Ann Arbor weather in December: Ann Arbor, Michigan: normal highs, lows, rain and records for December
Ann Arbor in December has a normal high of 36°F and a normal low of 22°F, a daily mean of 29°F, falling from 41°F on the 1st to 33°F by the 31st. Measurable precipitation falls on 11 days in a normal December, 1.69 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 2°C and low of −6°C, 43 mm of precipitation in December.
- NOAA stationAnn Arbor Municipal Airport
- Station IDUSW00094889
- Location42.22°N 83.74°W
- Elevation839 ft (256 m)
- From the center4 miles
- Population122,925
- Jan 32° 15°
- Feb 35° 16°
- Mar 45° 25°
- Apr 59° 35°
- May 70° 46°
- Jun 79° 54°
- Jul 84° 57°
- Aug 81° 57°
- Sep 74° 48°
- Oct 62° 38°
- Nov 48° 30°
- Dec 36° 22°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Ann Arbor in December?
The normal high is 36°F and the normal low 22°F, for a daily mean of 28.9°F. December is 9.8°F cooler than November and 5.4°F warmer than January. December is the 10th warmest month of the year in Ann Arbor 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 4.5°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 37%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| December 1 | 41°F | 25°F | 36% | 14% |
| December 8 | 39°F | 23°F | 36% | 14% |
| December 15 | 36°F | 22°F | 37% | 15% |
| December 22 | 35°F | 20°F | 37% | 15% |
| December 31 | 33°F | 18°F | 37% | 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 | 25°F | 36% | 14% | 9 h 20 min |
| December 2 | 41°F | 25°F | 36% | 14% | 9 h 20 min |
| December 3 | 40°F | 25°F | 36% | 14% | 9 h 20 min |
| December 4 | 40°F | 24°F | 36% | 14% | 9 h 20 min |
| December 5 | 40°F | 24°F | 36% | 14% | 9 h 20 min |
| December 6 | 39°F | 24°F | 36% | 14% | 9 h 10 min |
| December 7 | 39°F | 24°F | 36% | 14% | 9 h 10 min |
| December 8 | 39°F | 23°F | 36% | 14% | 9 h 10 min |
| December 9 | 38°F | 23°F | 36% | 14% | 9 h 10 min |
| December 10 | 38°F | 23°F | 36% | 14% | 9 h 10 min |
| December 11 | 38°F | 23°F | 36% | 14% | 9 h 10 min |
| December 12 | 37°F | 22°F | 37% | 14% | 9 h 10 min |
| December 13 | 37°F | 22°F | 37% | 14% | 9 h 10 min |
| December 14 | 37°F | 22°F | 37% | 14% | 9 h 10 min |
| December 15 | 36°F | 22°F | 37% | 15% | 9 h 10 min |
| December 16 | 36°F | 22°F | 37% | 15% | 9 h 10 min |
| December 17 | 36°F | 21°F | 37% | 15% | 9 h 10 min |
| December 18 | 36°F | 21°F | 37% | 15% | 9 h 10 min |
| December 19 | 35°F | 21°F | 37% | 15% | 9 h 10 min |
| December 20 | 35°F | 21°F | 37% | 15% | 9 h 10 min |
| December 21 | 35°F | 20°F | 37% | 15% | 9 h 10 min |
| December 22 | 35°F | 20°F | 37% | 15% | 9 h 10 min |
| December 23 | 34°F | 20°F | 37% | 15% | 9 h 10 min |
| December 24 | 34°F | 20°F | 37% | 15% | 9 h 10 min |
| December 25 | 34°F | 19°F | 37% | 15% | 9 h 10 min |
| December 26 | 34°F | 19°F | 37% | 15% | 9 h 10 min |
| December 27 | 34°F | 19°F | 37% | 15% | 9 h 10 min |
| December 28 | 33°F | 19°F | 37% | 15% | 9 h 10 min |
| December 29 | 33°F | 19°F | 37% | 15% | 9 h 10 min |
| December 30 | 33°F | 18°F | 37% | 15% | 9 h 10 min |
| December 31 | 33°F | 18°F | 37% | 15% | 9 h 10 min |
- Normal high
- 36°FDecember average
- Normal low
- 22°FDecember average
- Precipitation
- 1.69 inmonth total
- Days with precipitation
- 110.01 inch or more
- Nights at 32°F or colder
- 27
- Daylight
- 9 h 20 min to 9 h 10 minDecember 1 to December 31
- Sunshine
- 54%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00094889; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Ann Arbor in December?
On a given December day the chance of 0.01 inch or more is 37% on average, highest around December 19 (37%). In all, 1.69 in falls on 11 days of a normal December.
In a normal December in Ann Arbor, 27 nights fall to freezing and 11 days stay below freezing all day.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00094889.
What are the records for December in Ann Arbor?
The warmest December temperature on this station's record (since 1998) is 68°F, on December 6, 1998; the coldest is −20°F, on December 28, 2017. The wettest December brought 3.60 in (2006).
The December mean against the 1991-2020 normal of 28.9°F: 2021 34.6°F (+5.7), 2022 30.9°F (+2.0), 2023 38.3°F (+9.4), 2024 30.6°F (+1.7), 2025 24.2°F (−4.7). 4 of 5 ran warmer than normal.
| December | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 34.6°F | +5.7°F | 2.75 in |
| 2022 | 30.9°F | +2.0°F | 1.76 in |
| 2023 | 38.3°F | +9.4°F | 2.13 in |
| 2024 | 30.6°F | +1.7°F | 2.98 in |
| 2025 | 24.2°F | −4.7°F | 2.06 in |
Source: records: ACIS, station USW00094889; recent months: ACIS, station USW00094889. Records and recent months use complete months only.
How does December in Ann Arbor compare across Michigan?
Across the 140 places PlainClimate covers in Michigan, December normal highs run from 26°F in Bergland to 39°F in South Haven; Ann Arbor's is 36°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.
Other months and places
- Ann Arbor in November48°F by day, 30°F at night
- Ann Arbor in January32°F by day, 15°F at night
- Ann Arbor through the yearEvery month, frost dates, records and recent years
- Michigan in DecemberThe statewide normal and the warmest and coolest places
- South Haven: Michigan's warmest Decembernormal high 39°F