Green Bay, WI weather in December
December in Green Bay: cold and snowy. Highs 31°F, lows 18°F, rain or snow on about 11 days and about 13.1 in of snow. Pack for serious cold.
- Normal high
- 31°F
- Normal low
- 18°F
- Wet days
- 11
- 1.8 in total
- Snowfall
- 13.1 in
- snow on the ground 17 days
How December changes from start to finish
| December 1 | December 31 | |
|---|---|---|
| Normal high | 36°F | 27°F |
| Normal low | 23°F | 14°F |
| Chance of a wet day | 33% | 35% |
| Sunrise / sunset | 7:08 am / 4:13 pm | 7:28 am / 4:21 pm |
| Daylight | 9.1 h | 8.9 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Central Time).
A typical December day
- 6 am22°Fdew point 17°F
- 9 am24°Fdew point 18°F
- Noon28°Fdew point 20°F
- 3 pm29°Fdew point 20°F
- 6 pm26°Fdew point 19°F
- 9 pm25°Fdew point 19°F
NOAA hourly normals (local standard time) from Green Bay (5 mi away); average wind 9 mph; clear or few clouds in 42% of daytime hours, mostly cloudy or overcast in 55%.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F0 of 31
- Beach dayshigh 80-95°F, under 0.05 in of rain, afternoon wind under 15 mph0 of 31
- Hot dayshigh 90°F or more0 of 31
- Muggy daysdaily mean dew point 65°F or more0 of 31
- Wet daysat least 0.01 in of rain or melted snow11 of 31
- Notable rainat least 0.10 in5 of 31
- Freezing nightslow 32°F or below28 of 31
- Snow on the groundsnow depth 1 in or more17 of 31
Average days per December, counted from daily records for each year 1991-2020.
Rain and snow in December
Normal precipitation is 1.8 in; a dry December brings about 1.1 in and a wet one about 2.3 in (25th and 75th percentiles). About 1 day brings half an inch or more. Normal snowfall is 13.1 in, with about 4 days of an inch or more.
How December varies from year to year
- Warmest December, 1991-20202015: average high 40°F
- Coolest December2000: average high 21°F
- Wettest December2015: 5.7 in
- Driest December1998: 0.3 in
- Highest reading64°F (December 5, 2001)
- Lowest reading-22°F (December 25, 2000)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
December compared with November and January
| November | December | January | |
|---|---|---|---|
| Normal high | 44°F | 31°F | 26°F |
| Normal low | 29°F | 18°F | 11°F |
| Wet days | 10 | 11 | 11 |
| Comfortable days | 1 | 0 | 0 |
| Daylight | 9.6 h | 8.9 h | 9.3 h |
Highs change by -13°F from November and -5°F into January.
Nearby alternatives in December
- Warmer: Milwaukee, WI102 mi · high 36°F · 10 wet days
How Green Bay ranks in December
- Normal high357th warmest of 378 cities; 5th of 5 in Wisconsin
- Wet days249th driest of 378
- Comfortable days335th most of 340
What to pack for Green Bay in December
- A warm jacket – lows near 18°F, highs near 31°F
- A rain jacket or umbrella – rain or snow on about 11 days
- Waterproof boots – snow on the ground on about 17 days
- A hat and gloves – about 28 freezing nights
Heating and cooling
December has 1254 heating degree days and 0 cooling degree days (base 65°F), 16% of the year's total heating and cooling demand.
Questions
How cold is Green Bay in December?
The normal high is 31°F and the normal low is 18°F. From 1991 to 2020 the coldest December reading was -22°F (most recently on December 25, 2000).
Does it rain a lot in Green Bay in December?
About 11 days in December have at least 0.01 in of precipitation, and the normal total is 1.8 in. The wettest December in 1991-2020 was in 2015 (5.7 in); the driest was in 1998 (0.3 in).
Does it snow in Green Bay in December?
Yes. Normal snowfall in December is 13.1 in, and snow covers the ground on about 17 days.
Is December a good time to visit Green Bay?
December ranks 11th of 12 months on our comfort score for Green Bay (25 out of 100). It has almost no comfortable days. The best months are May, June and September.
Where the numbers come from
- Temperature, rain, snowfall, snow depth, frost dates, humidity and wind by hour and cloud cover: Green Bay (USW00014898), 4.7 mi WSW of the city center, 682 ft (89 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Austin Straubel International Airport (726450-14898), 6.4 mi WSW of the city center, 684 ft (91 ft higher than the city). Hourly observations, 1991-2020.