No
you don't need a jacket based on the weather in San Mateo, CA, USA 1 second ago
71°F22°C & Mostly Clear
Wind is 4 mph7 km/h from the Northwest, gusting to 9 mph14 km/h
| August 11 | ||||
| 4pm | 71°F22°C | 5 mph7 km/h Northwest | Mostly Clear | |
| 5pm | 73°F23°C | 9 mph14 km/h West | Mostly Clear | |
| 6pm | 72°F22°C | 9 mph14 km/h West | Mostly Clear | |
| 7pm | 72°F22°C | 9 mph15 km/h West | Mostly Clear | |
| 8pm | 70°F21°C | 9 mph14 km/h West | Mostly Clear | |
| 9pm | 68°F20°C | 9 mph14 km/h West | Mostly Clear | |
| 10pm | 65°F18°C | 8 mph12 km/h West | Mostly Clear | |
| 11pm | 61°F16°C | 6 mph10 km/h West | Mostly Clear | |
| August 12 | ||||
| 12am | 59°F15°C | 5 mph8 km/h West | Mostly Clear | |
| 1am | 58°F15°C | 4 mph6 km/h West | Partly Cloudy | |
| 2am | 58°F14°C | 4 mph6 km/h West | Partly Cloudy | |
| 3am | 57°F14°C | 4 mph6 km/h West | Partly Cloudy | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| August 11 | 57°F14°C | 73°F23°C | 5 mph9 km/h from West | Partly Cloudy | Partly Cloudy |
| August 12 | 55°F13°C | 69°F21°C | 6 mph10 km/h from West | Partly Cloudy | Mostly Cloudy |
| August 13 | 56°F14°C | 69°F20°C | 7 mph11 km/h from West | Partly Cloudy | Mostly Cloudy |
| August 14 | 57°F14°C | 66°F19°C | 7 mph11 km/h from West | Partly Cloudy | Partly Cloudy |
| August 15 | 57°F14°C | 69°F21°C | 7 mph12 km/h from West | Mostly Clear | Mostly Cloudy |
| August 16 | 59°F15°C | 68°F20°C | 9 mph15 km/h from West | Mostly Cloudy | Cloudy |
| August 17 | 59°F15°C | 69°F21°C | 8 mph13 km/h from West | Partly Cloudy | Partly Cloudy |
Yes
Low of 55°F13°C, High of 69°F21°CWind: 6 mph10 km/h
Precipitation: None