Weather in Wilmington & the Brandywine Valley: What to Know and Wear

The first spring blooms arrive in the gardens of Wilmington and the Brandywine Valley in late March, but temperatures don’t start climbing above 50 reliably until the second half of April.

After that, expect a steady warmup until summer, when temperatures range from a comfortable mid-70s to a scorching and humid high 90s. This is when you'll see kayakers and tubers take to our local rivers to beat the heat.

Cooler weather typically arrives in late September or early October, which is also when the leaves begin to change. The Brandywine Valley is renowned for its beauty at the height of the fall foliage season, which usually runs from mid-October through mid-November. Expect fall temps to include chilly evenings in the 40s and 50s and warm days that range from 55 to 75.

In early December, the winter jackets come out, and while Wilmington can have an occasional white Christmas, most of the snow that comes falls between January and March. The winter months typically range from the 20s to the 40s and see one or two significant snowfalls and cold spells that might freeze local lakes and streams.

Your Guide to the Seasons


Spring can be unpredictable in Greater Wilmington. Be prepared for warm, sunny days amid spring blooms or blustery, windy ones that can bring a chill.


Summer gets hot and humid in Greater Wilmington, sometimes climbing into the triple digits. Plan on light breathable fabrics, and bring plenty of water for outdoor excursions.

Leslie Kipp


Fall can seem like a summer day in Greater Wilmington, but you might encounter the occasional dip in temperature down into the 40's 50's, so pack clothes for layering.

Moonloop Photography


Winters have been getting warmer (with temperatures in the 50s some days), but the average winter day will be in the 30s or 40s, with the occasional spell of days in the 20's.

Spotlight on Wilmington