No
you don't need a jacket based on the weather in Castro Valley, CA, USA 1 second ago
62°F17°C & Windy
Wind is 16 mph26 km/h from the W, gusting to 29 mph46 km/h
| April 26 | ||||
| 7pm | 62°F17°C | 16 mph26 km/h W | Windy | |
| 8pm | 61°F16°C | 16 mph25 km/h W | Windy | |
| 9pm | 60°F15°C | 14 mph23 km/h W | Mostly Clear | |
| 10pm | 58°F14°C | 12 mph20 km/h W | Mostly Clear | |
| 11pm | 55°F13°C | 10 mph16 km/h W | Mostly Clear | |
| April 27 | ||||
| 12am | 54°F12°C | 8 mph13 km/h W | Mostly Clear | |
| 1am | 53°F12°C | 6 mph10 km/h W | Mostly Clear | |
| 2am | 52°F11°C | 5 mph9 km/h W | Mostly Clear | |
| 3am | 51°F10°C | 5 mph8 km/h W | Mostly Clear | |
| 4am | 50°F10°C | 5 mph7 km/h SW | Mostly Clear | |
| 5am | 49°F9°C | 4 mph7 km/h SW | Mostly Clear | |
| 6am | 48°F9°C | 4 mph6 km/h SW | Mostly Clear | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| April 26 | 51°F10°C | 63°F17°C | 12 mph20 km/h from W | Partly Cloudy | Mostly Clear |
| April 27 | 47°F8°C | 65°F18°C | 8 mph13 km/h from W | Partly Cloudy | Mostly Clear |
| April 28 | 49°F9°C | 66°F19°C | 9 mph14 km/h from W | Mostly Clear | Mostly Clear |
| April 29 | 47°F8°C | 67°F20°C | 7 mph12 km/h from W | Mostly Clear | Clear |
| April 30 | 47°F8°C | 68°F20°C | 6 mph9 km/h from W | Clear | Clear |
| May 1 | 47°F8°C | 70°F21°C | 6 mph10 km/h from W | Clear | Mostly Clear |
| May 2 | 49°F10°C | 70°F21°C | 7 mph11 km/h from W | Mostly Clear | Partly Cloudy |
Yes
Low of 47°F9°C, High of 64°F18°CWind: 8 mph13 km/h
Precipitation: None