Hottest and Coldest Temperatures Ever in Philadelphia on October 15

On October 15th in Philadelphia, the average temperature is typically around 59.00°F. In the past, the highest recorded temperature for this date was 87.1°F in 1975, while the coldest recorded temperature was 35.1°F in 1987. On average, the temperature tends to reach a high of 64.48°F, with a low of 53.53°F. In 1975, the year with the highest temperature, an interesting news item was that Bill Gates and Paul Allen founded Microsoft, marking the beginning of a tech giant.