Climate averages 1991–2020
Ann Arbor weather
in July.
A warm, moderately wet month: the warmest and the 9th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
July is a warm month in Ann Arbor: daytime highs average 27.0°C and nights cool to about 17.7°C. By daytime temperature it is the warmest month of the year.
Expect about 84 mm of rain on roughly 11 days, which makes July a moderately wet month (the 9th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 56 min on an average July day.
The nearest other city in this atlas is Canton (Michigan), United States (22 km away). In July its highs average 27.4°C, about as warm as Ann Arbor, with 83 mm of rain.
Among the 498 cities listed in the United States, Ann Arbor ranks joint 428th of 498 for the warmest July highs and joint 275th of 498 for the driest July (rainfall, lowest first). The mean July high of those 498 cities is 30.3°C; Ann Arbor is 3.3°C cooler than that mean.
From July to August, average highs fall by 1.1°C to 26.0°C, and monthly rainfall falls from 84 mm to 83 mm.
The annual picture
July 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, selected | 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 | 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
July in nearby cities
- Canton (Michigan), United States in JulyUnited States · 22 kmHigh 27.4°C · Low 18.0°C · 83 mm rain
- Westland in JulyUnited States · 28 kmHigh 27.5°C · Low 18.3°C · 83 mm rain
- Livonia in JulyUnited States · 33 kmHigh 27.6°C · Low 18.4°C · 81 mm rain
- Farmington Hills in JulyUnited States · 38 kmHigh 27.2°C · Low 18.1°C · 80 mm rain
- Dearborn in JulyUnited States · 47 kmHigh 27.5°C · Low 18.7°C · 81 mm rain
- Southfield in JulyUnited States · 48 kmHigh 27.3°C · Low 18.5°C · 80 mm rain
- Waterford in JulyUnited States · 54 kmHigh 26.8°C · Low 17.9°C · 78 mm rain
- Detroit in JulyUnited States · 57 kmHigh 27.2°C · Low 19.2°C · 78 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.