Detroit Weather in September
Detroit in September averages 24°C (75°F) during the day and 14°C (57°F) at night. Keep in mind that quite a bit of rainfall is expected this month.
Rainfall in Detroit in September
This month experiences about 11 days of rain according to historical data, averaging 96 mm (3.8 in). When showers do arrive, they tend to be on the heavier side. Worth being prepared even if rain days are not that numerous.
Temperature in Detroit in September
The excellent temperature in Detroit in September makes it a solid month to visit, with 24°C (75°F) during the day and 14°C (57°F) at night. This kind of day-to-night contrast is typical for this time of year. Nights cool down to 14°C (57°F), so a light jacket or extra layer is useful once the sun goes down. On the plus side, the cooler nights make for comfortable sleeping conditions.
Sunshine in Detroit in September
The days are predominantly sunny, with an estimated total of around 232 hours of sunshine. These sun-filled days are perfect for playing sports, visiting parks, or going for a bike ride.If your ideal day consists of dry skies and pleasant temperatures, May, July and September typically offer the best circumstances for Detroit.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Detroit's climate page.
Detroit Temperature in September
Min Temperature
14°C (57°F)
Max Temperature
24°C (75°F)
Chance of Rain
37%
Precipitation
96 mm (3.8 in)
Rainy days
11 days
Humidity
72%
Sunshine
232 hours
Percentage Sunshine
61%
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Detroit typically drop from around 26°C (79°F) at the start of September to approximately 20°C (68°F) by the end. Nights are cool, with lows typically ranging from 11°C (52°F) to 17°C (63°F).
Average temperatures in September
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in September
Historical weather for Detroit in September
Browse day-by-day weather records for Detroit spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Detroit historical weather extremes in September
Our historical data for Detroit spans 1976 to 2025, revealing these weather extremes.
- The hottest September day on record in Detroit reached 36°C (97°F) (September 2, 2011).
- The lowest overnight temperature recorded in September was 1°C (34°F) (September 30, 1993).
Best Places in the United States of America in September
Find out more about the weather in the United States of America and which places have the best travel conditions in this month. See all of the United States of America in September →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in Detroit in September
Comfortable temperatures call for an easy wardrobe in September. Pack summer basics like t-shirts and shorts, but include a light jacket for cooler moments. A pair of comfortable walking shoes is essential. Expect heavy rainfall, so bring good rain protection and waterproof bags. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.What To Do in Detroit in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Detroit's climate page.
Temperature Rainfall Sunshine Humidity
See the full Detroit climate overview or explore weather in the United States of America.
