Home

Allentown, PA Weather


Allentown, PA climate is warm during summer when temperatures tend to be in the 70's and very cold during winter when temperatures tend to be in the 20's.

The warmest month of the year is July with an average maximum temperature of 83.90 degrees Fahrenheit, while the coldest month of the year is January with an average minimum temperature of 19.10 degrees Fahrenheit.

Temperature variations between night and day tend to be moderate during summer with a difference that can reach 21 degrees Fahrenheit, and fairly limited during winter with an average difference of 17 degrees Fahrenheit.

The annual average precipitation at Allentown is 45.17 Inches. Rainfall in is fairly evenly distributed throughout the year. The wettest month of the year is May with an average rainfall of 4.47 Inches.

Weather Data

Normal Climate

Normal Temperatures

(ALLENTOWN LEHIGH VLY AP Weather station, 3.58 miles from Allentown)
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Max °F 35.0 38.7 48.7 60.1 70.9 79.3 83.9 81.7 74.0 62.9 51.2 40.0 60.5
Mean °F 27.1 29.9 38.8 49.0 59.6 68.5 73.3 71.2 63.4 52.0 42.0 32.0 50.6
Min °F 19.1 21.0 28.9 37.8 48.3 57.7 62.6 60.7 52.7 41.1 32.7 24.0 40.6

Normal Precipitation

(ALLENTOWN LEHIGH VLY AP Weather station, 3.58 miles from Allentown)
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Inch 3.50 2.75 3.56 3.49 4.47 3.99 4.27 4.35 4.37 3.33 3.70 3.39 45.17