Lehigh County Climate
Lehigh County, Pennsylvania
Avg Annual Temp
53.1°F
Annual Precip
48.3"
Annual Snowfall
33.1"
Extreme Heat Days
18.2
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Lehigh County Weather
A Balance of Sun and Rain
Lehigh County's 53.1°F average temperature sits right at the U.S. median for temperate climates. It features a humid continental environment with significant moisture and well-defined seasonal shifts.
One of Pennsylvania's Warmer Counties
The county is significantly warmer than the state average of 49.9°F. This makes Lehigh one of the milder urban corridors in the state, despite its susceptibility to heavy winter storms.
High Precipitation in the Valley
Lehigh receives 48.3 inches of rain annually, which is three inches more than the state average. This makes it wetter than nearby Lancaster and Luzerne counties.
Brisk Winters and Humid Summers
Winter brings 33.1 inches of snow and a 32.5°F average temperature. In summer, the county experiences 18 extreme heat days with July averages hitting 75.6°F.
Ready the Shovels and AC
Homeowners need heavy-duty snow removal equipment for the 33.1 inches of annual snowfall. Cooling costs also peak in July as temperatures frequently exceed 90°F for nearly three weeks.
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.