Lake Geneva weather in December: Lake Geneva, Wisconsin: normal highs, lows, rain and records for December
Lake Geneva in December has a normal high of 35°F and a normal low of 21°F, a daily mean of 28°F, falling from 40°F on the 1st to 31°F by the 31st. Measurable precipitation falls on 11 days in a normal December, 2.31 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 2°C and low of −6°C, 59 mm of precipitation and 18 cm of snow in December.
- NOAA stationLake Geneva Wastewater Treatment Plant
- Station IDUSC00474457
- Location42.60°N 88.43°W
- Elevation846 ft (258 m)
- Population8,691
- Jan 30° 15°
- Feb 35° 17°
- Mar 45° 26°
- Apr 59° 37°
- May 72° 48°
- Jun 81° 58°
- Jul 86° 63°
- Aug 83° 61°
- Sep 76° 54°
- Oct 63° 42°
- Nov 47° 31°
- Dec 35° 21°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Lake Geneva in December?
The normal high is 35°F and the normal low 21°F, for a daily mean of 27.8°F. December is 11.3°F cooler than November and 5.2°F warmer than January. December is the 10th warmest month of the year in Lake Geneva and the 9th wettest. Across the month the normal high falls 9°F, from 40°F on December 1 to 31°F on December 31. From one year to the next December's mean temperature typically moves about 4.8°F either way (NOAA's standard deviation), so roughly two Decembers in three average between 23°F and 33°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 38%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| December 1 | 40°F | 25°F | 35% | 18% |
| December 8 | 37°F | 22°F | 35% | 16% |
| December 15 | 35°F | 21°F | 35% | 15% |
| December 22 | 33°F | 19°F | 36% | 14% |
| December 31 | 31°F | 17°F | 38% | 16% |
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 | 40°F | 25°F | 35% | 18% | 9 h 20 min |
| December 2 | 40°F | 24°F | 35% | 17% | 9 h 20 min |
| December 3 | 39°F | 24°F | 35% | 17% | 9 h 20 min |
| December 4 | 39°F | 24°F | 35% | 17% | 9 h 10 min |
| December 5 | 38°F | 23°F | 35% | 17% | 9 h 10 min |
| December 6 | 38°F | 23°F | 35% | 16% | 9 h 10 min |
| December 7 | 38°F | 23°F | 35% | 16% | 9 h 10 min |
| December 8 | 37°F | 22°F | 35% | 16% | 9 h 10 min |
| December 9 | 37°F | 22°F | 35% | 16% | 9 h 10 min |
| December 10 | 37°F | 22°F | 35% | 16% | 9 h 10 min |
| December 11 | 36°F | 22°F | 35% | 15% | 9 h 10 min |
| December 12 | 36°F | 21°F | 35% | 15% | 9 h 10 min |
| December 13 | 36°F | 21°F | 35% | 15% | 9 h 10 min |
| December 14 | 35°F | 21°F | 35% | 15% | 9 h 10 min |
| December 15 | 35°F | 21°F | 35% | 15% | 9 h |
| December 16 | 35°F | 20°F | 35% | 15% | 9 h |
| December 17 | 35°F | 20°F | 35% | 15% | 9 h |
| December 18 | 34°F | 20°F | 35% | 15% | 9 h |
| December 19 | 34°F | 20°F | 35% | 14% | 9 h |
| December 20 | 34°F | 19°F | 36% | 14% | 9 h |
| December 21 | 34°F | 19°F | 36% | 14% | 9 h |
| December 22 | 33°F | 19°F | 36% | 14% | 9 h |
| December 23 | 33°F | 19°F | 36% | 14% | 9 h |
| December 24 | 33°F | 19°F | 36% | 15% | 9 h |
| December 25 | 33°F | 18°F | 37% | 15% | 9 h |
| December 26 | 32°F | 18°F | 37% | 15% | 9 h |
| December 27 | 32°F | 18°F | 37% | 15% | 9 h |
| December 28 | 32°F | 18°F | 37% | 15% | 9 h |
| December 29 | 32°F | 18°F | 38% | 15% | 9 h |
| December 30 | 32°F | 18°F | 38% | 15% | 9 h 10 min |
| December 31 | 31°F | 17°F | 38% | 16% | 9 h 10 min |
- Normal high
- 35°FDecember average
- Normal low
- 21°FDecember average
- Precipitation
- 2.31 inmonth total
- Days with precipitation
- 110.01 inch or more
- Snowfall
- 7.1 inmonth total
- Nights at 32°F or colder
- 27
- Daylight
- 9 h 20 min to 9 h 10 minDecember 1 to December 31
- Sunshine
- 61%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00474457; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain or snow in Lake Geneva in December?
On a given December day the chance of 0.01 inch or more is 36% on average, highest around December 31 (38%). In all, 2.31 in falls on 11 days of a normal December.
In a normal December in Lake Geneva, 27 nights fall to freezing, 12 days stay below freezing all day and snowfall averages 7.1 inches.
Snow falls on 7 days in a normal December, and an inch or more covers the ground on 12 days.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00474457.
What are the records for December in Lake Geneva?
The warmest December temperature on this station's record (since 1945) is 67°F, on December 5, 2001; the coldest is −23°F, on December 24, 1983. The wettest December brought 4.97 in (1982); the snowiest, 37.0 inches (2000).
The December mean against the 1991-2020 normal of 27.8°F: 2022 24.1°F (−3.7), 2023 34.7°F (+6.9), 2024 27.4°F (−0.4), 2025 22.3°F (−5.5). 1 of 4 ran warmer than normal.
| December | Mean | Against normal | Precip. |
|---|---|---|---|
| 2022 | 24.1°F | −3.7°F | 2.02 in |
| 2023 | 34.7°F | +6.9°F | 2.42 in |
| 2024 | 27.4°F | −0.4°F | 1.08 in |
| 2025 | 22.3°F | −5.5°F | 2.03 in |
Source: records: ACIS, station USC00474457; recent months: ACIS, station USC00474457. Records and recent months use complete months only.
How does December in Lake Geneva 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; Lake Geneva's is 35°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.
Other months and places
- Lake Geneva in November47°F by day, 31°F at night
- Lake Geneva in January30°F by day, 15°F at night
- Lake Geneva through the yearEvery month, frost dates, records and recent years
- Wisconsin in DecemberThe statewide normal and the warmest and coolest places
- Kenosha: Wisconsin's warmest Decembernormal high 37°F