Yes
you do need a jacket based on the weather in West Windsor Township (Princeton Junction), New Jersey, United States 1 second ago
Why? Because it's colder than a polar bear's pyjamas!
23°F-5°C & Mostly Cloudy
Wind is 4 mph7 km/h from the Northeast, gusting to 9 mph15 km/h
| December 15 | ||||
| 8am | 24°F-4°C | 5 mph8 km/h Northeast | Cloudy | |
| 9am | 27°F-3°C | 5 mph8 km/h Northeast | Cloudy | |
| 10am | 31°F-0°C | 5 mph8 km/h Northeast | Cloudy | |
| 11am | 34°F1°C | 5 mph8 km/h Northeast | Cloudy | |
| 12pm | 36°F2°C | 5 mph8 km/h Northeast | Cloudy | |
| 1pm | 38°F3°C | 5 mph8 km/h Northeast | Cloudy | |
| 2pm | 39°F4°C | 5 mph8 km/h Northeast | Cloudy | |
| 3pm | 38°F3°C | 5 mph8 km/h Northeast | Cloudy | |
| 4pm | 37°F3°C | 4 mph7 km/h Northeast | Cloudy | |
| 5pm | 35°F2°C | 5 mph7 km/h Northeast | Cloudy | |
| 6pm | 34°F1°C | 4 mph7 km/h Northeast | Cloudy | |
| 7pm | 33°F1°C | 5 mph8 km/h Northeast | Cloudy | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| December 15 | 19°F-7°C | 39°F4°C | 5 mph8 km/h from Northeast | Cloudy | Rain |
| December 16 | 36°F2°C | 51°F10°C | 6 mph10 km/h from Southeast | Drizzle | Drizzle |
| December 17 | 41°F5°C | 59°F15°C | 9 mph15 km/h from West | Partly Cloudy | Mostly Clear |
| December 18 | 34°F1°C | 47°F9°C | 4 mph7 km/h from East | Rain | Rain |
| December 19 | 27°F-3°C | 42°F6°C | 10 mph16 km/h from Northwest | Partly Cloudy | Mostly Clear |
| December 20 | 25°F-4°C | 40°F4°C | 4 mph6 km/h from East | Mostly Cloudy | Mostly Cloudy |
| December 21 | 25°F-4°C | 38°F4°C | 13 mph21 km/h from West | Partly Cloudy | Mostly Cloudy |
Yes
Low of 36°F2°C, High of 51°F11°CWind: 6 mph10 km/h
Precipitation: 74% rain