Historical weather data, all-time temperature records, and monthly climate averages for Lansdale, PA. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 4th in Lansdale runs mild but unpredictable — expect a high near 58° and a low around 35°, based on 60 years of data. This date has seen a stunning 64-degree swing in extremes, from a balmy 84° in 1963 down to a brutal 20° in 2000. There's a coin-flip chance of rain (43%), but snow is essentially off the table.
Lansdale weather doesn't mess around at the extremes — the thermometer has swung from a scorching 106° in July 1999 all the way down to -17° in January 1994, a range of 123 degrees. The wettest single day on record dumped 6.75 inches on August 28, 2011, while the snowiest dropped 23 inches in a single February 1983 storm.
Summer is the headliner here — the week of July 16–22 averages a high of 87°, making it the peak of the warm season, with late July also being the wettest stretch of the year. Winter bottoms out in early January, when highs barely crack 37°. If you're planning a visit, May through September offers the most comfortable and active weather window.