No
you don't need a jacket based on the weather in San Mateo, CA, USA 1 second ago
68°F20°C & Mostly Clear
Wind is 4 mph7 km/h from the Northwest, gusting to 7 mph11 km/h
| September 1 | ||||
| 2pm | 70°F21°C | 5 mph8 km/h North | Mostly Clear | |
| 3pm | 73°F23°C | 6 mph9 km/h Northwest | Clear | |
| 4pm | 76°F25°C | 7 mph11 km/h Northwest | Clear | |
| 5pm | 78°F26°C | 8 mph14 km/h Northwest | Clear | |
| 6pm | 79°F26°C | 8 mph14 km/h Northwest | Clear | |
| 7pm | 78°F25°C | 8 mph14 km/h West | Clear | |
| 8pm | 76°F25°C | 8 mph14 km/h West | Clear | |
| 9pm | 71°F22°C | 8 mph12 km/h West | Clear | |
| 10pm | 68°F20°C | 6 mph10 km/h West | Clear | |
| 11pm | 65°F18°C | 5 mph8 km/h West | Clear | |
| September 2 | ||||
| 12am | 63°F17°C | 4 mph6 km/h Southwest | Clear | |
| 1am | 62°F17°C | 4 mph7 km/h Southwest | Clear | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| September 1 | 57°F14°C | 79°F26°C | 6 mph10 km/h from Northwest | Clear | Mostly Clear |
| September 2 | 58°F14°C | 75°F24°C | 6 mph10 km/h from West | Mostly Clear | Partly Cloudy |
| September 3 | 58°F14°C | 71°F21°C | 6 mph9 km/h from West | Partly Cloudy | Mostly Cloudy |
| September 4 | 57°F14°C | 68°F20°C | 6 mph10 km/h from West | Mostly Cloudy | Mostly Cloudy |
| September 5 | 58°F15°C | 68°F20°C | 7 mph12 km/h from West | Mostly Cloudy | Mostly Cloudy |
| September 6 | 58°F14°C | 70°F21°C | 6 mph10 km/h from West | Partly Cloudy | Partly Cloudy |
| September 7 | 58°F15°C | 71°F22°C | 5 mph8 km/h from West | Partly Cloudy | Mostly Cloudy |
Yes
Low of 58°F15°C, High of 74°F24°CWind: 6 mph10 km/h
Precipitation: None