No
you don't need a jacket based on the weather in Costa Mesa, CA, USA 1 second ago
73°F23°C & Cloudy
Wind is 3 mph5 km/h from the Northwest, gusting to 6 mph9 km/h
| September 18 | ||||
| 2am | 72°F22°C | 3 mph6 km/h Northwest | Cloudy | |
| 3am | 72°F22°C | 3 mph5 km/h North | Cloudy | |
| 4am | 72°F22°C | 5 mph8 km/h North | Cloudy | |
| 5am | 71°F22°C | 4 mph6 km/h West | Cloudy | |
| 6am | 71°F21°C | 6 mph10 km/h Northwest | Cloudy | |
| 7am | 69°F20°C | 6 mph9 km/h North | Rain | |
| 8am | 68°F20°C | 7 mph10 km/h Northwest | Thunderstorms | |
| 9am | 68°F20°C | 4 mph6 km/h Northwest | Rain | |
| 10am | 68°F20°C | 4 mph6 km/h Northwest | Thunderstorms | |
| 11am | 69°F21°C | 3 mph5 km/h Northwest | Mostly Cloudy | |
| 12pm | 71°F22°C | 3 mph5 km/h North | Partly Cloudy | |
| 1pm | 74°F23°C | 5 mph7 km/h East | Partly Cloudy | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| September 17 | 68°F20°C | 82°F28°C | 4 mph7 km/h from West | Partly Cloudy | Thunderstorms |
| September 18 | 68°F20°C | 80°F26°C | 6 mph9 km/h from Southwest | Thunderstorms | Drizzle |
| September 19 | 68°F20°C | 78°F25°C | 6 mph10 km/h from West | Mostly Clear | Partly Cloudy |
| September 20 | 66°F19°C | 78°F26°C | 6 mph10 km/h from West | Mostly Clear | Mostly Clear |
| September 21 | 65°F18°C | 77°F25°C | 5 mph8 km/h from West | Partly Cloudy | Partly Cloudy |
| September 22 | 66°F19°C | 79°F26°C | 5 mph8 km/h from West | Mostly Clear | Mostly Clear |
| September 23 | 67°F20°C | 79°F26°C | 6 mph9 km/h from West | Mostly Clear | Mostly Clear |
No
Low of 68°F20°C, High of 80°F27°CWind: 6 mph9 km/h
Precipitation: 64% rain