Superior weather in December: Superior, Wisconsin: normal highs, lows, rain and records for December
Superior in December has a normal high of 27°F and a normal low of 13°F, a daily mean of 20°F, falling from 32°F on the 1st to 24°F by the 31st. Measurable precipitation falls on 7 days in a normal December, 1.29 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of −3°C and low of −10°C, 33 mm of precipitation and 31 cm of snow in December.
- NOAA stationSuperior
- Station IDUSC00478349
- Location46.73°N 92.07°W
- Elevation607 ft (185 m)
- Population26,620
- Jan 23° 6°
- Feb 27° 9°
- Mar 36° 21°
- Apr 46° 32°
- May 57° 41°
- Jun 67° 50°
- Jul 76° 58°
- Aug 75° 58°
- Sep 67° 50°
- Oct 53° 39°
- Nov 39° 26°
- Dec 27° 13°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Superior in December?
The normal high is 27°F and the normal low 13°F, for a daily mean of 20.2°F. December is 12.2°F cooler than November and 6.1°F warmer than January. December is the 10th warmest month of the year in Superior and the 10th wettest. Across the month the normal high falls 8°F, from 32°F on December 1 to 24°F on December 31. From one year to the next December's mean temperature typically moves about 5.3°F either way (NOAA's standard deviation), so roughly two Decembers in three average between 15°F and 26°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 24%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| December 1 | 32°F | 19°F | 24% | 12% |
| December 8 | 30°F | 16°F | 24% | 11% |
| December 15 | 27°F | 13°F | 23% | 11% |
| December 22 | 25°F | 11°F | 23% | 11% |
| December 31 | 24°F | 8°F | 23% | 11% |
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 | 32°F | 19°F | 24% | 12% | 8 h 50 min |
| December 2 | 32°F | 18°F | 24% | 12% | 8 h 50 min |
| December 3 | 32°F | 18°F | 24% | 12% | 8 h 50 min |
| December 4 | 31°F | 17°F | 24% | 12% | 8 h 50 min |
| December 5 | 31°F | 17°F | 24% | 12% | 8 h 50 min |
| December 6 | 30°F | 17°F | 24% | 12% | 8 h 40 min |
| December 7 | 30°F | 16°F | 24% | 11% | 8 h 40 min |
| December 8 | 30°F | 16°F | 24% | 11% | 8 h 40 min |
| December 9 | 29°F | 15°F | 23% | 11% | 8 h 40 min |
| December 10 | 29°F | 15°F | 23% | 11% | 8 h 40 min |
| December 11 | 29°F | 15°F | 23% | 11% | 8 h 40 min |
| December 12 | 28°F | 14°F | 23% | 11% | 8 h 40 min |
| December 13 | 28°F | 14°F | 23% | 11% | 8 h 40 min |
| December 14 | 28°F | 14°F | 23% | 11% | 8 h 40 min |
| December 15 | 27°F | 13°F | 23% | 11% | 8 h 30 min |
| December 16 | 27°F | 13°F | 23% | 11% | 8 h 30 min |
| December 17 | 27°F | 13°F | 23% | 11% | 8 h 30 min |
| December 18 | 26°F | 12°F | 23% | 11% | 8 h 30 min |
| December 19 | 26°F | 12°F | 23% | 11% | 8 h 30 min |
| December 20 | 26°F | 12°F | 23% | 11% | 8 h 30 min |
| December 21 | 26°F | 11°F | 23% | 11% | 8 h 30 min |
| December 22 | 25°F | 11°F | 23% | 11% | 8 h 30 min |
| December 23 | 25°F | 11°F | 23% | 11% | 8 h 30 min |
| December 24 | 25°F | 10°F | 23% | 11% | 8 h 30 min |
| December 25 | 25°F | 10°F | 23% | 11% | 8 h 30 min |
| December 26 | 25°F | 10°F | 23% | 11% | 8 h 30 min |
| December 27 | 24°F | 10°F | 23% | 11% | 8 h 30 min |
| December 28 | 24°F | 9°F | 23% | 11% | 8 h 30 min |
| December 29 | 24°F | 9°F | 23% | 11% | 8 h 30 min |
| December 30 | 24°F | 9°F | 23% | 11% | 8 h 40 min |
| December 31 | 24°F | 8°F | 23% | 11% | 8 h 40 min |
- Normal high
- 27°FDecember average
- Normal low
- 13°FDecember average
- Precipitation
- 1.29 inmonth total
- Days with precipitation
- 70.01 inch or more
- Snowfall
- 12.3 inmonth total
- Nights at 32°F or colder
- 30
- Daylight
- 8 h 50 min to 8 h 40 minDecember 1 to December 31
- Sunshine
- 60%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00478349; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain or snow in Superior in December?
On a given December day the chance of 0.01 inch or more is 23% on average, highest around December 1 (24%). In all, 1.29 in falls on 7 days of a normal December.
In a normal December in Superior, 30 nights fall to freezing, 20 days stay below freezing all day and snowfall averages 12.3 inches.
Snow falls on 6 days in a normal December, and an inch or more covers the ground on 20 days.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00478349.
What are the records for December in Superior?
The warmest December temperature on this station's record (since 1909) is 60°F, on December 1, 1962; the coldest is −32°F, on December 28, 1917. The wettest December brought 4.32 in (2019); the snowiest, 35.5 inches (1964).
The December mean against the 1991-2020 normal of 20.2°F: 2021 22.3°F (+2.1), 2022 17.1°F (−3.1), 2023 32.5°F (+12.3), 2024 23.6°F (+3.4), 2025 16.2°F (−4.0). 3 of 5 ran warmer than normal.
| December | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 22.3°F | +2.1°F | 2.25 in |
| 2022 | 17.1°F | −3.1°F | 1.40 in |
| 2023 | 32.5°F | +12.3°F | 3.17 in |
| 2024 | 23.6°F | +3.4°F | 1.51 in |
| 2025 | 16.2°F | −4.0°F | 0.90 in |
Source: records: ACIS, station USC00478349; recent months: ACIS, station USC00478349. Records and recent months use complete months only.
How does December in Superior 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; Superior's is 27°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.