Hottest and Coldest Temperatures Ever in Philadelphia on October 09

On October 9th, Philadelphia experienced a range of temperatures throughout history. The hottest recorded temperature on this date was 84.9°F in 1990, while the coldest was recorded at 35.1°F in 1978. The average temperature for this day is typically around 60.60°F, with an average high of 66.35°F and an average low of 54.84°F. Looking back to the year 1978, an interesting news item is that the first ever cellular telephone system was introduced during that time. This technology revolutionized communication and laid the foundation for today's mobile devices.