Allentown Weather In May
The hottest May day in Allentown for the past 67 years was 97 degrees Fahrenheit, most recently measured on May 18, 1962, and the standard high is 71. The record low May temperature in Allentown for the last 67 years was 29 on May 14, 1996, and the regular low is 48.
United States National Weather Service historical Allentown May Weather data shows that on May 7, 1967, the high temperature did not exceed 43 degrees Fahrenheit, the lowest high measured in Allentown in the past 67 years. NWS weather data additionally shows that on May 15, 1991, the lowest recorded temperature on that day did not drop below 71 degrees, the highest low measured in Allentown in the last 67 years.
National Weather Service data shows that the high temperature in Allentown on May First averages 68 degrees Fahrenheit and the high on the final day of May averages 77 degrees. The low temperature in Allentown in May on the first day of the month averages 44 degrees and the low temperature on the last day of the month averages 55 degrees.
Allentown normally receives an average of 4.47 inches of rain during May. May Allentown Weather records show that on May 31, 1972 Allentown received 3.23 inches of rain, the most rain measured in a single day in May.