Detroit weather in September
Long-run climate averages for Detroit, MI in September, plus what the forecast models say for the days ahead.
In September, Detroit averages 73°F by day and 58°F at night. It is the wettest month of the year here.
September in Detroit averages a daytime high of 73°F and an overnight low of 58°F, which reads as warm for this part of the world. It is also the wettest month, so build rain into any plan. Across the whole year Detroit sees roughly 38 inches of precipitation.
Climate averages tell you what to pack. They do not tell you what next Tuesday looks like - for that, see the live Detroit forecast with every model compared and how much they currently agree.
Detroit weather by month
what to expect in Detroit through the year, 1991-2020 averagesHere is Detroit's typical weather in each month: the average daytime high and overnight low in °F, how each month feels, and the wettest month marked. Use it to plan any trip to Detroit by season.
Bottom line: over the last 30 days the European model has been the most accurate forecast for Detroit, scoring 94/100 on our CheckWeather Score, ahead of the American at 80. See the full US accuracy scoreboard for exactly how every model is tested.
Common questions
How warm is Detroit in September?
Is September a good time to visit Detroit?
Does it rain a lot in Detroit in September?
Climate averages from ERA5 reanalysis. Model accuracy re-scored over a rolling 30 days. Page updated .