Yes
you do need a jacket based on the weather in Castro Valley, CA 94552, USA 1 second ago
Why? Because there's a refreshing nip in the air!
40°F5°C & Mostly Clear
Wind is 2 mph4 km/h from the East, gusting to 6 mph10 km/h
| February 8 | ||||
| 6am | 40°F5°C | 3 mph5 km/h East | Clear | |
| 7am | 40°F4°C | 3 mph4 km/h Northeast | Mostly Clear | |
| 8am | 39°F4°C | 3 mph5 km/h Northeast | Mostly Clear | |
| 9am | 39°F4°C | 3 mph5 km/h Northeast | Mostly Clear | |
| 10am | 38°F4°C | 3 mph5 km/h Northeast | Mostly Clear | |
| 11am | 40°F4°C | 4 mph6 km/h Northeast | Mostly Clear | |
| 12pm | 44°F7°C | 4 mph7 km/h North | Clear | |
| 1pm | 47°F8°C | 4 mph7 km/h North | Clear | |
| 2pm | 50°F10°C | 5 mph8 km/h North | Clear | |
| 3pm | 52°F11°C | 6 mph10 km/h North | Clear | |
| 4pm | 53°F12°C | 7 mph11 km/h North | Clear | |
| 5pm | 54°F12°C | 7 mph11 km/h North | Clear | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| February 8 | 38°F3°C | 54°F12°C | 5 mph8 km/h from North | Clear | Clear |
| February 9 | 34°F1°C | 54°F12°C | 4 mph7 km/h from North | Clear | Clear |
| February 10 | 34°F1°C | 54°F12°C | 3 mph5 km/h from Northwest | Partly Cloudy | Partly Cloudy |
| February 11 | 36°F2°C | 52°F11°C | 6 mph10 km/h from West | Mostly Cloudy | Cloudy |
| February 12 | 38°F4°C | 49°F10°C | 5 mph9 km/h from East | Drizzle | Rain |
| February 13 | 41°F5°C | 55°F13°C | 10 mph17 km/h from Southwest | Rain | Rain |
| February 14 | 43°F6°C | 54°F12°C | 9 mph15 km/h from Southwest | Rain | Mostly Cloudy |
Yes
Low of 35°F2°C, High of 55°F13°CWind: 4 mph7 km/h
Precipitation: None