No
you don't need a jacket based on the weather in San Mateo, CA, USA 1 second ago
69°F21°C & Mostly Clear
Wind is 4 mph6 km/h from the Northwest, gusting to 7 mph12 km/h
| October 19 | ||||
| 9pm | 70°F21°C | 5 mph8 km/h Northwest | Clear | |
| 10pm | 71°F22°C | 5 mph8 km/h Northwest | Clear | |
| 11pm | 71°F22°C | 6 mph9 km/h Northwest | Clear | |
| October 20 | ||||
| 12am | 69°F20°C | 7 mph11 km/h West | Mostly Clear | |
| 1am | 65°F18°C | 6 mph10 km/h West | Clear | |
| 2am | 62°F17°C | 4 mph7 km/h West | Clear | |
| 3am | 60°F16°C | 4 mph7 km/h Southwest | Clear | |
| 4am | 60°F15°C | 4 mph6 km/h West | Mostly Clear | |
| 5am | 59°F15°C | 3 mph5 km/h Southwest | Mostly Clear | |
| 6am | 58°F14°C | 3 mph4 km/h Southwest | Clear | |
| 7am | 57°F14°C | 3 mph4 km/h Southwest | Mostly Clear | |
| 8am | 56°F13°C | 3 mph4 km/h South | Mostly Clear | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| October 19 | 52°F11°C | 71°F22°C | 4 mph6 km/h from Northwest | Mostly Clear | Mostly Clear |
| October 20 | 53°F12°C | 73°F23°C | 4 mph7 km/h from Northeast | Clear | Clear |
| October 21 | 55°F13°C | 70°F21°C | 4 mph6 km/h from West | Mostly Clear | Partly Cloudy |
| October 22 | 56°F14°C | 66°F19°C | 7 mph11 km/h from Southwest | Partly Cloudy | Partly Cloudy |
| October 23 | 55°F13°C | 65°F19°C | 4 mph7 km/h from Northwest | Partly Cloudy | Partly Cloudy |
| October 24 | 55°F13°C | 65°F19°C | 5 mph8 km/h from West | Mostly Cloudy | Drizzle |
| October 25 | 56°F13°C | 65°F18°C | 6 mph9 km/h from West | Cloudy | Rain |
Yes
Low of 54°F12°C, High of 73°F23°CWind: 4 mph7 km/h
Precipitation: None