Yes
you do need a jacket based on the weather in Hayward, CA, USA 8 seconds ago
Why? Because you're not freezing, but you’ll definitely start complaining if it lasts much longer!
38°F3°C & Cloudy
Wind is 2 mph3 km/h from the East, gusting to 3 mph5 km/h
| January 1 | ||||
| 11am | 39°F4°C | 2 mph4 km/h East | Mostly Cloudy | |
| 12pm | 43°F6°C | 2 mph3 km/h East | Mostly Cloudy | |
| 1pm | 48°F9°C | 1 mph2 km/h Northeast | Mostly Cloudy | |
| 2pm | 51°F11°C | 1 mph2 km/h North | Mostly Cloudy | |
| 3pm | 55°F13°C | 2 mph3 km/h Northwest | Partly Cloudy | |
| 4pm | 57°F14°C | 2 mph3 km/h Northwest | Mostly Cloudy | |
| 5pm | 58°F14°C | 2 mph4 km/h Northwest | Mostly Cloudy | |
| 6pm | 58°F14°C | 3 mph4 km/h Northwest | Mostly Cloudy | |
| 7pm | 57°F14°C | 3 mph5 km/h Northwest | Mostly Cloudy | |
| 8pm | 54°F12°C | 2 mph3 km/h Northwest | Mostly Cloudy | |
| 9pm | 52°F11°C | 2 mph3 km/h Northwest | Mostly Cloudy | |
| 10pm | 50°F10°C | 2 mph3 km/h Northeast | Mostly Cloudy | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| January 1 | 37°F3°C | 58°F14°C | 2 mph3 km/h from Northwest | Mostly Cloudy | Mostly Cloudy |
| January 2 | 42°F6°C | 63°F17°C | 3 mph5 km/h from Northeast | Partly Cloudy | Mostly Cloudy |
| January 3 | 47°F8°C | 60°F15°C | 7 mph12 km/h from Southwest | Rain | Mostly Cloudy |
| January 4 | 45°F7°C | 57°F14°C | 4 mph7 km/h from Northwest | Mostly Cloudy | Mostly Cloudy |
| January 5 | 41°F5°C | 60°F15°C | 2 mph3 km/h from Northwest | Partly Cloudy | Partly Cloudy |
| January 6 | 43°F6°C | 60°F16°C | 3 mph4 km/h from Northwest | Partly Cloudy | Mostly Clear |
| January 7 | 42°F6°C | 61°F16°C | 7 mph11 km/h from North | Partly Cloudy | Partly Cloudy |
Yes
Low of 42°F6°C, High of 63°F17°CWind: 3 mph5 km/h
Precipitation: None