Lebanon County Climate
Lebanon County, Pennsylvania
Avg Annual Temp
52.3°F
Annual Precip
46.4"
Annual Snowfall
24.0"
Extreme Heat Days
12.8
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Lebanon County Weather
A Classic Four-Season Temperate Zone
Lebanon County’s 52.3°F average temperature places it in the heart of the temperate humid continental zone. This climate offers a diverse weather experience throughout the year, staying near the national median.
Milder Than the State Average
The county stays 2.4 degrees warmer than the Pennsylvania state average of 49.9°F. This relative warmth helps moderate the severity of winter compared to the state's northern mountain counties.
Plenty of Rainfall for Agriculture
With 46.4 inches of annual precipitation, Lebanon is wetter than the state average and slightly outpaces neighboring Lancaster. This ample rainfall fuels the local water table and regional farming.
Moderate Snowfall and Fewer Heatwaves
The county sees 24.0 inches of snow annually, which is average for the region. It experiences only 13 extreme heat days, offering more summer relief than many southern Pennsylvania neighbors.
Winterize for Sub-Freezing Januarys
Heating systems must be ready for a January average of 29.5°F. While extreme heat is less frequent here, adequate ventilation is still needed for the 74.3°F July peaks.
Frequently Asked Questions
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Data source: NOAA National Centers for Environmental Information (NCEI), U.S. Climate Normals 1991-2020.
Climate normals are 30-year averages of weather variables computed from 1991 to 2020. Station data is aggregated to county level using spatial averaging. Data is informational only — not a substitute for official National Weather Service forecasts or emergency weather warnings.