestClearClear

Yes

Low of 53°F12°C, High of 79°F26°C
Wind: 5 mph8 km/h
Precipitation: None

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