Hottest and Coldest Temperatures Ever in Allentown on March 18

On March 18th in Allentown, the temperature reached a high of 77.0°F in 2011, making it the hottest recorded for this date. Conversely, the coldest temperature ever recorded for the same day was 5.0°F back in 1967. The average temperature on March 18th is 38.96°F, with an average high of 45.44°F and an average low of 32.47°F. In 1967, when the record cold temperature was recorded, an interesting news item emerged: the first successful heart transplant was performed by Dr. Christiaan Barnard in South Africa, marking a major milestone in medical history.