Ann Arbor weather in January: Ann Arbor, Michigan: normal highs, lows, rain and records for January
Ann Arbor in January has a normal high of 32°F and a normal low of 15°F, a daily mean of 24°F, holding near 32°F all month. Measurable precipitation falls on 10 days in a normal January, 1.68 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 0°C and low of −9°C, 43 mm of precipitation in January.
- 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 January?
The normal high is 32°F and the normal low 15°F, for a daily mean of 23.5°F. January is 5.4°F cooler than December and 1.8°F cooler than February. January is the 12th warmest month of the year in Ann Arbor and the 11th wettest. Across the month the normal high falls 1°F, from 33°F on January 1 to 32°F on January 31. From one year to the next January's mean temperature typically moves about 5.1°F either way (NOAA's standard deviation), so roughly two Januarys in three average between 18°F and 29°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 |
|---|---|---|---|---|
| January 1 | 33°F | 18°F | 37% | 15% |
| January 8 | 32°F | 16°F | 36% | 15% |
| January 15 | 32°F | 15°F | 35% | 15% |
| January 22 | 31°F | 14°F | 33% | 14% |
| January 31 | 32°F | 14°F | 32% | 13% |
Every day of January: normal high, low and chance of precipitation (warmest afternoon January 1, coldest night January 28)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| January 1 | 33°F | 18°F | 37% | 15% | 9 h 10 min |
| January 2 | 33°F | 18°F | 36% | 15% | 9 h 10 min |
| January 3 | 33°F | 17°F | 36% | 15% | 9 h 10 min |
| January 4 | 32°F | 17°F | 36% | 15% | 9 h 10 min |
| January 5 | 32°F | 17°F | 36% | 15% | 9 h 10 min |
| January 6 | 32°F | 17°F | 36% | 15% | 9 h 10 min |
| January 7 | 32°F | 17°F | 36% | 15% | 9 h 10 min |
| January 8 | 32°F | 16°F | 36% | 15% | 9 h 20 min |
| January 9 | 32°F | 16°F | 36% | 15% | 9 h 20 min |
| January 10 | 32°F | 16°F | 36% | 15% | 9 h 20 min |
| January 11 | 32°F | 16°F | 35% | 15% | 9 h 20 min |
| January 12 | 32°F | 16°F | 35% | 15% | 9 h 20 min |
| January 13 | 32°F | 15°F | 35% | 15% | 9 h 20 min |
| January 14 | 32°F | 15°F | 35% | 15% | 9 h 20 min |
| January 15 | 32°F | 15°F | 35% | 15% | 9 h 20 min |
| January 16 | 32°F | 15°F | 34% | 14% | 9 h 30 min |
| January 17 | 32°F | 15°F | 34% | 14% | 9 h 30 min |
| January 18 | 32°F | 15°F | 34% | 14% | 9 h 30 min |
| January 19 | 32°F | 14°F | 34% | 14% | 9 h 30 min |
| January 20 | 31°F | 14°F | 34% | 14% | 9 h 30 min |
| January 21 | 31°F | 14°F | 33% | 14% | 9 h 40 min |
| January 22 | 31°F | 14°F | 33% | 14% | 9 h 40 min |
| January 23 | 31°F | 14°F | 33% | 14% | 9 h 40 min |
| January 24 | 32°F | 14°F | 33% | 14% | 9 h 40 min |
| January 25 | 32°F | 14°F | 33% | 13% | 9 h 40 min |
| January 26 | 32°F | 14°F | 33% | 13% | 9 h 40 min |
| January 27 | 32°F | 14°F | 33% | 13% | 9 h 50 min |
| January 28 | 32°F | 14°F | 33% | 13% | 9 h 50 min |
| January 29 | 32°F | 14°F | 33% | 13% | 9 h 50 min |
| January 30 | 32°F | 14°F | 32% | 13% | 9 h 50 min |
| January 31 | 32°F | 14°F | 32% | 13% | 10 h |
- Normal high
- 32°FJanuary average
- Normal low
- 15°FJanuary average
- Precipitation
- 1.68 inmonth total
- Days with precipitation
- 100.01 inch or more
- Nights at 32°F or colder
- 29
- Daylight
- 9 h 10 min to 10 hJanuary 1 to January 31
- Sunshine
- 59%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 January?
On a given January day the chance of 0.01 inch or more is 34% on average, highest around January 1 (37%). In all, 1.68 in falls on 10 days of a normal January.
In a normal January in Ann Arbor, 29 nights fall to freezing and 17 days stay below freezing all day.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00094889.
What are the records for January in Ann Arbor?
The warmest January temperature on this station's record (since 1998) is 63°F, on January 7, 2008; the coldest is −21°F, on January 24, 2026. The wettest January brought 4.34 in (2024).
The January mean against the 1991-2020 normal of 23.5°F: 2021 27.2°F (+3.7), 2022 17.4°F (−6.1), 2023 31.6°F (+8.1), 2024 26.1°F (+2.6), 2025 21.4°F (−2.1), 2026 17.9°F (−5.6). 3 of 6 ran warmer than normal.
| January | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 27.2°F | +3.7°F | 0.98 in |
| 2022 | 17.4°F | −6.1°F | 0.26 in |
| 2023 | 31.6°F | +8.1°F | 2.28 in |
| 2024 | 26.1°F | +2.6°F | 4.34 in |
| 2025 | 21.4°F | −2.1°F | 0.92 in |
| 2026 | 17.9°F | −5.6°F | 0.59 in |
Source: records: ACIS, station USW00094889; recent months: ACIS, station USW00094889. Records and recent months use complete months only.
How does January in Ann Arbor compare across Michigan?
Across the 140 places PlainClimate covers in Michigan, January normal highs run from 20°F in Ironwood to 34°F in South Haven; Ann Arbor's is 32°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.