Yes
you do need a jacket based on the weather in Costa Mesa, CA, USA 1 second ago
Why? Because it's not very warm out!
56°F14°C & Mostly Cloudy
Wind is 4 mph7 km/h from the Southeast, gusting to 8 mph13 km/h
| May 18 | ||||
| 7am | 57°F14°C | 4 mph6 km/h Southeast | Mostly Cloudy | |
| 8am | 57°F14°C | 4 mph7 km/h Southeast | Partly Cloudy | |
| 9am | 56°F14°C | 4 mph7 km/h Southeast | Mostly Clear | |
| 10am | 59°F15°C | 4 mph6 km/h East | Mostly Clear | |
| 11am | 62°F17°C | 5 mph8 km/h Southeast | Partly Cloudy | |
| 12pm | 64°F18°C | 5 mph8 km/h Southeast | Mostly Cloudy | |
| 1pm | 66°F19°C | 7 mph11 km/h South | Partly Cloudy | |
| 2pm | 67°F19°C | 7 mph11 km/h South | Partly Cloudy | |
| 3pm | 68°F20°C | 8 mph13 km/h South | Partly Cloudy | |
| 4pm | 69°F21°C | 9 mph15 km/h Southwest | Mostly Clear | |
| 5pm | 70°F21°C | 9 mph15 km/h Southwest | Mostly Clear | |
| 6pm | 70°F21°C | 10 mph15 km/h Southwest | Clear | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| May 18 | 56°F13°C | 70°F21°C | 7 mph12 km/h from Southwest | Mostly Clear | Mostly Clear |
| May 19 | 57°F14°C | 75°F24°C | 6 mph9 km/h from West | Clear | Mostly Clear |
| May 20 | 59°F15°C | 79°F26°C | 6 mph9 km/h from Southwest | Clear | Clear |
| May 21 | 60°F15°C | 79°F26°C | 5 mph8 km/h from Southwest | Clear | Mostly Clear |
| May 22 | 61°F16°C | 77°F25°C | 5 mph8 km/h from Southwest | Mostly Clear | Partly Cloudy |
| May 23 | 61°F16°C | 74°F23°C | 6 mph10 km/h from South | Partly Cloudy | Partly Cloudy |
| May 24 | 59°F15°C | 71°F21°C | 6 mph10 km/h from Southwest | Mostly Clear | Mostly Clear |
Yes
Low of 56°F14°C, High of 74°F24°CWind: 6 mph9 km/h
Precipitation: None