Historical weather data, all-time temperature records, and monthly climate averages for Hanover, PA. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 5th in Hanover runs the gamut — this date has seen everything from a balmy 83° in 2023 to a bitter 19° back in 2002. On average, expect a mild 59° high and a cool 35° low, with about a 1-in-3 chance of rain. Snow? Not a concern.
Hanover's weather has real range: a scorching 100° on July 22, 2011 sits at one extreme, while January 22, 2025 brought a brutal -16° — a 116-degree spread between the all-time high and low. The wettest single day on record dumped 6.59 inches on September 1, 2021.
Summer is the main event here, with mid-July highs averaging 87° and late July being the wettest stretch of the year at 1.3 inches per week. Winter bottoms out mid-January with average highs barely reaching 37°. If you're planning a visit, May through June offers warm temps in the low-to-mid 70s before the summer humidity sets in.