Historical weather data, all-time temperature records, and monthly climate averages for Haddington, PA. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 4th in Haddington runs comfortably mild, with highs averaging 61° and lows around 43° over 30 years of records. It's a coin-flip day for rain — nearly a 47% chance of precipitation — but snow is essentially off the table. The date's range tells the real story: anywhere from a chilly 32° (2013) to a shirt-sleeve 79° (1999).
Haddington earns its summers — the all-time high hit a scorching 104° on July 5, 1999, while winters can bite hard, bottoming out at -5° on January 19, 1994. On the wet side, a single day in September 2004 dropped 7.5 inches of rain, and the January 1996 blizzard buried the area under 24 inches of snow.
July and early August are prime time here, with average highs pushing 89–91° during the warmest stretch of mid-July. If you're cold-averse, avoid mid-January, when highs average just 40°. Rain is spread fairly evenly through the year, but early-to-mid July is the wettest window, averaging nearly 1.4 inches in a single week.