No
you don't need a jacket based on the weather in San Marcos, CA, USA 1 second ago
66°F19°C & Mostly Clear
Wind is 6 mph10 km/h from the West, gusting to 8 mph13 km/h
| March 16 | ||||
| 8pm | 65°F18°C | 6 mph9 km/h West | Mostly Cloudy | |
| 9pm | 62°F17°C | 5 mph8 km/h West | Mostly Cloudy | |
| 10pm | 58°F15°C | 4 mph6 km/h West | Cloudy | |
| 11pm | 55°F13°C | 3 mph4 km/h West | Cloudy | |
| March 17 | ||||
| 12am | 53°F12°C | 2 mph3 km/h West | Mostly Cloudy | |
| 1am | 52°F11°C | 2 mph3 km/h Northwest | Mostly Cloudy | |
| 2am | 52°F11°C | 2 mph3 km/h Northeast | Mostly Cloudy | |
| 3am | 51°F10°C | 2 mph3 km/h Northeast | Cloudy | |
| 4am | 50°F10°C | 2 mph3 km/h Northeast | Cloudy | |
| 5am | 49°F10°C | 2 mph3 km/h Northeast | Cloudy | |
| 6am | 49°F9°C | 2 mph3 km/h North | Cloudy | |
| 7am | 49°F9°C | 2 mph3 km/h North | Cloudy | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| March 16 | 43°F6°C | 68°F20°C | 4 mph6 km/h from West | Partly Cloudy | Cloudy |
| March 17 | 48°F9°C | 63°F17°C | 6 mph10 km/h from West | Mostly Cloudy | Drizzle |
| March 18 | 45°F7°C | 62°F17°C | 5 mph9 km/h from West | Clear | Clear |
| March 19 | 45°F7°C | 72°F22°C | 5 mph9 km/h from Northwest | Clear | Mostly Clear |
| March 20 | 48°F9°C | 69°F21°C | 5 mph8 km/h from Southwest | Clear | Clear |
| March 21 | 48°F9°C | 71°F22°C | 5 mph8 km/h from West | Mostly Clear | Mostly Clear |
| March 22 | 50°F10°C | 71°F21°C | 5 mph8 km/h from Southwest | Mostly Clear | Mostly Clear |
Yes
Low of 48°F9°C, High of 63°F17°CWind: 6 mph10 km/h
Precipitation: 29% rain