Downtown Green Bay, Green Bay Weather
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Climate of Downtown Green Bay: monthly averages
Based on 25 years of satellite and reanalysis data (2001-2025), July is usually the hottest month in Downtown Green Bay, with average daytime highs around 27°C. January is the coolest, when nights typically fall to about -12°C and frost is possible on the coldest nights. That is a wide yearly range of roughly 39°C, so the seasons feel very different from each other.
The area receives about 880 mm of rain in a typical year. Most of it falls from May to June, and June is the wettest month at roughly 113 mm.
For outdoor plans and travel, July to September usually offer the most comfortable weather in Downtown Green Bay, with mild days and relatively little rain.
| Month | Avg high | Avg low | Rainfall | Humidity |
|---|---|---|---|---|
| Jan | -4° | -12° | 34 mm | 90% |
| Feb | -3° | -11° | 35 mm | 88% |
| Mar | 4° | -5° | 54 mm | 81% |
| Apr | 11° | 0° | 86 mm | 77% |
| May | 17° | 7° | 102 mm | 77% |
| Jun | 23° | 13° | 113 mm | 78% |
| Jul | 27° | 17° | 89 mm | 75% |
| Aug | 26° | 16° | 89 mm | 74% |
| Sep | 22° | 12° | 85 mm | 76% |
| Oct | 14° | 5° | 87 mm | 79% |
| Nov | 6° | -1° | 53 mm | 83% |
| Dec | -1° | -8° | 51 mm | 89% |
Source: NASA POWER (MERRA-2 reanalysis), averaged over the roughly 50 km grid area around Downtown Green Bay. Values describe typical conditions, not a forecast.
About Downtown Green Bay weather
Downtown Green Bay lies in Wisconsin's humid continental climate, with cold winters shaped by its Great Lakes location — about 165 km north of Milwaukee. Expect warm summers (June–August) with highs in the high 20s°C. Winter brings cold, snowy winters (December–February) with lake-effect snow near Lake Michigan. This page shows live, auto-refreshing weather for Downtown Green Bay: current conditions, an hourly breakdown, a 16-day outlook, a date-lookup tool for any past or future date, and real-time air quality, sourced from Open-Meteo. Local timezone: America/Chicago.
Frequently asked questions
Downtown Green Bay is about 165 km north of Milwaukee, in Wisconsin.
Downtown Green Bay sees cold, snowy winters (December–February) with lake-effect snow near Lake Michigan.
The live current conditions, hourly forecast and 16-day outlook above are pulled in real time for Downtown Green Bay's exact coordinates. No fixed schedule, the page updates whenever you load it.
July is usually the hottest month in Downtown Green Bay, with average daytime highs of about 27°C and nights around 17°C.
The coldest nights come in January, when the average low is about -12°C and daytime highs reach around -4°C. Frost is possible on clear, calm nights.
Downtown Green Bay receives about 880 mm of rain in a typical year. June is the wettest month at roughly 113 mm, and the main rainy period is May to June.
July to September usually offer the most comfortable weather in Downtown Green Bay, with mild daytime temperatures and little rain.
In November Downtown Green Bay typically sees daytime highs near 6°C and lows near -1°C, with about 53 mm of rain over the month and average humidity around 83%. Check the live forecast above for this week's actual conditions.
Up to 16 days ahead using the extended forecast and date picker above; further-out or historical dates use the same date lookup tool.
The current temperature for Downtown Green Bay updates automatically at the top of this page — scroll to the hourly strip below to see how it's expected to change over the day.
Downtown Green Bay's day-to-day weather follows the broader pattern of Wisconsin described above. See the hourly weather forecast or the air quality index for more detail.