Yes
you do need a jacket based on the weather in Petaluma, CA, USA 1 second ago
Why? Because it's not very warm out.
57°F14°C & Partly Cloudy
Wind is 2 mph4 km/h from the W, gusting to 6 mph10 km/h
| April 19 | ||||
| 1pm | 58°F14°C | 3 mph5 km/h W | Partly Cloudy | |
| 2pm | 62°F17°C | 3 mph6 km/h W | Mostly Clear | |
| 3pm | 65°F18°C | 4 mph7 km/h W | Mostly Clear | |
| 4pm | 67°F20°C | 6 mph9 km/h W | Mostly Clear | |
| 5pm | 68°F20°C | 7 mph11 km/h W | Clear | |
| 6pm | 68°F20°C | 8 mph12 km/h W | Clear | |
| 7pm | 66°F19°C | 8 mph13 km/h W | Clear | |
| 8pm | 64°F18°C | 8 mph13 km/h W | Clear | |
| 9pm | 62°F17°C | 8 mph12 km/h W | Clear | |
| 10pm | 59°F15°C | 6 mph10 km/h W | Clear | |
| 11pm | 55°F13°C | 5 mph8 km/h W | Clear | |
| April 20 | ||||
| 12am | 53°F11°C | 4 mph7 km/h W | Mostly Clear | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| April 19 | 49°F9°C | 69°F20°C | 5 mph9 km/h from W | Mostly Clear | Partly Cloudy |
| April 20 | 46°F8°C | 71°F22°C | 7 mph11 km/h from W | Mostly Clear | Clear |
| April 21 | 46°F8°C | 75°F24°C | 4 mph6 km/h from W | Clear | Mostly Clear |
| April 22 | 49°F9°C | 75°F24°C | 5 mph8 km/h from SW | Partly Cloudy | Partly Cloudy |
| April 23 | 50°F10°C | 63°F17°C | 7 mph11 km/h from SW | Partly Cloudy | Mostly Cloudy |
| April 24 | 48°F9°C | 62°F17°C | 7 mph12 km/h from W | Mostly Cloudy | Partly Cloudy |
| April 25 | 45°F7°C | 62°F17°C | 7 mph11 km/h from W | Partly Cloudy | Partly Cloudy |
Yes
Low of 46°F8°C, High of 71°F22°CWind: 7 mph11 km/h
Precipitation: None