West Allis weather in December: West Allis, Wisconsin: normal highs, lows, rain and records for December
West Allis in December has a normal high of 36°F and a normal low of 21°F, a daily mean of 28°F, falling from 41°F on the 1st to 33°F by the 31st. Measurable precipitation falls on 12 days in a normal December, 2.25 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 2°C and low of −6°C, 57 mm of precipitation and 34 cm of snow in December.
- NOAA stationWest Allis
- Station IDUSC00479046
- Location43.02°N 88.00°W
- Elevation723 ft (220 m)
- From the center2 miles
- Population59,784
- Jan 31° 15°
- Feb 34° 17°
- Mar 45° 27°
- Apr 57° 37°
- May 70° 48°
- Jun 80° 58°
- Jul 85° 63°
- Aug 83° 62°
- Sep 77° 54°
- Oct 62° 42°
- Nov 48° 30°
- Dec 36° 21°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is West Allis in December?
The normal high is 36°F and the normal low 21°F, for a daily mean of 28.4°F. December is 10.5°F cooler than November and 5.6°F warmer than January. December is the 10th warmest month of the year in West Allis and the 10th wettest. Across the month the normal high falls 8°F, from 41°F on December 1 to 33°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 24°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 41%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| December 1 | 41°F | 24°F | 41% | 21% |
| December 8 | 38°F | 22°F | 41% | 20% |
| December 15 | 36°F | 21°F | 40% | 19% |
| December 22 | 35°F | 19°F | 39% | 17% |
| December 31 | 33°F | 18°F | 36% | 15% |
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 | 41°F | 24°F | 41% | 21% | 9 h 20 min |
| December 2 | 40°F | 24°F | 41% | 21% | 9 h 10 min |
| December 3 | 40°F | 24°F | 41% | 21% | 9 h 10 min |
| December 4 | 39°F | 23°F | 41% | 21% | 9 h 10 min |
| December 5 | 39°F | 23°F | 41% | 21% | 9 h 10 min |
| December 6 | 39°F | 23°F | 41% | 20% | 9 h 10 min |
| December 7 | 38°F | 23°F | 41% | 20% | 9 h 10 min |
| December 8 | 38°F | 22°F | 41% | 20% | 9 h 10 min |
| December 9 | 38°F | 22°F | 41% | 20% | 9 h 10 min |
| December 10 | 37°F | 22°F | 40% | 20% | 9 h 10 min |
| December 11 | 37°F | 22°F | 40% | 20% | 9 h |
| December 12 | 37°F | 21°F | 40% | 19% | 9 h |
| December 13 | 37°F | 21°F | 40% | 19% | 9 h |
| December 14 | 36°F | 21°F | 40% | 19% | 9 h |
| December 15 | 36°F | 21°F | 40% | 19% | 9 h |
| December 16 | 36°F | 21°F | 40% | 19% | 9 h |
| December 17 | 36°F | 20°F | 39% | 18% | 9 h |
| December 18 | 35°F | 20°F | 39% | 18% | 9 h |
| December 19 | 35°F | 20°F | 39% | 18% | 9 h |
| December 20 | 35°F | 20°F | 39% | 18% | 9 h |
| December 21 | 35°F | 20°F | 39% | 18% | 9 h |
| December 22 | 35°F | 19°F | 39% | 17% | 9 h |
| December 23 | 34°F | 19°F | 38% | 17% | 9 h |
| December 24 | 34°F | 19°F | 38% | 17% | 9 h |
| December 25 | 34°F | 19°F | 38% | 17% | 9 h |
| December 26 | 34°F | 19°F | 37% | 16% | 9 h |
| December 27 | 34°F | 18°F | 37% | 16% | 9 h |
| December 28 | 34°F | 18°F | 37% | 16% | 9 h |
| December 29 | 33°F | 18°F | 37% | 16% | 9 h |
| December 30 | 33°F | 18°F | 36% | 16% | 9 h |
| December 31 | 33°F | 18°F | 36% | 15% | 9 h |
- Normal high
- 36°FDecember average
- Normal low
- 21°FDecember average
- Precipitation
- 2.25 inmonth total
- Days with precipitation
- 120.01 inch or more
- Snowfall
- 13.3 inmonth total
- Nights at 32°F or colder
- 28
- Daylight
- 9 h 20 min to 9 hDecember 1 to December 31
- Sunshine
- 59%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00479046; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain or snow in West Allis in December?
On a given December day the chance of 0.01 inch or more is 39% on average, highest around December 1 (41%). In all, 2.25 in falls on 12 days of a normal December, 1 of them with an inch or more.
In a normal December in West Allis, 28 nights fall to freezing, 13 days stay below freezing all day and snowfall averages 13.3 inches.
Snow falls on 8 days in a normal December, and an inch or more covers the ground on 14 days.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00479046.
What are the records for December in West Allis?
The warmest December temperature on this station's record (since 1948) is 70°F, on December 6, 2001; the coldest is −21°F, on December 24, 1983. The wettest December brought 6.03 in (2008); the snowiest, 44.7 inches (2008).
The December mean against the 1991-2020 normal of 28.4°F: 2023 37.6°F (+9.3), 2024 29.9°F (+1.5), 2025 23.6°F (−4.8). 2 of 3 ran warmer than normal.
| December | Mean | Against normal | Precip. |
|---|---|---|---|
| 2023 | 37.6°F | +9.3°F | 2.29 in |
| 2024 | 29.9°F | +1.5°F | 1.12 in |
| 2025 | 23.6°F | −4.8°F | 1.86 in |
Source: records: ACIS, station USC00479046; recent months: ACIS, station USC00479046. Records and recent months use complete months only.
How does December in West Allis 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; West Allis's is 36°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.
Other months and places
- West Allis in November48°F by day, 30°F at night
- West Allis in January31°F by day, 15°F at night
- West Allis 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