Yes

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

Why? Because it's really really huffing out there!
60°F16°C & Windy

Wind is 16 mph25 km/h from the West, gusting to 34 mph54 km/h
June 19
10pm58°F15°C16 mph25 km/h WestWindy
11pm56°F13°C14 mph23 km/h WestMostly Clear
June 20
12am55°F13°C12 mph19 km/h WestMostly Clear
1am54°F12°C12 mph19 km/h WestMostly Clear
2am54°F12°C12 mph19 km/h WestMostly Clear
3am54°F12°C11 mph18 km/h WestPartly Cloudy
4am54°F12°C12 mph20 km/h WestMostly Cloudy
5am53°F12°C13 mph22 km/h WestMostly Cloudy
6am53°F11°C13 mph21 km/h WestMostly Cloudy
7am52°F11°C13 mph21 km/h WestMostly Cloudy
8am52°F11°C13 mph20 km/h WestMostly Cloudy
9am53°F11°C13 mph20 km/h WestMostly Cloudy
DateLowHighWindDayNight
June 1952°F11°C65°F18°C9 mph15 km/h from WestMostly ClearPartly Cloudy
June 2052°F11°C62°F17°C17 mph27 km/h from WestWindyMostly Clear
June 2151°F10°C65°F19°C11 mph18 km/h from NorthwestClearClear
June 2252°F11°C66°F19°C9 mph14 km/h from WestClearPartly Cloudy
June 2352°F11°C67°F19°C6 mph10 km/h from WestMostly ClearMostly Cloudy
June 2453°F12°C62°F17°C7 mph12 km/h from WestMostly CloudyMostly Cloudy
June 2552°F11°C63°F17°C7 mph12 km/h from WestPartly CloudyPartly Cloudy

Yes

Low of 53°F12°C, High of 62°F17°C
Wind: 17 mph27 km/h
Precipitation: None

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