Climate averages 1991–2020
Green Bay weather
in December.
A freezing month with moderate precipitation: the 10th warmest and the 3rd driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a freezing month in Green Bay: daytime highs average -0.6°C and nights cool to about -7.2°C. By daytime temperature it is the 10th warmest of the 12 months.
Expect about 45 mm of precipitation on roughly 7 days, which makes December a month with moderate precipitation (the 3rd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 8 h 54 min on an average December day.
The nearest other city in this atlas is Appleton (42 km away). In December its highs average -1.1°C, about as warm as Green Bay, with 45 mm of precipitation.
Among the 498 cities listed in the United States, Green Bay ranks 486th of 498 for the warmest December highs and joint 99th of 498 for the driest December (precipitation, lowest first). The mean December high of those 498 cities is 10.5°C; Green Bay is 11.2°C cooler than that mean.
From December to January, average highs fall by 3.5°C to -4.1°C, and monthly precipitation falls from 45 mm to 37 mm.
The annual picture
December in context
Monthly precipitation
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Green Bay climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | -4.1°C-11.9°C | -11.9°C | 37 | 7.6 | 9.29 h |
| February | -2.3°C-10.8°C | -10.8°C | 33 | 6.5 | 10.410 h |
| March | 4.2°C-5.1°C | -5.1°C | 56 | 8.3 | 11.912 h |
| April | 11.3°C1.6°C | 1.6°C | 80 | 11.4 | 13.413 h |
| May | 18.5°C8.7°C | 8.7°C | 86 | 11.4 | 14.815 h |
| June | 24.1°C14.9°C | 14.9°C | 91 | 11.2 | 15.515 h |
| July | 26.7°C17.8°C | 17.8°C | 88 | 11.2 | 15.215 h |
| August | 25.6°C17.3°C | 17.3°C | 87 | 10.4 | 14.014 h |
| September | 21.5°C13.3°C | 13.3°C | 67 | 9.1 | 12.613 h |
| October | 14.0°C6.6°C | 6.6°C | 71 | 9.5 | 11.011 h |
| November | 6.1°C-0.4°C | -0.4°C | 54 | 8.2 | 9.610 h |
| December, selected | -0.6°C-7.2°C | -7.2°C | 45 | 7.3 | 8.99 h |
Precipitation (rain or snow, as water) is the average of the 30 separate monthly totals. A wet day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
December in nearby cities
- Appleton in DecemberUnited States · 42 kmHigh -1.1°C · Low -7.7°C · 45 mm precipitation
- Milwaukee in DecemberUnited States · 165 kmHigh 1.1°C · Low -3.5°C · 55 mm precipitation
- Waukesha in DecemberUnited States · 168 kmHigh 0.8°C · Low -5.7°C · 50 mm precipitation
- Madison in DecemberUnited States · 195 kmHigh -0.1°C · Low -7.4°C · 48 mm precipitation
- Racine in DecemberUnited States · 200 kmHigh 1.6°C · Low -2.6°C · 68 mm precipitation
- Kenosha in DecemberUnited States · 216 kmHigh 1.8°C · Low -2.4°C · 71 mm precipitation
- Waukegan in DecemberUnited States · 240 kmHigh 1.8°C · Low -2.4°C · 78 mm precipitation
- Grand Rapids in DecemberUnited States · 256 kmHigh 1.7°C · Low -3.8°C · 60 mm precipitation
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Green Bay) is explained once on the Green Bay year overview and on the Sources, method and limits page.