Historical weather data, all-time temperature records, and monthly climate averages for Hermitage, PA. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 4th in Hermitage sits right on the knife's edge of early spring — the average high is just 53° with an average low dipping to freezing. There's a coin-flip chance of precipitation today, and a 1-in-5 shot at snow, though the date has seen everything from 76° sunshine back in 1981 to a brutal 16° low in 1954.
Hermitage has seen the full extremes of western Pennsylvania weather, from a scorching 103° in July 1936 to a bone-cracking -22° in January 1994 — a swing of 125 degrees. A single day in July 2003 dropped 4.65 inches of rain, and a January 1948 storm buried the area under 17.2 inches of snow.
Summer is the sweet spot for Hermitage, with highs peaking around 83° in late July — though that's also when the area gets its heaviest rainfall, averaging over an inch a week. Winters are genuinely cold, with January highs averaging just 32° to 33°. Spring arrives gradually through April and May, making June through September the most reliably comfortable window to visit.