Yes
you do need a jacket based on the weather in San Mateo, CA, USA 1 second ago
Why? Because the air feels like the cozy middle ground between summer and winter!
59°F15°C & Clear
Wind is 3 mph5 km/h from the South, gusting to 5 mph8 km/h
| September 22 | ||||
| 6am | 58°F15°C | 4 mph6 km/h South | Clear | |
| 7am | 58°F14°C | 3 mph5 km/h Southwest | Clear | |
| 8am | 57°F14°C | 3 mph5 km/h South | Clear | |
| 9am | 57°F14°C | 3 mph5 km/h Southwest | Mostly Clear | |
| 10am | 57°F14°C | 3 mph6 km/h Southwest | Mostly Clear | |
| 11am | 59°F15°C | 3 mph5 km/h Southwest | Mostly Clear | |
| 12pm | 63°F17°C | 2 mph3 km/h Southwest | Mostly Clear | |
| 1pm | 65°F18°C | 2 mph4 km/h West | Mostly Clear | |
| 2pm | 68°F20°C | 3 mph5 km/h Northwest | Mostly Clear | |
| 3pm | 71°F21°C | 4 mph6 km/h Northwest | Mostly Clear | |
| 4pm | 73°F23°C | 5 mph7 km/h Northwest | Clear | |
| 5pm | 75°F24°C | 5 mph8 km/h West | Clear | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| September 22 | 57°F14°C | 75°F24°C | 5 mph7 km/h from West | Clear | Clear |
| September 23 | 58°F15°C | 81°F27°C | 4 mph7 km/h from Northwest | Clear | Partly Cloudy |
| September 24 | 61°F16°C | 72°F22°C | 5 mph8 km/h from Southwest | Mostly Cloudy | Mostly Cloudy |
| September 25 | 60°F16°C | 70°F21°C | 6 mph9 km/h from West | Partly Cloudy | Mostly Cloudy |
| September 26 | 58°F14°C | 71°F22°C | 5 mph8 km/h from West | Mostly Clear | Mostly Clear |
| September 27 | 57°F14°C | 69°F21°C | 7 mph11 km/h from Southwest | Mostly Clear | Partly Cloudy |
| September 28 | 57°F14°C | 68°F20°C | 7 mph10 km/h from West | Partly Cloudy | Partly Cloudy |
Yes
Low of 58°F15°C, High of 81°F27°CWind: 4 mph7 km/h
Precipitation: None