No
you don't need a jacket based on the weather in Costa Mesa (Westside Costa Mesa), California, United States 1 second ago
71°F21°C & Mostly Clear
Wind is 2 mph3 km/h from the South, gusting to 4 mph7 km/h
| September 19 | ||||
| 2am | 70°F21°C | 2 mph3 km/h South | Mostly Clear | |
| 3am | 69°F21°C | 2 mph3 km/h South | Mostly Clear | |
| 4am | 69°F20°C | 2 mph3 km/h South | Mostly Clear | |
| 5am | 68°F20°C | 3 mph4 km/h South | Mostly Clear | |
| 6am | 68°F20°C | 3 mph4 km/h South | Mostly Clear | |
| 7am | 67°F19°C | 3 mph4 km/h Southwest | Mostly Clear | |
| 8am | 67°F19°C | 2 mph4 km/h South | Mostly Clear | |
| 9am | 67°F19°C | 2 mph3 km/h Southwest | Partly Cloudy | |
| 10am | 67°F20°C | 2 mph3 km/h Southwest | Mostly Cloudy | |
| 11am | 68°F20°C | 2 mph2 km/h West | Mostly Cloudy | |
| 12pm | 70°F21°C | 2 mph3 km/h Southwest | Mostly Cloudy | |
| 1pm | 74°F23°C | 2 mph4 km/h Southwest | Partly Cloudy | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| September 18 | 68°F20°C | 79°F26°C | 3 mph6 km/h from West | Partly Cloudy | Mostly Clear |
| September 19 | 67°F19°C | 79°F26°C | 6 mph9 km/h from Southwest | Mostly Clear | Mostly Clear |
| September 20 | 66°F19°C | 80°F26°C | 6 mph10 km/h from West | Mostly Clear | Partly Cloudy |
| September 21 | 65°F19°C | 79°F26°C | 6 mph9 km/h from Southwest | Partly Cloudy | Mostly Cloudy |
| September 22 | 67°F19°C | 81°F27°C | 5 mph8 km/h from Southwest | Partly Cloudy | Mostly Clear |
| September 23 | 67°F20°C | 81°F27°C | 6 mph9 km/h from Southwest | Mostly Clear | Mostly Clear |
| September 24 | 66°F19°C | 80°F27°C | 6 mph9 km/h from West | Clear | Mostly Clear |
No
Low of 66°F19°C, High of 79°F26°CWind: 6 mph9 km/h
Precipitation: None