Yes
you do need a jacket based on the weather in San Mateo, CA, USA 1 second ago
Why? Because it's cool. Pleasantly cool, but cool.
52°F11°C & Partly Cloudy
Wind is 3 mph5 km/h from the SW, gusting to 7 mph12 km/h
| April 20 | ||||
| 4am | 51°F11°C | 4 mph7 km/h SW | Partly Cloudy | |
| 5am | 51°F10°C | 4 mph7 km/h SW | Partly Cloudy | |
| 6am | 50°F10°C | 4 mph7 km/h SW | Mostly Cloudy | |
| 7am | 49°F10°C | 4 mph6 km/h SW | Mostly Cloudy | |
| 8am | 50°F10°C | 4 mph7 km/h SW | Mostly Cloudy | |
| 9am | 51°F10°C | 4 mph7 km/h SW | Cloudy | |
| 10am | 51°F11°C | 4 mph7 km/h SW | Mostly Cloudy | |
| 11am | 54°F12°C | 4 mph6 km/h SW | Mostly Cloudy | |
| 12pm | 57°F14°C | 4 mph6 km/h W | Partly Cloudy | |
| 1pm | 61°F16°C | 4 mph6 km/h W | Mostly Clear | |
| 2pm | 64°F18°C | 5 mph8 km/h W | Clear | |
| 3pm | 66°F19°C | 7 mph11 km/h W | Clear | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| April 20 | 49°F10°C | 67°F20°C | 7 mph12 km/h from W | Mostly Clear | Mostly Clear |
| April 21 | 52°F11°C | 69°F20°C | 5 mph9 km/h from W | Clear | Mostly Clear |
| April 22 | 52°F11°C | 68°F20°C | 7 mph11 km/h from SW | Mostly Clear | Partly Cloudy |
| April 23 | 52°F11°C | 65°F18°C | 10 mph16 km/h from SW | Mostly Cloudy | Mostly Cloudy |
| April 24 | 51°F10°C | 63°F17°C | 7 mph12 km/h from SW | Mostly Cloudy | Mostly Cloudy |
| April 25 | 51°F10°C | 61°F16°C | 13 mph21 km/h from W | Mostly Cloudy | Mostly Cloudy |
| April 26 | 52°F11°C | 61°F16°C | 16 mph26 km/h from NW | Windy | Partly Cloudy |
Yes
Low of 52°F11°C, High of 69°F21°CWind: 5 mph9 km/h
Precipitation: None