Yes
you do need a jacket based on the weather in San Mateo, CA, USA 1 second ago
Why? Because it's not very warm out!
56°F13°C & Mostly Clear
Wind is 9 mph14 km/h from the West, gusting to 17 mph28 km/h
| May 23 | ||||
| 11pm | 56°F13°C | 8 mph13 km/h West | Mostly Clear | |
| May 24 | ||||
| 12am | 54°F12°C | 6 mph10 km/h West | Mostly Clear | |
| 1am | 53°F12°C | 6 mph10 km/h Southwest | Partly Cloudy | |
| 2am | 52°F11°C | 6 mph10 km/h Southwest | Partly Cloudy | |
| 3am | 51°F10°C | 6 mph9 km/h Southwest | Partly Cloudy | |
| 4am | 50°F10°C | 6 mph9 km/h Southwest | Partly Cloudy | |
| 5am | 50°F10°C | 6 mph9 km/h Southwest | Partly Cloudy | |
| 6am | 49°F10°C | 6 mph9 km/h Southwest | Mostly Cloudy | |
| 7am | 50°F10°C | 6 mph10 km/h Southwest | Mostly Cloudy | |
| 8am | 50°F10°C | 6 mph10 km/h Southwest | Mostly Cloudy | |
| 9am | 50°F10°C | 6 mph10 km/h Southwest | Mostly Cloudy | |
| 10am | 51°F11°C | 6 mph9 km/h Southwest | Mostly Cloudy | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| May 23 | 50°F10°C | 63°F17°C | 7 mph12 km/h from West | Partly Cloudy | Partly Cloudy |
| May 24 | 49°F10°C | 61°F16°C | 9 mph15 km/h from West | Partly Cloudy | Mostly Cloudy |
| May 25 | 51°F11°C | 62°F17°C | 11 mph18 km/h from West | Mostly Cloudy | Cloudy |
| May 26 | 52°F11°C | 65°F18°C | 10 mph17 km/h from West | Partly Cloudy | Partly Cloudy |
| May 27 | 50°F10°C | 66°F19°C | 6 mph10 km/h from West | Mostly Clear | Partly Cloudy |
| May 28 | 51°F11°C | 65°F18°C | 7 mph11 km/h from West | Partly Cloudy | Mostly Cloudy |
| May 29 | 53°F12°C | 66°F19°C | 8 mph12 km/h from West | Partly Cloudy | Partly Cloudy |
Yes
Low of 49°F10°C, High of 61°F16°CWind: 9 mph15 km/h
Precipitation: None