Ann Arbor, MI weather in July
Expect warm, often humid weather with frequent rain in Ann Arbor in July, with highs near 84°F and lows near 60°F. Rain falls on about 12 days. It is one of the warmest months in Ann Arbor.
- Normal high
- 84°F
- Normal low
- 60°F
- Wet days
- 12
- 3.5 in total
- Muggy days
- 10
- dew point 65°F+
How July changes from start to finish
| July 1 | July 31 | |
|---|---|---|
| Normal high | 83°F | 83°F |
| Normal low | 59°F | 60°F |
| Chance of a wet day | 38% | 38% |
| Sunrise / sunset | 6:02 am / 9:15 pm | 6:26 am / 8:55 pm |
| Daylight | 15.2 h | 14.5 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Eastern Time).
A typical July day
- 6 am65°Fdew point 61°F
- 9 am75°Fdew point 63°F
- Noon81°Fdew point 62°F
- 3 pm83°Fdew point 61°F
- 6 pm81°Fdew point 61°F
- 9 pm73°Fdew point 62°F
NOAA hourly normals (local standard time) from Detroit Willow Run Airport (10 mi away); average wind 7 mph; clear or few clouds in 62% of daytime hours, mostly cloudy or overcast in 26%.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F6 of 31
- Hot dayshigh 90°F or more6 of 31
- Muggy daysdaily mean dew point 65°F or more10 of 31
- Wet daysat least 0.01 in of rain or melted snow12 of 31
- Notable rainat least 0.10 in7 of 31
- Freezing nightslow 32°F or below0 of 31
- Snow on the groundsnow depth 1 in or more0 of 31
Average days per July, counted from daily records for each year 1991-2020.
Rain in July
Normal precipitation is 3.5 in; a dry July brings about 2.4 in and a wet one about 4.7 in (25th and 75th percentiles). About 2 days bring half an inch or more, and about 1 an inch or more.
How July varies from year to year
- Warmest July, 1991-20202012: average high 91°F
- Coolest July1992: average high 77°F
- Wettest July2010: 6.8 in
- Driest July2018: 1.1 in
- Highest reading100°F (July 17, 2012)
- Lowest reading43°F (July 2, 2001)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
July compared with June and August
| June | July | August | |
|---|---|---|---|
| Normal high | 80°F | 84°F | 82°F |
| Normal low | 56°F | 60°F | 59°F |
| Wet days | 12 | 12 | 11 |
| Comfortable days | 12 | 6 | 9 |
| Daylight | 15.2 h | 14.9 h | 13.8 h |
Highs change by +4°F from June and -2°F into August.
Nearby alternatives in July
- Drier: Carmel, IN201 mi · high 83°F · 9 wet days
How Ann Arbor ranks in July
- Normal high260th warmest of 378 cities; 1st of 8 in Michigan
- Wet days304th driest of 378
- Comfortable days93rd most of 340
What to pack for Ann Arbor in July
- A rain jacket or umbrella – rain on about 12 days
- Sunglasses and sunscreen – about 14.9 hours of daylight and highs near 84°F
Heating and cooling
July has 8 heating degree days and 222 cooling degree days (base 65°F), 3% of the year's total heating and cooling demand.
Questions
How hot is Ann Arbor in July?
The normal high is 84°F and the normal low is 60°F. From 1991 to 2020 the hottest July reading was 100°F (most recently on July 17, 2012).
Does it rain a lot in Ann Arbor in July?
About 12 days in July have at least 0.01 in of precipitation, and the normal total is 3.5 in. The wettest July in 1991-2020 was in 2010 (6.8 in); the driest was in 2018 (1.1 in).
Is July a good time to visit Ann Arbor?
July ranks 7th of 12 months on our comfort score for Ann Arbor (58 out of 100). It has about 6 comfortable days and about 6 days at 90°F or hotter. The best month is May.
Where the numbers come from
- Temperature, rain, snowfall, snow depth and frost dates: Ann Arbor U Of Mich (USC00200230), 3.7 mi ENE of the city center, 813 ft (68 ft lower than the city). NOAA normals and daily records, 1991-2020.
- Humidity and wind by hour: Detroit Willow Run Airport (USW00014853), 10 mi ESE of the city center, 777 ft (104 ft lower than the city). NOAA normals and daily records, 1991-2020.
- Cloud cover: Toledo Express Airport (USW00094830), 47 mi S of the city center, 669 ft (212 ft lower than the city). NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Willow Run Airport (725376-14853), 11 mi ESE of the city center, 708 ft (173 ft lower than the city). Hourly observations, 1991-2020.