DAVENPORT, Iowa – The first widespread frost and freeze of the season will arrive tonight across eastern Iowa and northwest Illinois, signaling a sharp turn toward late-fall conditions. Temperatures are expected to dip into the upper 20s and low 30s by early Thursday, potentially ending the growing season for many communities.
According to the National Weather Service Quad Cities office, a Frost Advisory is in effect area-wide tonight, with a stronger freeze possible Thursday night for parts of the region. Overnight lows will range from 33°F near the Mississippi River to 28°F farther inland, including Dubuque, Freeport, and Iowa City. Skies will remain clear and winds light—ideal for frost formation on exposed surfaces.
Residents are urged to cover or bring sensitive plants indoors, disconnect garden hoses, and drain outdoor faucets. Farmers and gardeners should also protect late-season crops and equipment from freeze damage. The NWS notes this frost event is running about a week or two behind schedule compared to a typical fall season.
Cool, breezy northwest winds will persist into Thursday, keeping highs in the mid-50s before another frosty night settles in. Milder weather should return by the weekend as temperatures climb back toward the 60s.
Five-Day Forecast for Davenport, IA:
Wed: 56/33 – Clear and breezy; frost develops late.
Thu: 54/29 – Cold start; freeze possible overnight.
Fri: 57/32 – Mostly sunny; chilly morning, light winds.
Sat: 61/38 – Warming trend; pleasant afternoon.
Sun: 65/40 – Mild and dry; seasonable sunshine.
