Hottest and Coldest Temperatures Ever in Allentown on December 21

On December 21 in Allentown, the temperature in 2018 reached the hottest ever recorded at 64.0°F, while in 1955 it plummeted to the coldest ever recorded at 3.0°F. On average, the temperature for this date is 32.52°F, with a high of 40.41°F and a low of 24.64°F. In that same year of 1955, an interesting news item emerged: Rosa Parks, an African American civil rights activist, refused to give up her bus seat to a white passenger in Montgomery, Alabama, sparking the Montgomery Bus Boycott and becoming a significant milestone in the ongoing struggle for civil rights in the United States.