Detroit in September
In September, Detroit averages 23°C (74°F) during the day and 15°C (59°F) at night, with frequent rain — about 15 days of the month see precipitation (74 mm total).
ShoulderConditions are comfortable for sightseeing without being sweltering. Plan for unsettled weather and bring rain gear.
It's peak hurricane season in Detroit during September. Travel is possible but expect storm risk, possible flight disruption, and generally lower travel insurance coverage.
How September compares to the rest of the year in Detroit
September is in the middle of the year for warmth in Detroit (4th of 12) and one of the driest months (10th of 12). Daytime temperature runs 9°C above the annual average (14°C). September runs 3°C cooler than August (27°C) and cools 7°C in October (16°C).
September sunrise & sunset in Detroit
Times shown for Detroit local time (America/Detroit), calculated for the 15th of September. They shift by a few minutes day to day across the month.
Photography light in Detroit — September
Golden-hour and blue-hour windows for the 15th of September, in Detroit's local time. Use these for soft warm light (golden) or cool architectural twilight (blue).
📅 When to book — Detroit in September
Travel writers usually only tell you when to go. Here's when to book flights and lodging for the best mix of price and availability, based on September's tier (Shoulder) and Detroit's popularity.
Crowds & pricing — September in Detroit
Detroit is in a shoulder season month — fewer crowds, slightly lower prices, and a calmer atmosphere than peak weeks. Most major sights stay open with normal hours, though a handful of seasonal restaurants or boat trips may run reduced schedules. Many regulars consider these months the best time to visit because you trade a small amount of weather reliability for a much more pleasant on-the-ground experience.
Why this tier: excellent tourism weather peak hazard season (1 active)
Sun & mosquito risk — September in Detroit
UV is a clear-sky sea-level estimate — clouds, altitude, and reflective surfaces (snow, water) shift it ±30%. Mosquito risk is climate-derived only; for current disease advisories (dengue, malaria, zika) check the CDC or WHO travel pages before your trip.
Detroit in other months
| Month | Avg high | Avg low | Rainfall | Rain days | Snow days |
|---|---|---|---|---|---|
| January | 0°C / 32°F | -7°C / 19°F | 61 mm | 17 | — |
| February | 1°C / 34°F | -7°C / 19°F | 69 mm | 16 | — |
| March | 7°C / 44°F | -2°C / 28°F | 66 mm | 16 | — |
| April | 13°C / 56°F | 3°C / 38°F | 87 mm | 19 | — |
| May | 20°C / 68°F | 11°C / 51°F | 88 mm | 17 | — |
| June | 26°C / 78°F | 16°C / 61°F | 95 mm | 17 | — |
| July | 28°C / 82°F | 19°C / 65°F | 87 mm | 18 | — |
| August | 27°C / 80°F | 18°C / 65°F | 92 mm | 18 | — |
| September | 23°C / 74°F | 15°C / 59°F | 74 mm | 15 | — |
| October | 16°C / 61°F | 9°C / 47°F | 91 mm | 17 | — |
| November | 8°C / 47°F | 1°C / 34°F | 60 mm | 15 | — |
| December | 4°C / 39°F | -2°C / 28°F | 57 mm | 15 | — |
Other cities with similar September weather
🌍 See the full ranked list of climate twins for Detroit in September →
Frequently asked questions
How hot is Detroit in September?
In September, Detroit averages a high of 23°C (74°F) and a low of 15°C (59°F) — generally mild and pleasant.
Does it rain a lot in Detroit in September?
September is quite rainy in Detroit, with about 15 rainy days on average.
Is September a good time to visit Detroit?
September is mild and pleasant but on the rainy side. It suits travelers who are comfortable with mild and pleasant weather; check the month-by-month ranking to compare it against the rest of the year.
What should I pack for Detroit in September?
Pack light layers for warm days and cooler evenings, plus a compact umbrella or rain jacket. See the full September packing list for Detroit for a complete, climate-based checklist.
Check the live 10-day forecast and sunrise/sunset.