No

you don't need a jacket based on the weather in San Mateo, CA, USA 21 minutes ago

73°F23°C & Mostly Clear

Wind is 7 mph12 km/h from the West, gusting to 13 mph21 km/h
August 11
6pm72°F22°C9 mph14 km/h WestMostly Clear
7pm71°F22°C9 mph15 km/h WestMostly Clear
8pm69°F21°C9 mph15 km/h WestMostly Clear
9pm67°F20°C9 mph15 km/h WestMostly Clear
10pm64°F18°C8 mph13 km/h WestMostly Clear
11pm62°F16°C6 mph10 km/h WestMostly Clear
August 12
12am59°F15°C5 mph9 km/h WestPartly Cloudy
1am58°F14°C4 mph7 km/h WestPartly Cloudy
2am57°F14°C4 mph6 km/h WestPartly Cloudy
3am57°F14°C4 mph6 km/h WestMostly Cloudy
4am57°F14°C4 mph6 km/h WestMostly Cloudy
5am56°F13°C3 mph6 km/h WestMostly Cloudy
DateLowHighWindDayNight
August 1157°F14°C73°F23°C5 mph9 km/h from WestPartly CloudyMostly Cloudy
August 1255°F13°C68°F20°C6 mph10 km/h from WestPartly CloudyMostly Cloudy
August 1356°F13°C67°F20°C7 mph11 km/h from WestPartly CloudyMostly Cloudy
August 1456°F13°C66°F19°C6 mph10 km/h from WestPartly CloudyMostly Clear
August 1556°F13°C70°F21°C7 mph11 km/h from WestMostly ClearMostly Cloudy
August 1659°F15°C68°F20°C9 mph14 km/h from WestMostly CloudyCloudy
August 1759°F15°C69°F20°C7 mph12 km/h from WestPartly CloudyPartly Cloudy

Yes

Low of 55°F13°C, High of 68°F20°C
Wind: 6 mph10 km/h
Precipitation: None

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