Detroit, MI weather in July
Detroit is warm in July, with frequent rain: highs average 84°F and nights drop to about 65°F. Expect about 11 wet days. This is the peak of the warm season in Detroit.
- Normal high
- 84°F
- Normal low
- 65°F
- Wet days
- 11
- 3.5 in total
- Muggy days
- 9
- dew point 65°F+
How July changes from start to finish
| July 1 | July 31 | |
|---|---|---|
| Normal high | 83°F | 83°F |
| Normal low | 64°F | 65°F |
| Chance of a wet day | 34% | 34% |
| Sunrise / sunset | 5:59 am / 9:12 pm | 6:23 am / 8:53 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 am67°Fdew point 61°F
- 9 am75°Fdew point 61°F
- Noon80°Fdew point 61°F
- 3 pm82°Fdew point 60°F
- 6 pm80°Fdew point 60°F
- 9 pm75°Fdew point 61°F
NOAA hourly normals (local standard time) from Detroit City Airport (6 mi away); average wind 7 mph; clear or few clouds in 49% of daytime hours, mostly cloudy or overcast in 30%.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F6 of 31
- Beach dayshigh 80-95°F, under 0.05 in of rain, afternoon wind under 15 mph16 of 31
- Hot dayshigh 90°F or more6 of 31
- Muggy daysdaily mean dew point 65°F or more9 of 31
- Wet daysat least 0.01 in of rain or melted snow11 of 31
- Notable rainat least 0.10 in6 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 2.5 in and a wet one about 4.3 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, 1991-20202011: average high 89°F
- Coolest July1992: average high 78°F
- Wettest July2011: 7.7 in
- Driest July2001: 1.2 in
- Highest reading103°F (July 14, 1995)
- Lowest reading49°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 | 79°F | 84°F | 81°F |
| Normal low | 60°F | 65°F | 64°F |
| Wet days | 11 | 11 | 10 |
| Comfortable days | 12 | 6 | 9 |
| Daylight | 15.2 h | 14.9 h | 13.8 h |
Highs change by +5°F from June and -3°F into August.
How Detroit ranks in July
- Normal high265th warmest of 378 cities; 3rd of 8 in Michigan
- Wet days246th driest of 378
- Comfortable days94th most of 340
What to pack for Detroit in July
- A rain jacket or umbrella – rain on about 11 days
- A swimsuit – about 16 beach days
- Sunglasses and sunscreen – about 14.9 hours of daylight and highs near 84°F
Heating and cooling
July has 2 heating degree days and 287 cooling degree days (base 65°F), 4% of the year's total heating and cooling demand.
Questions
How hot is Detroit in July?
The normal high is 84°F and the normal low is 65°F. From 1991 to 2020 the hottest July reading was 103°F (July 14, 1995).
Does it rain a lot in Detroit in July?
About 11 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 2011 (7.7 in); the driest was in 2001 (1.2 in).
Is July a good time to visit Detroit?
July ranks 5th of 12 months on our comfort score for Detroit (59 out of 100). It has about 6 comfortable days and about 6 days at 90°F or hotter. The best months are May, June and September.
Where the numbers come from
- Temperature, frost dates and humidity and wind by hour: Detroit City Airport (USW00014822), 5.7 mi NNE of the city center, 626 ft . NOAA normals and daily records, 1991-2020.
- Rain, snowfall and snow depth: Detroit Metro Airport (USW00094847), 16 mi WSW of the city center, 631 ft . NOAA normals and daily records, 1991-2020.
- Cloud cover: Flint Bishop Intl Airport (USW00014826), 57 mi NW of the city center, 770 ft (172 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Detroit City Airport (725375-14822), 5.5 mi NNE of the city center, 623 ft . Hourly observations, 1991-2020.