No
you don't need a jacket based on the weather in Half Moon Bay, CA, USA 1 second ago
64°F18°C & Mostly Clear
Wind is 2 mph4 km/h from the West, gusting to 4 mph7 km/h
| September 17 | ||||
| 11pm | 63°F17°C | 2 mph4 km/h West | Mostly Clear | |
| September 18 | ||||
| 12am | 62°F17°C | 2 mph3 km/h West | Mostly Cloudy | |
| 1am | 62°F16°C | 2 mph4 km/h Southwest | Mostly Cloudy | |
| 2am | 61°F16°C | 2 mph3 km/h Southwest | Mostly Cloudy | |
| 3am | 60°F16°C | 2 mph3 km/h Southwest | Mostly Cloudy | |
| 4am | 60°F15°C | 2 mph4 km/h Southwest | Mostly Cloudy | |
| 5am | 59°F15°C | 3 mph5 km/h South | Mostly Cloudy | |
| 6am | 59°F15°C | 2 mph4 km/h Southwest | Cloudy | |
| 7am | 60°F15°C | 3 mph5 km/h Southwest | Mostly Cloudy | |
| 8am | 59°F15°C | 3 mph5 km/h Southwest | Mostly Cloudy | |
| 9am | 60°F15°C | 3 mph5 km/h Southwest | Cloudy | |
| 10am | 60°F15°C | 4 mph7 km/h Southwest | Cloudy | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| September 17 | 55°F13°C | 68°F20°C | 3 mph5 km/h from West | Partly Cloudy | Mostly Cloudy |
| September 18 | 59°F15°C | 69°F20°C | 6 mph10 km/h from Southwest | Cloudy | Cloudy |
| September 19 | 60°F16°C | 68°F20°C | 6 mph9 km/h from Southwest | Partly Cloudy | Partly Cloudy |
| September 20 | 59°F15°C | 70°F21°C | 5 mph8 km/h from West | Partly Cloudy | Mostly Cloudy |
| September 21 | 58°F14°C | 69°F20°C | 5 mph9 km/h from Northwest | Partly Cloudy | Partly Cloudy |
| September 22 | 57°F14°C | 73°F23°C | 4 mph6 km/h from Northwest | Mostly Clear | Partly Cloudy |
| September 23 | 60°F16°C | 70°F21°C | 5 mph9 km/h from Southwest | Drizzle | Drizzle |
No
Low of 59°F15°C, High of 69°F21°CWind: 6 mph10 km/h
Precipitation: 15% rain