Historical weather data, all-time temperature records, and monthly climate averages for Darby, PA. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 5th in Darby sits right in that classic spring transition zone — historically, you're looking at a 59° high and 40° low, though the date has swung wildly from 81° back in 1942 to a teeth-chattering 26° in 1965. There's about a 1-in-3 chance of rain, but snow is nearly off the table at just 1%.
Darby's weather history is not for the faint of heart — the thermometer has reached a sweltering 104° on July 3rd, 1966, and bottomed out at -7° on January 17th, 1982, a 111-degree spread between extremes. On the wet side, a single day in July 2013 dumped 8.02 inches of rain, and the Blizzard of '96 buried the area under 27.6 inches of snow in one shot.
Summer is the main event in Darby, with the hottest stretch running mid-to-late July when average highs peak at 88° — and July is also the wettest time of year, averaging over an inch of rain in a single week. If you're cold-averse, steer clear of January and February, when highs barely crack the low 40s; the sweet spots for comfortable weather are May (74°) and September (78°).