Green Bay weather in December: Green Bay, Wisconsin: normal highs, lows, rain and records for December
Green Bay in December has a normal high of 31°F and a normal low of 18°F, a daily mean of 25°F, falling from 36°F on the 1st to 27°F by the 31st. Measurable precipitation falls on 11 days in a normal December, 1.75 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 0°C and low of −8°C, 44 mm of precipitation and 33 cm of snow in December.
- NOAA stationGreen Bay A S International Airport
- Station IDUSW00014898
- Location44.50°N 88.11°W
- Elevation682 ft (208 m)
- From the center6 miles
- Population106,311
- Jan 26° 11°
- Feb 29° 13°
- Mar 40° 24°
- Apr 54° 35°
- May 67° 46°
- Jun 77° 56°
- Jul 81° 60°
- Aug 79° 58°
- Sep 72° 50°
- Oct 58° 40°
- Nov 44° 29°
- Dec 31° 18°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Green Bay in December?
The normal high is 31°F and the normal low 18°F, for a daily mean of 24.5°F. December is 11.7°F cooler than November and 6.2°F warmer than January. December is the 10th warmest month of the year in Green Bay and the 10th wettest. Across the month the normal high falls 9°F, from 36°F on December 1 to 27°F on December 31. From one year to the next December's mean temperature typically moves about 5.2°F either way (NOAA's standard deviation), so roughly two Decembers in three average between 19°F and 30°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 35%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| December 1 | 36°F | 23°F | 33% | 16% |
| December 8 | 34°F | 20°F | 34% | 15% |
| December 15 | 31°F | 18°F | 34% | 15% |
| December 22 | 29°F | 16°F | 34% | 15% |
| December 31 | 27°F | 14°F | 35% | 14% |
Every day of December: normal high, low and chance of precipitation (warmest afternoon December 1, coldest night December 31)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| December 1 | 36°F | 23°F | 33% | 16% | 9 h 10 min |
| December 2 | 36°F | 23°F | 33% | 16% | 9 h 10 min |
| December 3 | 36°F | 22°F | 33% | 16% | 9 h |
| December 4 | 35°F | 22°F | 33% | 15% | 9 h |
| December 5 | 35°F | 22°F | 33% | 15% | 9 h |
| December 6 | 34°F | 21°F | 34% | 15% | 9 h |
| December 7 | 34°F | 21°F | 34% | 15% | 9 h |
| December 8 | 34°F | 20°F | 34% | 15% | 9 h |
| December 9 | 33°F | 20°F | 34% | 15% | 9 h |
| December 10 | 33°F | 20°F | 34% | 15% | 9 h |
| December 11 | 32°F | 19°F | 34% | 15% | 8 h 50 min |
| December 12 | 32°F | 19°F | 34% | 15% | 8 h 50 min |
| December 13 | 32°F | 19°F | 34% | 15% | 8 h 50 min |
| December 14 | 31°F | 18°F | 34% | 15% | 8 h 50 min |
| December 15 | 31°F | 18°F | 34% | 15% | 8 h 50 min |
| December 16 | 31°F | 18°F | 34% | 15% | 8 h 50 min |
| December 17 | 31°F | 18°F | 34% | 15% | 8 h 50 min |
| December 18 | 30°F | 17°F | 34% | 15% | 8 h 50 min |
| December 19 | 30°F | 17°F | 34% | 15% | 8 h 50 min |
| December 20 | 30°F | 17°F | 34% | 15% | 8 h 50 min |
| December 21 | 29°F | 16°F | 34% | 15% | 8 h 50 min |
| December 22 | 29°F | 16°F | 34% | 15% | 8 h 50 min |
| December 23 | 29°F | 16°F | 34% | 15% | 8 h 50 min |
| December 24 | 29°F | 16°F | 34% | 15% | 8 h 50 min |
| December 25 | 28°F | 15°F | 34% | 14% | 8 h 50 min |
| December 26 | 28°F | 15°F | 34% | 14% | 8 h 50 min |
| December 27 | 28°F | 15°F | 34% | 14% | 8 h 50 min |
| December 28 | 28°F | 15°F | 35% | 14% | 8 h 50 min |
| December 29 | 28°F | 14°F | 35% | 14% | 8 h 50 min |
| December 30 | 27°F | 14°F | 35% | 14% | 8 h 50 min |
| December 31 | 27°F | 14°F | 35% | 14% | 8 h 50 min |
- Normal high
- 31°FDecember average
- Normal low
- 18°FDecember average
- Precipitation
- 1.75 inmonth total
- Days with precipitation
- 110.01 inch or more
- Snowfall
- 13.1 inmonth total
- Nights at 32°F or colder
- 28
- Daylight
- 9 h 10 min to 8 h 50 minDecember 1 to December 31
- Sunshine
- 58%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00014898; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain or snow in Green Bay in December?
On a given December day the chance of 0.01 inch or more is 34% on average, highest around December 31 (35%). In all, 1.75 in falls on 11 days of a normal December.
In a normal December in Green Bay, 28 nights fall to freezing, 15 days stay below freezing all day and snowfall averages 13.1 inches.
Snow falls on 9 days in a normal December, and an inch or more covers the ground on 17 days.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00014898.
How humid and windy is Green Bay in December?
At 3 p.m. the normal temperature is 25°F with 69% relative humidity and a dew point of 16°F; at 6 a.m. it is 19°F with 80% humidity. The wind averages 9.3 mph, most often from the west in the afternoon. A dew point under 50°F feels dry.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 19°F | 13°F | 80% | 8.6 mph | 39% |
| 9 a.m. | 20°F | 14°F | 79% | 9.5 mph | 38% |
| noon | 24°F | 16°F | 71% | 11.0 mph | 42% |
| 3 p.m. | 25°F | 16°F | 69% | 10.5 mph | 44% |
| 6 p.m. | 23°F | 15°F | 73% | 8.7 mph | 41% |
| 9 p.m. | 21°F | 15°F | 76% | 8.9 mph | 42% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00014898. Hourly normals exist only for NOAA's first-order stations; a dash where NOAA publishes no value for that hour (the sky at some hours).
What are the records for December in Green Bay?
The warmest December temperature on Green Bay's official record (since 1886) is 65°F, on December 16, 2021; the coldest is −27°F, on December 19, 1983. The wettest December brought 5.71 in (2015); the snowiest, 45.6 inches (2008).
The December mean against the 1991-2020 normal of 24.5°F: 2021 28.2°F (+3.7), 2022 24.4°F (−0.1), 2023 34.9°F (+10.4), 2024 26.8°F (+2.3), 2025 19.0°F (−5.5). 3 of 5 ran warmer than normal.
| December | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 28.2°F | +3.7°F | 2.01 in |
| 2022 | 24.4°F | −0.1°F | 1.79 in |
| 2023 | 34.9°F | +10.4°F | 1.31 in |
| 2024 | 26.8°F | +2.3°F | 1.18 in |
| 2025 | 19.0°F | −5.5°F | 1.80 in |
Source: records: ACIS, NWS threaded record GRBthr; recent months: ACIS, station USW00014898. Records and recent months use complete months only.
How does December in Green Bay compare across Wisconsin?
Across the 165 places PlainClimate covers in Wisconsin, December normal highs run from 24°F in Drummond to 37°F in Kenosha; Green Bay's is 31°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.