Yes
you do need a jacket based on the weather in Lafayette, CA, USA 1 second ago
Why? Because it's not very warm out.
54°F12°C & Mostly Clear
Wind is 2 mph3 km/h from the SW, gusting to 7 mph11 km/h
| September 21 | ||||
| 11am | 55°F13°C | 2 mph4 km/h SW | Partly Cloudy | |
| 12pm | 59°F15°C | 3 mph4 km/h SW | Mostly Clear | |
| 1pm | 65°F18°C | 2 mph4 km/h SW | Clear | |
| 2pm | 71°F21°C | 2 mph3 km/h W | Clear | |
| 3pm | 76°F24°C | 3 mph4 km/h W | Clear | |
| 4pm | 80°F26°C | 3 mph5 km/h W | Clear | |
| 5pm | 82°F28°C | 4 mph6 km/h W | Clear | |
| 6pm | 82°F28°C | 6 mph10 km/h W | Clear | |
| 7pm | 80°F26°C | 7 mph11 km/h W | Clear | |
| 8pm | 77°F25°C | 7 mph12 km/h W | Clear | |
| 9pm | 73°F23°C | 7 mph11 km/h W | Clear | |
| 10pm | 67°F20°C | 6 mph10 km/h W | Clear | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| September 21 | 53°F11°C | 82°F28°C | 4 mph7 km/h from W | Clear | Mostly Clear |
| September 22 | 52°F11°C | 85°F29°C | 4 mph6 km/h from W | Clear | Clear |
| September 23 | 55°F13°C | 93°F34°C | 3 mph5 km/h from N | Clear | Clear |
| September 24 | 59°F15°C | 88°F31°C | 4 mph7 km/h from W | Clear | Mostly Clear |
| September 25 | 55°F13°C | 75°F24°C | 7 mph11 km/h from SW | Mostly Clear | Partly Cloudy |
| September 26 | 55°F13°C | 77°F25°C | 6 mph10 km/h from SW | Partly Cloudy | Mostly Clear |
| September 27 | 53°F12°C | 82°F28°C | 4 mph6 km/h from SW | Mostly Clear | Mostly Clear |
Yes
Low of 53°F12°C, High of 84°F29°CWind: 4 mph6 km/h
Precipitation: None