GREEN BAY, Wis. – A warm, picture-perfect fall weekend will give way to a brisk cooldown by midweek across northeast Wisconsin, as post-Columbus Day temperatures tumble following a stretch of sunshine and calm breezes. Outdoor plans—from pumpkin patch visits to leaf-viewing drives along I-43—should go off without a hitch through the holiday, but colder air is waiting close behind.
According to the National Weather Service in Green Bay, temperatures Saturday through Monday will run well above normal, topping out in the upper 60s to near 70 degrees. A weak system arriving late Monday could bring scattered showers to parts of the Fox Valley and Door County, marking the leading edge of a fall cold snap expected by Tuesday night.
By midweek, highs are projected to fall back into the 50s with clear, chilly nights likely to produce patchy frost north of Highway 29. A Frost Advisory remains in place this morning for central counties including Marathon and Waupaca. Residents planning Columbus Day road trips should anticipate calm travel weather, but should prepare for cooler conditions returning by Tuesday.
Gardeners are urged to protect tender plants later this week, and travelers should keep jackets handy for early-morning commutes. The dry pattern will also help with harvest operations and outdoor events but could cause minor leaf-fire risks if winds pick up late week.
Five-Day Forecast for Green Bay, WI:
Sat: 62/44 – Partly sunny; light northeast breeze.
Sun: 67/55 – Mild and mostly sunny; great fall color viewing.
Mon (Columbus Day): 70/47 – Chance of brief showers; turning cooler late.
Tue: 62/42 – Partly sunny and breezy; cooler trend begins.
Wed: 59/40 – Mostly sunny; crisp fall air returns.
