Lancaster sits in the rolling farmland of south-central Pennsylvania, in one of the warmer corners of the state. Its low elevation and southerly position give it a humid subtropical climate (Köppen Cfa) — long, warm growing seasons that the county's famous agriculture depends on.
Summers are warm and humid, with July highs near the upper 80s and afternoon thunderstorms common over the farmland. Winters are milder than most of Pennsylvania but still cold, with January lows in the mid 20s and roughly 26 to 28 inches of snow a year. Precipitation is plentiful and well-distributed, around 42 to 43 inches annually.
Key hazards are summer thunderstorms — including the hail and wind that threaten crops — winter ice and snow, and flooding along the Conestoga River and the Susquehanna to the west after heavy rain.
Climate normals (approximate)
- Warmest month: July — average high around 87 °F
- Coldest month: January — average low around 25 °F
- Annual precipitation: roughly 42–43 inches
- Annual snowfall: about 26–28 inches
- Climate type: humid subtropical (Köppen Cfa)
Common questions
- Is Lancaster warmer than the rest of Pennsylvania?
- Generally yes. Its low elevation and southern location make it one of the warmer corners of the state, with a long, warm growing season that supports the county's agriculture.
- How much does it snow in Lancaster?
- Roughly 26 to 28 inches a year on average — among the lower totals in Pennsylvania — mostly between December and March.
- What are the main weather risks for Lancaster County farms?
- Summer thunderstorms with hail and damaging wind, late-spring frosts, and flooding along the Conestoga and Susquehanna after heavy rain.
Figures are long-term climate normals (roughly the 1991–2020 reference period) and are meant for context. The live readings at the top of this page always reflect current conditions.