Climate averages 1991–2020
Ann Arbor weather
in October.
A mild, moderately wet month: the 6th warmest and the 6th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
October is a mild month in Ann Arbor: daytime highs average 15.3°C and nights cool to about 7.1°C. By daytime temperature it is the 6th warmest of the 12 months.
Expect about 68 mm of rain on roughly 9 days, which makes October a moderately wet month (the 6th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 06 min on an average October day.
The nearest other city in this atlas is Canton (Michigan), United States (22 km away). In October its highs average 15.6°C, about as warm as Ann Arbor, with 67 mm of rain.
Among the 498 cities listed in the United States, Ann Arbor ranks joint 439th of 498 for the warmest October highs and joint 196th of 498 for the driest October (rainfall, lowest first). The mean October high of those 498 cities is 21.4°C; Ann Arbor is 6.0°C cooler than that mean.
From October to November, average highs fall by 7.4°C to 8.0°C, and monthly rainfall falls from 68 mm to 67 mm.
The annual picture
October in context
Monthly precipitation
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Ann Arbor climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | -0.6°C-8.3°C | -8.3°C | 61 | 9.7 | 9.59 h |
| February | 1.0°C-7.9°C | -7.9°C | 53 | 8.3 | 10.511 h |
| March | 6.7°C-3.1°C | -3.1°C | 65 | 9.6 | 11.912 h |
| April | 13.5°C3.0°C | 3.0°C | 92 | 11.8 | 13.313 h |
| May | 19.8°C9.7°C | 9.7°C | 99 | 12.5 | 14.615 h |
| June | 24.8°C15.2°C | 15.2°C | 93 | 10.5 | 15.215 h |
| July | 27.0°C17.7°C | 17.7°C | 84 | 10.8 | 14.915 h |
| August | 26.0°C17.1°C | 17.1°C | 83 | 10.3 | 13.914 h |
| September | 22.3°C13.3°C | 13.3°C | 69 | 8.6 | 12.513 h |
| October, selected | 15.3°C7.1°C | 7.1°C | 68 | 9.3 | 11.111 h |
| November | 8.0°C0.8°C | 0.8°C | 67 | 9.0 | 9.810 h |
| December | 2.0°C-4.3°C | -4.3°C | 57 | 9.0 | 9.29 h |
Precipitation (rain or snow, as water) is the average of the 30 separate monthly totals. A wet day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
October in nearby cities
- Canton (Michigan), United States in OctoberUnited States · 22 kmHigh 15.6°C · Low 7.4°C · 67 mm rain
- Westland in OctoberUnited States · 28 kmHigh 15.6°C · Low 7.6°C · 67 mm rain
- Livonia in OctoberUnited States · 33 kmHigh 15.6°C · Low 7.8°C · 69 mm rain
- Farmington Hills in OctoberUnited States · 38 kmHigh 15.2°C · Low 7.5°C · 72 mm rain
- Dearborn in OctoberUnited States · 47 kmHigh 15.6°C · Low 8.0°C · 69 mm rain
- Southfield in OctoberUnited States · 48 kmHigh 15.3°C · Low 7.9°C · 71 mm rain
- Waterford in OctoberUnited States · 54 kmHigh 14.9°C · Low 7.4°C · 75 mm rain
- Detroit in OctoberUnited States · 57 kmHigh 15.3°C · Low 8.4°C · 68 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Ann Arbor) is explained once on the Ann Arbor year overview and on the Sources, method and limits page.