Weather
Green Bay, WI Weather: Rain Gives Way to Widespread Frost
Green Bay, WI Northeastern Wisconsin faces a cold start to the weekend, with temperatures in Green Bay expected to fall near freezing Friday night, bringing widespread frost Saturday morning before a
By Dylan Reeves · 2026-10-14T09:58:36.582Z
Green Bay, WI Northeastern Wisconsin faces a cold start to the weekend, with temperatures in Green Bay expected to fall near freezing Friday night, bringing widespread frost Saturday morning before a gradual warmup begins.
According to the National Weather Service forecast for Green Bay, temperatures are expected to drop to approximately 33 degrees early Saturday, following a breezy Friday with northwest wind gusts reaching 34 mph.
The colder conditions will follow a period of rain Thursday into Friday as a changing weather pattern brings cooler Canadian air into the central United States.
The NOAA Weather Prediction Center identifies a strong area of high pressure descending from northern Canada as the driving force behind a significant temperature change across much of the central United States late this week.
Widespread Frost Expected Saturday Morning Friday will mark the transition toward colder conditions in Green Bay.
Temperatures are expected to reach approximately 54 degrees during the afternoon, with northwest winds of 13 to 20 mph and gusts as high as 34 mph.
A 30% chance of showers remains before 1 p.m., but skies should become partly sunny as the day progresses.
By Friday night, temperatures are expected to fall to around 33 degrees.
The National Weather Service specifically forecasts widespread frost, mainly after 5 a.m. Saturday, continuing through approximately 8 a.m.
The near freezing temperatures could threaten sensitive outdoor vegetation, particularly in exposed locations.
Residents with late season gardens, flowers or other temperature sensitive plants may want to consider protective measures before Friday evening.
Sunshine Returns as Temperatures Recover Despite the frosty start, Saturday afternoon should bring sunshine and temperatures near 57 degrees.
The warming trend continues Sunday, when Green Bay is expected to reach 63 degrees under sunny skies.
Monday brings mostly sunny conditions and highs near 64 degrees, followed by temperatures around 66 Tuesday.
That represents a 12 degree increase from Friday's projected high.
The broader NOAA outlook indicates that some areas of the central United States could experience temperature declines of 20 to 25 degrees behind the advancing cold front. However, that regional estimate does not represent a specific predicted drop for Green Bay.
For northeastern Wisconsin, the most significant development is the arrival of near freezing temperatures early Saturday, followed by several days of improving conditions and milder afternoons.
Five Day Weather Outlook: Oct. 16–20 Temperatures below represent National Weather Service forecasts for Green Bay, illustrating expected conditions in northeastern Wisconsin. Frost timing and temperatures may vary elsewhere in the region.
Friday, Oct. 16: A 30% chance of morning showers, followed by partly sunny skies. Breezy, with northwest winds gusting as high as 34 mph. High near 54°. Overnight low around 33°, with widespread frost developing after 5 a.m. Saturday, Oct. 17: Widespread frost before 8 a.m., followed by sunshine. High near 57°. Overnight low around 39° under clear skies. Sunday, Oct. 18: Sunny and warmer, with a high near 63°. Overnight low around 46° under partly cloudy skies. Monday, Oct. 19: Mostly sunny, with temperatures reaching approximately 64°. Overnight low around 43°, with patchy fog possible. Tuesday, Oct. 20: Areas of morning fog, followed by sunshine. High near 66°. Overnight low not available in the supplied forecast.