Yes
you do need a jacket based on the weather in Lancaster, PA, USA 1 second ago
Why? Because it's cold enough to freeze the brass off a bald monkey and the wind is harsh and biting!
21°F-6°C & Mostly Cloudy
Wind is 14 mph23 km/h from the Northwest, gusting to 25 mph40 km/h
| January 20 | ||||
| 12pm | 21°F-6°C | 15 mph24 km/h Northwest | Mostly Cloudy | |
| 1pm | 20°F-6°C | 15 mph23 km/h West | Mostly Cloudy | |
| 2pm | 20°F-7°C | 14 mph23 km/h West | Mostly Cloudy | |
| 3pm | 19°F-7°C | 13 mph22 km/h West | Mostly Cloudy | |
| 4pm | 18°F-8°C | 12 mph19 km/h West | Partly Cloudy | |
| 5pm | 16°F-9°C | 10 mph16 km/h West | Partly Cloudy | |
| 6pm | 14°F-10°C | 8 mph14 km/h West | Mostly Clear | |
| 7pm | 13°F-10°C | 7 mph12 km/h West | Mostly Clear | |
| 8pm | 12°F-11°C | 7 mph11 km/h West | Clear | |
| 9pm | 11°F-12°C | 7 mph11 km/h West | Clear | |
| 10pm | 10°F-12°C | 6 mph10 km/h West | Mostly Clear | |
| 11pm | 8°F-13°C | 6 mph9 km/h West | Mostly Clear | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| January 20 | 8°F-14°C | 21°F-6°C | 10 mph17 km/h from Northwest | Partly Cloudy | Mostly Clear |
| January 21 | 4°F-15°C | 16°F-9°C | 6 mph10 km/h from West | Mostly Cloudy | Partly Cloudy |
| January 22 | 2°F-17°C | 17°F-9°C | 6 mph9 km/h from Northwest | Mostly Clear | Partly Cloudy |
| January 23 | 9°F-13°C | 29°F-2°C | 4 mph7 km/h from South | Mostly Clear | Mostly Clear |
| January 24 | 13°F-11°C | 29°F-2°C | 6 mph10 km/h from Northwest | Mostly Clear | Mostly Clear |
| January 25 | 14°F-10°C | 33°F0°C | 7 mph12 km/h from West | Mostly Clear | Mostly Cloudy |
| January 26 | 22°F-5°C | 38°F3°C | 5 mph8 km/h from Southwest | Cloudy | Mostly Cloudy |
Yes
Low of 4°F-16°C, High of 16°F-9°CWind: 6 mph10 km/h
Precipitation: None