Hottest and Coldest Temperatures Ever in Philadelphia on June 23

On June 23rd in Philadelphia, the weather reached a maximum temperature of 95.0°F in 1988, making it the hottest recorded temperature on this day. Conversely, the coldest temperature on record was 46.9°F in 1963. The average temperature for this date stands at 73.76°F, with an average high of 77.81°F and an average low of 69.71°F. In 1988, besides the scorching heat, Philadelphia experienced an interesting event as the world's first detected pulsar planet was discovered, orbiting a dense neutron star about 1,290 light-years away.