Historical weather data, all-time temperature records, and monthly climate averages for Southwest Center City Philadelphia, PA. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 4th in Philadelphia sits right in that transitional sweet spot — historically averaging a 61° high and 43° low, though the date has swung anywhere from a balmy 79° (1999) to a freezing 32° low (2013). Nearly a coin flip on rain, with a 47% precip chance, but snow is off the table.
Southwest Center City Philadelphia plays for keeps when the weather turns extreme — from a brutal -5° in January 1994 to a scorching 104° on July 5th, 1999. A single day in September 2004 dropped 7.5 inches of rain, and the Blizzard of '96 buried the neighborhood under 24 inches of snow.
Summer is the main event here, with highs peaking around 91° in mid-July and staying in the upper 80s through August — bring the humidity tolerance. January and February are the quietest and coldest months, hovering in the low-to-mid 40s. If you're planning around rain, note that July is actually the wettest stretch of the year, not spring.