Historical weather data, all-time temperature records, and monthly climate averages for Monroeville, PA. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 4 in Monroeville lands right in the middle of the spring transition, with average highs near 58° and lows still dipping to a chilly 36°. The date has seen some wild swings — a balmy 74° in 2012 and a teeth-chattering 26° low just one year later in 2013. There's a coin-flip chance of rain today (53%), but snow is essentially off the table.
Monroeville's weather has real range — from a scorching 98° in July 2012 to a brutal -11° on January 31, 2026, that's a 109-degree spread in recorded history. A single day in September 2004 dumped 7.35 inches of rain, and a January 1966 storm buried the area under 14 inches of snow.
Summer is peak season here, with highs averaging 85° the first week of July and staying warm through August and September. If you're cold-averse, avoid mid-January, when average highs barely crack 35°. June is the wettest stretch of the year, averaging over an inch of precipitation in a single week.