No
you don't need a jacket based on the weather in Arcata, CA, USA 2 minutes ago
60°F16°C & Mostly Clear
Wind is 2 mph3 km/h from the North, gusting to 3 mph5 km/h
| September 17 | ||||
| 1am | 59°F15°C | 2 mph3 km/h North | Mostly Clear | |
| 2am | 58°F15°C | 1 mph2 km/h Northeast | Partly Cloudy | |
| 3am | 58°F15°C | 1 mph1 km/h North | Partly Cloudy | |
| 4am | 58°F14°C | 2 mph3 km/h South | Mostly Cloudy | |
| 5am | 58°F14°C | 2 mph3 km/h Northwest | Mostly Cloudy | |
| 6am | 57°F14°C | 1 mph2 km/h North | Mostly Cloudy | |
| 7am | 57°F14°C | 2 mph3 km/h North | Mostly Cloudy | |
| 8am | 56°F13°C | 2 mph2 km/h North | Mostly Cloudy | |
| 9am | 56°F13°C | 2 mph3 km/h North | Mostly Cloudy | |
| 10am | 56°F13°C | 2 mph4 km/h North | Mostly Cloudy | |
| 11am | 57°F14°C | 3 mph4 km/h North | Mostly Cloudy | |
| 12pm | 59°F15°C | 3 mph5 km/h Northwest | Mostly Cloudy | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| September 16 | 53°F12°C | 70°F21°C | 3 mph5 km/h from West | Mostly Clear | Partly Cloudy |
| September 17 | 56°F13°C | 69°F21°C | 5 mph8 km/h from Northwest | Mostly Clear | Mostly Cloudy |
| September 18 | 56°F13°C | 67°F20°C | 4 mph7 km/h from Northwest | Mostly Cloudy | Mostly Cloudy |
| September 19 | 56°F13°C | 68°F20°C | 3 mph5 km/h from West | Mostly Cloudy | Mostly Cloudy |
| September 20 | 56°F14°C | 70°F21°C | 4 mph6 km/h from Northwest | Partly Cloudy | Partly Cloudy |
| September 21 | 55°F13°C | 69°F21°C | 4 mph6 km/h from Northwest | Mostly Clear | Mostly Clear |
| September 22 | 54°F12°C | 69°F20°C | 4 mph6 km/h from Northwest | Partly Cloudy | Mostly Cloudy |
Yes
Low of 55°F13°C, High of 70°F21°CWind: 5 mph8 km/h
Precipitation: None