Historical weather data, all-time temperature records, and monthly climate averages for Wilmington, DE. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 5th in Wilmington sits right in that shoulder-season sweet spot — expect a high around 58° and a low near 38°, with just a 32% chance of rain and nearly zero snow risk. But the date has a wild range in the record books: it hit 85° back in 1942, and bottomed out at a brutal 20° in 1975.
Wilmington doesn't mess around at the extremes — the all-time high of 103° in July 1936 and an all-time low of -15° in February 1934 put a 118-degree spread on the books. On the wet side, Hurricane Floyd dropped a staggering 9.3 inches in a single day in September 1999, and the Blizzard of '96 buried the city under 22 inches of snow in January.
Wilmington peaks in the heat during the week of July 16–22, when average highs hit 86°, and bottoms out in early January with highs around 39°. If you're trying to dodge rain, avoid early-to-mid July — it's both the wettest and hottest stretch of the year. Spring and fall offer the most comfortable conditions, with April and October highs in the low-to-mid 60s.