Weather
Wisconsin Weather Alert: Green Bay Rain Risk Rises Oct 28-31
Green Bay, WI – A return to 70 degree temperatures will bring a brief taste of warmer autumn weather to northeastern Wisconsin before increasing rain chances threaten to complicate outdoor plans headi
By Miles Carter · 2026-10-25T10:07:21.015Z
Green Bay, WI – A return to 70 degree temperatures will bring a brief taste of warmer autumn weather to northeastern Wisconsin before increasing rain chances threaten to complicate outdoor plans heading into Halloween weekend. Green Bay is expected to experience a substantial temperature rebound Wednesday, Oct. 28, followed by several opportunities for showers through Saturday, Oct. 31. The developing pattern could affect afternoon travel, outdoor events and Halloween preparations as the final week of October brings changing conditions.
According to the National Weather Service forecast for Green Bay, Wednesday will feature mostly sunny skies and an afternoon high near 70 degrees, following a considerably cooler Monday when temperatures are expected to reach only 54 degrees. However, the favorable conditions may not last through the evening. Forecasters indicate a 40% chance of showers developing mainly after 1 a.m. Thursday, signaling the beginning of a more unsettled period.
Rain Chances Increase After Wednesday's Warmup The approaching change follows several days of fluctuating temperatures across the Green Bay area. Sunday, Oct. 25, is expected to reach 68 degrees under mostly cloudy skies before a 30% chance of showers develops during the evening, mainly before 11 p.m. Northeasterly winds and additional cloud cover accompany a cooler Monday, with afternoon temperatures holding near 54 degrees.
Tuesday brings some improvement as partly sunny skies return and temperatures recover to approximately 58 degrees. Southeast winds between 5 and 9 mph are expected, while nighttime temperatures remain relatively mild near 50 degrees. The gradual warming sets the stage for Wednesday's 70 degree afternoon, a 16 degree increase from Monday's forecast high.
The transition becomes more noticeable heading into Thursday, when temperatures are expected to retreat to approximately 64 degrees. A 20% chance of showers remains in the forecast before 1 p.m., followed by mostly sunny conditions during the afternoon. Another slight chance of rain develops after 1 a.m. Friday.
Changing Conditions Could Affect Travel and Outdoor Plans The unsettled outlook could become relevant for motorists traveling Interstate 41, Interstate 43 and other major routes connecting Green Bay with surrounding Brown County communities. Although the forecast does not indicate widespread hazardous conditions, passing showers could create wet pavement and temporarily reduce visibility during affected travel periods.
Thursday's relatively limited precipitation probability suggests that many outdoor activities may proceed without rain. However, the possibility of showers increases again Friday, when the National Weather Service projects a 30% chance of precipitation and an afternoon high near 67 degrees.
Rain chances become more significant Friday night, increasing to 50% as mostly cloudy skies develop and temperatures fall to approximately 52 degrees. That period could be particularly important for residents preparing outdoor Halloween displays, organizing community events or traveling during the evening.
Halloween Weekend Brings Continued Rain Potential Saturday, Oct. 31, currently carries a 40% chance of showers, with mostly cloudy skies and an afternoon high near 66 degrees. While the forecast does not establish that rain will occur during specific trick or treating hours, the possibility of precipitation makes updated forecasts important for families planning Halloween activities.
The broader NOAA Weather Prediction Center discussion also identifies frontal activity and precipitation affecting portions of the Upper Great Lakes earlier in the week. However, no significant severe weather threat or specific heavy rainfall amount has been established for Green Bay in the supplied local forecast.
Residents should monitor changes in precipitation timing as Halloween approaches, particularly if outdoor celebrations are planned for Saturday afternoon or evening.
Will the possibility of rain change your Halloween weekend plans in Green Bay or surrounding northeastern Wisconsin communities?
Five Day Weather Outlook Sunday 10/25: Mostly cloudy skies are expected, with an afternoon high near 68 degrees and south southwest winds around 5 mph; Sunday night brings a 30% chance of showers, mainly before 11 p.m., with a low near 47 degrees.
Monday 10/26: Mostly cloudy conditions continue as temperatures reach approximately 54 degrees, with north northeast winds between 6 and 8 mph; Monday night remains mostly cloudy, with temperatures dropping to around 42 degrees and east northeast winds near 6 mph.
Tuesday 10/27: Partly sunny skies return, with an afternoon high near 58 degrees and southeast winds between 5 and 9 mph; Tuesday night becomes mostly cloudy, with temperatures falling to approximately 50 degrees.
Wednesday 10/28: Mostly sunny skies and warmer conditions push temperatures to approximately 70 degrees; Wednesday night becomes partly cloudy, with a low near 51 degrees and a 40% chance of showers developing mainly after 1 a.m.
Thursday 10/29: A 20% chance of showers is expected before 1 p.m., followed by mostly sunny skies and an afternoon high near 64 degrees; Thursday night turns partly cloudy, with a low near 47 degrees and another 20% chance of showers after 1 a.m.
Extended Weather Outlook Friday, Oct. 30: Partly sunny skies are expected, with an afternoon high near 67 degrees and a 30% chance of showers. Friday night becomes mostly cloudy, with temperatures falling to approximately 52 degrees and precipitation chances increasing to 50%.
Saturday, Oct. 31 — Halloween: Mostly cloudy skies are expected, with an afternoon high near 66 degrees and a 40% chance of showers. The forecast does not specify a Saturday night low or detailed evening precipitation timing.