Historical weather data, all-time temperature records, and monthly climate averages for Rittenhouse, PA. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 4th in Rittenhouse typically feels like spring is settling in, with an average high of 61° and low of 43°. There's nearly a coin-flip chance of rain (47%), though snow is off the table entirely. The date has swung wildly in the past — a balmy 79° back in 1999, and a freezing 32° low as recently as 2013.
Rittenhouse knows real extremes: the thermometer has hit 104° (July 1999) and plunged to -5° (January 1994), a 109-degree swing across the record books. A single storm dumped 7.5 inches of rain on September 28, 2004, and the Blizzard of '96 buried the area under 24 inches of snow in one day.
Summer is the main event here — highs peak around 91° in late July and stay above 84° through June and August. If you're avoiding the heat, aim for January through March, when highs hover in the low-to-mid 40s and 50s. Wet weather clusters in early-to-mid July, so pack an umbrella if you're visiting for the holiday weekend.