No
you don't need a jacket based on the weather in Placentia, CA 92870, USA 1 second ago
70°F21°C & Cloudy
Wind is 3 mph5 km/h from the Northwest, gusting to 6 mph10 km/h
| September 18 | ||||
| 8am | 70°F21°C | 4 mph7 km/h Northwest | Thunderstorms | |
| 9am | 69°F21°C | 4 mph6 km/h Northwest | Thunderstorms | |
| 10am | 70°F21°C | 5 mph7 km/h North | Drizzle | |
| 11am | 71°F22°C | 4 mph6 km/h Northeast | Mostly Cloudy | |
| 12pm | 73°F23°C | 4 mph7 km/h South | Partly Cloudy | |
| 1pm | 77°F25°C | 4 mph6 km/h Southeast | Partly Cloudy | |
| 2pm | 80°F27°C | 6 mph10 km/h South | Mostly Clear | |
| 3pm | 81°F27°C | 6 mph9 km/h South | Partly Cloudy | |
| 4pm | 83°F28°C | 7 mph11 km/h South | Partly Cloudy | |
| 5pm | 83°F29°C | 7 mph12 km/h South | Partly Cloudy | |
| 6pm | 84°F29°C | 7 mph12 km/h Southwest | Mostly Clear | |
| 7pm | 83°F28°C | 8 mph13 km/h Southwest | Mostly Clear | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| September 18 | 69°F21°C | 84°F29°C | 6 mph10 km/h from South | Thunderstorms | Partly Cloudy |
| September 19 | 68°F20°C | 84°F29°C | 5 mph8 km/h from Southwest | Mostly Clear | Mostly Clear |
| September 20 | 66°F19°C | 87°F31°C | 5 mph8 km/h from Southwest | Clear | Mostly Clear |
| September 21 | 66°F19°C | 85°F29°C | 5 mph8 km/h from Southwest | Partly Cloudy | Partly Cloudy |
| September 22 | 67°F19°C | 90°F32°C | 5 mph8 km/h from Southwest | Mostly Clear | Clear |
| September 23 | 67°F19°C | 89°F32°C | 5 mph8 km/h from Southwest | Mostly Clear | Clear |
| September 24 | 66°F19°C | 88°F31°C | 5 mph8 km/h from Southwest | Clear | Clear |
No
Low of 68°F20°C, High of 84°F29°CWind: 5 mph8 km/h
Precipitation: None