Lehigh County, Pennsylvania
Overview
Most of the county's climate is considered to fall in the humid continental climate
Humid continental climate
A humid continental climate is a climatic region typified by large seasonal temperature differences, with warm to hot summers and cold winters....

 zone. Summers are typically hot and muggy, fall and spring are generally mild, and winter is cold. Precipitation is almost uniformly distributed throughout the year.

For the city of Allentown, January lows average -6 °C and highs average 1.3 °C (34.3 °F). The lowest officially recorded temperature was -26.7 °C in 1912 .
 
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