Weather in Detroit in August 2025
Average weather
Average temperature in Detroit in August
The temperature in August is +79°F on average, with a range between a maximum of +88°F during the day and a minimum of +52°F at night.
The average maximum temperature goes down 15% by the end of the month, compared with the beginning of the month, from +79°F to +73°F.
Is Detroit warm or cold in August?
Detroit is typically warm in August.
Maximum temperatures go down compared to the previous month from +82°F to +81°F. The minimum temperature also goes down from +66°F to +64°F.
It’s generally warm, but pack a long-sleeve shirt for evenings.
August is one of the warmest months in Detroit, here is the comparison with other months:
Water temperature in Detroit in August
Water in Detroit in August is Comfortable. It varies from +71°F to +77°F, with an average of +74°F. This is almost similar to the air temperature, which averages +81°F.
The water temperature in August is one of the warmest of the entire year:
Can you swim in Detroit in August?
Climate in Detroit in August
| July | August | September | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +82°F | +81°F | +73°F | ||||
| Min. temperature | ||||||
| +50°F | +43°F | +34°F | ||||
| Max. temperature | ||||||
| +100°F | +99°F | +95°F | ||||
| Rainfall | ||||||
| 96 mm | 114 mm | 80 mm | ||||
| Wind | ||||||
| 3 m/s | 3 m/s | 3 m/s | ||||
| Avg. water temperature | ||||||
| +72°F | +74°F | +69°F | ||||
| Humidity | ||||||
| 66% | 71% | 72% | ||||
| Air pressure | ||||||
| 1014 HPa | 1015 HPa | 1016 HPa | ||||
| Sunny days | ||||||
| 8 | 8 | 9 | ||||
| Cloudy days | ||||||
| 6 | 7 | 7 | ||||
| Rainy days | ||||||
| 12 | 12 | 11 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
August weather is still as good as in July. It’s getting colder in August. From +82°F in the day, the average maximum temperature lowers to +81°F. Prepare for more rain. Average rainfall goes from 96 mm to 114 mm. Humidity rises from 66% to 71%. The average wind speed doesn’t change much during August, staying around 3 m/s. The amount of sunny days stay about the same, averaging 8 sunny days during the month.
September brings much the same weather, it remains good.
Wind
The average wind speed is 3 m/s getting up to 5 m/s which is a light breeze; barely moving the tree leaves.
The average wind speed in Detroit is gradually increasing during August, going from 2 m/s to 2 m/s over the course of the month.
Rain
How was the weather last August in Detroit?
Climate Change Over the Years
The climate in Detroit in August has not changed that much over the last 43 years.
The average temperature was the lowest in 1992 (+56°F) and the highest in 1998 (+62°F). The driest year was 1999 with only 460 mm of rainfall, and the wettest year was 2023 with 1977 mm.
FAQ
Is August a good time to visit Detroit?
Can you sunbathe in Detroit in August?
Can you swim in Detroit in August?
Is Detroit rainy in August?
Is it sunny in Detroit in August?
Other cities in USA
Monthly weather in Detroit
Source of the data
For this page, we’ve looked at the typical weather in Detroit, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.