Yes
you do need a jacket based on the weather in Lancaster, PA 17603, USA 1 second ago
Why? Because it's cool. Pleasantly cool, but cool.
57°F14°C & Cloudy
Wind is 6 mph10 km/h from the E, gusting to 12 mph20 km/h
| April 18 | ||||
| 2am | 56°F13°C | 6 mph10 km/h NE | Cloudy | |
| 3am | 55°F13°C | 6 mph9 km/h E | Cloudy | |
| 4am | 54°F12°C | 5 mph8 km/h NE | Cloudy | |
| 5am | 53°F12°C | 5 mph8 km/h NE | Cloudy | |
| 6am | 52°F11°C | 5 mph9 km/h NE | Cloudy | |
| 7am | 51°F11°C | 6 mph9 km/h NE | Cloudy | |
| 8am | 51°F11°C | 6 mph9 km/h NE | Cloudy | |
| 9am | 53°F11°C | 5 mph9 km/h NE | Cloudy | |
| 10am | 54°F12°C | 6 mph9 km/h NE | Cloudy | |
| 11am | 56°F13°C | 6 mph10 km/h NE | Cloudy | |
| 12pm | 58°F14°C | 6 mph10 km/h NE | Cloudy | |
| 1pm | 60°F15°C | 8 mph12 km/h NE | Mostly Cloudy | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| April 18 | 47°F8°C | 65°F18°C | 8 mph13 km/h from NE | Mostly Cloudy | Partly Cloudy |
| April 19 | 43°F6°C | 63°F17°C | 9 mph14 km/h from SE | Cloudy | Mostly Cloudy |
| April 20 | 47°F8°C | 65°F18°C | 9 mph15 km/h from NW | Partly Cloudy | Partly Cloudy |
| April 21 | 38°F3°C | 58°F14°C | 5 mph8 km/h from W | Cloudy | Mostly Cloudy |
| April 22 | 40°F5°C | 63°F17°C | 4 mph7 km/h from N | Partly Cloudy | Mostly Clear |
| April 23 | 41°F5°C | 69°F20°C | 7 mph11 km/h from S | Mostly Cloudy | Drizzle |
| April 24 | 47°F8°C | 62°F17°C | 9 mph15 km/h from SW | Rain | Mostly Clear |
Yes
Low of 43°F6°C, High of 64°F18°CWind: 9 mph14 km/h
Precipitation: None