No
you don't need a jacket based on the weather in San Mateo, CA, USA 1 second ago
66°F19°C & Mostly Cloudy
Wind is 11 mph17 km/h from the West, gusting to 19 mph30 km/h
| July 21 | ||||
| 6pm | 66°F19°C | 11 mph18 km/h West | Partly Cloudy | |
| 7pm | 66°F19°C | 11 mph18 km/h West | Partly Cloudy | |
| 8pm | 65°F18°C | 11 mph17 km/h West | Partly Cloudy | |
| 9pm | 64°F18°C | 10 mph16 km/h West | Mostly Cloudy | |
| 10pm | 62°F17°C | 9 mph14 km/h West | Mostly Cloudy | |
| 11pm | 60°F16°C | 8 mph13 km/h West | Cloudy | |
| July 22 | ||||
| 12am | 59°F15°C | 7 mph12 km/h West | Cloudy | |
| 1am | 58°F15°C | 7 mph11 km/h West | Cloudy | |
| 2am | 58°F14°C | 6 mph10 km/h West | Cloudy | |
| 3am | 57°F14°C | 6 mph10 km/h West | Cloudy | |
| 4am | 57°F14°C | 6 mph10 km/h West | Cloudy | |
| 5am | 56°F13°C | 6 mph10 km/h Southwest | Cloudy | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| July 21 | 57°F14°C | 66°F19°C | 9 mph14 km/h from West | Mostly Cloudy | Cloudy |
| July 22 | 55°F13°C | 64°F18°C | 7 mph11 km/h from West | Cloudy | Cloudy |
| July 23 | 55°F13°C | 66°F19°C | 7 mph11 km/h from West | Mostly Cloudy | Mostly Cloudy |
| July 24 | 56°F13°C | 67°F19°C | 7 mph11 km/h from West | Partly Cloudy | Mostly Cloudy |
| July 25 | 56°F13°C | 66°F19°C | 7 mph12 km/h from West | Partly Cloudy | Mostly Cloudy |
| July 26 | 56°F13°C | 65°F18°C | 8 mph12 km/h from West | Mostly Cloudy | Cloudy |
| July 27 | 56°F13°C | 66°F19°C | 7 mph11 km/h from West | Mostly Cloudy | Mostly Cloudy |
Yes
Low of 55°F13°C, High of 64°F18°CWind: 7 mph11 km/h
Precipitation: 4% rain