No
you don't need a jacket based on the weather in San Mateo, CA, USA 1 second ago
61°F16°C & Mostly Clear
Wind is 4 mph7 km/h from the West, gusting to 9 mph15 km/h
| January 10 | ||||
| 8pm | 57°F14°C | 3 mph5 km/h West | Clear | |
| 9pm | 54°F12°C | 4 mph7 km/h West | Clear | |
| 10pm | 52°F11°C | 5 mph8 km/h Northwest | Clear | |
| 11pm | 51°F11°C | 4 mph7 km/h West | Mostly Clear | |
| January 11 | ||||
| 12am | 50°F10°C | 4 mph6 km/h West | Mostly Clear | |
| 1am | 49°F10°C | 3 mph5 km/h West | Partly Cloudy | |
| 2am | 50°F10°C | 3 mph5 km/h West | Mostly Cloudy | |
| 3am | 49°F10°C | 2 mph4 km/h North | Mostly Cloudy | |
| 4am | 49°F9°C | 4 mph6 km/h Northeast | Mostly Cloudy | |
| 5am | 49°F9°C | 5 mph8 km/h Northeast | Mostly Cloudy | |
| 6am | 48°F9°C | 5 mph8 km/h Northeast | Mostly Clear | |
| 7am | 48°F9°C | 5 mph8 km/h Northeast | Mostly Clear | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| January 10 | 46°F8°C | 63°F17°C | 3 mph4 km/h from Northwest | Clear | Partly Cloudy |
| January 11 | 46°F8°C | 62°F17°C | 9 mph15 km/h from North | Clear | Clear |
| January 12 | 45°F7°C | 59°F15°C | 4 mph6 km/h from North | Clear | Clear |
| January 13 | 43°F6°C | 58°F14°C | 9 mph14 km/h from Northeast | Clear | Clear |
| January 14 | 44°F6°C | 59°F15°C | 4 mph6 km/h from Northeast | Clear | Clear |
| January 15 | 43°F6°C | 59°F15°C | 4 mph6 km/h from Northeast | Clear | Clear |
| January 16 | 43°F6°C | 58°F15°C | 3 mph5 km/h from North | Mostly Clear | Mostly Clear |
Yes
Low of 46°F8°C, High of 62°F17°CWind: 9 mph15 km/h
Precipitation: None