Yes
you do need a jacket based on the weather in Lancaster County, PA, USA 1 second ago
Why? Because it's cool. Pleasantly cool, but cool!
55°F13°C & Cloudy
Wind is 2 mph4 km/h from the South, gusting to 3 mph5 km/h
| May 8 | ||||
| 4am | 55°F13°C | 3 mph5 km/h Southeast | Cloudy | |
| 5am | 54°F12°C | 3 mph5 km/h Southeast | Mostly Cloudy | |
| 6am | 54°F12°C | 3 mph5 km/h Southwest | Partly Cloudy | |
| 7am | 56°F13°C | 3 mph4 km/h West | Clear | |
| 8am | 60°F16°C | 2 mph2 km/h West | Partly Cloudy | |
| 9am | 64°F18°C | 3 mph5 km/h West | Mostly Cloudy | |
| 10am | 68°F20°C | 3 mph4 km/h West | Mostly Clear | |
| 11am | 71°F22°C | 3 mph4 km/h West | Partly Cloudy | |
| 12pm | 73°F23°C | 4 mph6 km/h West | Mostly Cloudy | |
| 1pm | 74°F24°C | 5 mph7 km/h West | Mostly Cloudy | |
| 2pm | 75°F24°C | 4 mph7 km/h West | Mostly Cloudy | |
| 3pm | 76°F24°C | 5 mph8 km/h West | Mostly Cloudy | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| May 8 | 54°F12°C | 76°F24°C | 4 mph6 km/h from West | Partly Cloudy | Rain |
| May 9 | 50°F10°C | 59°F15°C | 9 mph14 km/h from Northwest | Rain | Drizzle |
| May 10 | 47°F8°C | 70°F21°C | 12 mph20 km/h from Northwest | Clear | Mostly Clear |
| May 11 | 49°F9°C | 73°F23°C | 6 mph9 km/h from Northwest | Mostly Clear | Mostly Clear |
| May 12 | 51°F11°C | 76°F24°C | 6 mph10 km/h from South | Partly Cloudy | Cloudy |
| May 13 | 56°F13°C | 73°F23°C | 8 mph12 km/h from Southeast | Rain | Rain |
| May 14 | 59°F15°C | 73°F23°C | 6 mph10 km/h from Southeast | Rain | Drizzle |
Yes
Low of 50°F10°C, High of 59°F15°CWind: 9 mph14 km/h
Precipitation: 87% rain