Ann Arbor weather in October: Ann Arbor, Michigan: normal highs, lows, rain and records for October
Ann Arbor in October has a normal high of 62°F and a normal low of 38°F, a daily mean of 50°F, falling from 68°F on the 1st to 55°F by the 31st. Measurable precipitation falls on 12 days in a normal October, 2.22 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 16°C and low of 3°C, 56 mm of precipitation in October.
- 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 October?
The normal high is 62°F and the normal low 38°F, for a daily mean of 49.9°F. October is 11.4°F cooler than September and 11.2°F warmer than November. October is the 6th warmest month of the year in Ann Arbor and the 7th wettest. Across the month the normal high falls 13°F, from 68°F on October 1 to 55°F on October 31. From one year to the next October's mean temperature typically moves about 2.3°F either way (NOAA's standard deviation), so roughly two Octobers in three average between 48°F and 52°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 39%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| October 1 | 68°F | 43°F | 39% | 18% |
| October 8 | 65°F | 41°F | 38% | 18% |
| October 15 | 62°F | 39°F | 38% | 18% |
| October 22 | 59°F | 37°F | 37% | 17% |
| October 31 | 55°F | 34°F | 35% | 16% |
Every day of October: normal high, low and chance of precipitation (warmest afternoon October 1, coldest night October 31)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| October 1 | 68°F | 43°F | 39% | 18% | 11 h 50 min |
| October 2 | 68°F | 43°F | 39% | 18% | 11 h 50 min |
| October 3 | 67°F | 42°F | 39% | 18% | 11 h 40 min |
| October 4 | 67°F | 42°F | 39% | 18% | 11 h 40 min |
| October 5 | 67°F | 42°F | 39% | 18% | 11 h 40 min |
| October 6 | 66°F | 41°F | 39% | 18% | 11 h 30 min |
| October 7 | 66°F | 41°F | 38% | 18% | 11 h 30 min |
| October 8 | 65°F | 41°F | 38% | 18% | 11 h 30 min |
| October 9 | 65°F | 40°F | 38% | 18% | 11 h 30 min |
| October 10 | 64°F | 40°F | 38% | 18% | 11 h 20 min |
| October 11 | 64°F | 40°F | 38% | 18% | 11 h 20 min |
| October 12 | 63°F | 39°F | 38% | 18% | 11 h 20 min |
| October 13 | 63°F | 39°F | 38% | 18% | 11 h 10 min |
| October 14 | 62°F | 39°F | 38% | 18% | 11 h 10 min |
| October 15 | 62°F | 39°F | 38% | 18% | 11 h 10 min |
| October 16 | 62°F | 38°F | 38% | 18% | 11 h 10 min |
| October 17 | 61°F | 38°F | 38% | 18% | 11 h |
| October 18 | 61°F | 38°F | 37% | 18% | 11 h |
| October 19 | 60°F | 37°F | 37% | 17% | 11 h |
| October 20 | 60°F | 37°F | 37% | 17% | 11 h |
| October 21 | 59°F | 37°F | 37% | 17% | 10 h 50 min |
| October 22 | 59°F | 37°F | 37% | 17% | 10 h 50 min |
| October 23 | 58°F | 36°F | 37% | 17% | 10 h 50 min |
| October 24 | 58°F | 36°F | 37% | 17% | 10 h 40 min |
| October 25 | 58°F | 36°F | 36% | 17% | 10 h 40 min |
| October 26 | 57°F | 35°F | 36% | 16% | 10 h 40 min |
| October 27 | 57°F | 35°F | 36% | 16% | 10 h 40 min |
| October 28 | 56°F | 35°F | 36% | 16% | 10 h 30 min |
| October 29 | 56°F | 35°F | 35% | 16% | 10 h 30 min |
| October 30 | 55°F | 34°F | 35% | 16% | 10 h 30 min |
| October 31 | 55°F | 34°F | 35% | 16% | 10 h 30 min |
- Normal high
- 62°FOctober average
- Normal low
- 38°FOctober average
- Precipitation
- 2.22 inmonth total
- Days with precipitation
- 120.01 inch or more
- Nights at 32°F or colder
- 10
- Daylight
- 11 h 50 min to 10 h 30 minOctober 1 to October 31
- Days at 70°F or more
- 7
- Days at 80°F or more
- 1
- Sunshine
- 68%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 October?
On a given October day the chance of 0.01 inch or more is 37% on average, highest around October 1 (39%). In all, 2.22 in falls on 12 days of a normal October, 1 of them with an inch or more.
In a normal October in Ann Arbor, 10 nights fall to freezing.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00094889.
What are the records for October in Ann Arbor?
The warmest October temperature on this station's record (since 1998) is 89°F, on October 8, 2007; the coldest is 17°F, on October 30, 2008. The wettest October brought 6.47 in (2001).
The October mean against the 1991-2020 normal of 49.9°F: 2021 56.4°F (+6.5), 2022 49.0°F (−0.9), 2023 51.7°F (+1.8), 2024 52.4°F (+2.5), 2025 52.1°F (+2.2). 4 of 5 ran warmer than normal.
| October | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 56.4°F | +6.5°F | 3.37 in |
| 2022 | 49.0°F | −0.9°F | 0.92 in |
| 2023 | 51.7°F | +1.8°F | 1.47 in |
| 2024 | 52.4°F | +2.5°F | 1.33 in |
| 2025 | 52.1°F | +2.2°F | 1.51 in |
Source: records: ACIS, station USW00094889; recent months: ACIS, station USW00094889. Records and recent months use complete months only.
How does October in Ann Arbor compare across Michigan?
Across the 140 places PlainClimate covers in Michigan, October normal highs run from 52°F in Hancock to 64°F in Eau Claire; Ann Arbor's is 62°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.