Detroit weather in August: Detroit, Michigan: normal highs, lows, rain and records for August
Detroit in August has a normal high of 81°F and a normal low of 63°F, a daily mean of 72°F, falling from 83°F on the 1st to 79°F by the 31st. Measurable precipitation falls on 10 days in a normal August, 3.26 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 27°C and low of 17°C, 83 mm of precipitation in August.
- NOAA stationDetroit Metro Airport
- Station IDUSW00094847
- Location42.23°N 83.33°W
- Elevation631 ft (192 m)
- From the center16 miles
- Population645,705
- Jan 32° 19°
- Feb 35° 21°
- Mar 46° 29°
- Apr 59° 39°
- May 70° 50°
- Jun 80° 60°
- Jul 84° 64°
- Aug 81° 63°
- Sep 74° 56°
- Oct 62° 44°
- Nov 49° 34°
- Dec 37° 25°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Detroit in August?
The normal high is 81°F and the normal low 63°F, for a daily mean of 72.3°F. August is 1.8°F cooler than July and 7.4°F warmer than September. August is the 2nd warmest month of the year in Detroit and the 3rd wettest. Across the month the normal high falls 4°F, from 83°F on August 1 to 79°F on August 31. From one year to the next August's mean temperature typically moves about 2.5°F either way (NOAA's standard deviation), so roughly two Augusts in three average between 70°F and 75°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 34%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| August 1 | 83°F | 64°F | 34% | 21% |
| August 8 | 82°F | 64°F | 33% | 20% |
| August 15 | 82°F | 64°F | 32% | 20% |
| August 22 | 81°F | 63°F | 32% | 20% |
| August 31 | 79°F | 61°F | 31% | 19% |
Every day of August: normal high, low and chance of precipitation (warmest afternoon August 1, coldest night August 31)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| August 1 | 83°F | 64°F | 34% | 21% | 14 h 30 min |
| August 2 | 83°F | 64°F | 34% | 21% | 14 h 30 min |
| August 3 | 83°F | 64°F | 33% | 21% | 14 h 20 min |
| August 4 | 83°F | 64°F | 33% | 21% | 14 h 20 min |
| August 5 | 83°F | 64°F | 33% | 21% | 14 h 20 min |
| August 6 | 83°F | 64°F | 33% | 21% | 14 h 20 min |
| August 7 | 83°F | 64°F | 33% | 20% | 14 h 20 min |
| August 8 | 82°F | 64°F | 33% | 20% | 14 h 10 min |
| August 9 | 82°F | 64°F | 33% | 20% | 14 h 10 min |
| August 10 | 82°F | 64°F | 33% | 20% | 14 h 10 min |
| August 11 | 82°F | 64°F | 32% | 20% | 14 h 10 min |
| August 12 | 82°F | 64°F | 32% | 20% | 14 h |
| August 13 | 82°F | 64°F | 32% | 20% | 14 h |
| August 14 | 82°F | 64°F | 32% | 20% | 14 h |
| August 15 | 82°F | 64°F | 32% | 20% | 14 h |
| August 16 | 82°F | 64°F | 32% | 20% | 13 h 50 min |
| August 17 | 81°F | 63°F | 32% | 20% | 13 h 50 min |
| August 18 | 81°F | 63°F | 32% | 20% | 13 h 50 min |
| August 19 | 81°F | 63°F | 32% | 20% | 13 h 50 min |
| August 20 | 81°F | 63°F | 32% | 20% | 13 h 40 min |
| August 21 | 81°F | 63°F | 32% | 20% | 13 h 40 min |
| August 22 | 81°F | 63°F | 32% | 20% | 13 h 40 min |
| August 23 | 81°F | 63°F | 32% | 20% | 13 h 40 min |
| August 24 | 80°F | 62°F | 32% | 20% | 13 h 30 min |
| August 25 | 80°F | 62°F | 32% | 20% | 13 h 30 min |
| August 26 | 80°F | 62°F | 32% | 20% | 13 h 30 min |
| August 27 | 80°F | 62°F | 32% | 19% | 13 h 30 min |
| August 28 | 80°F | 62°F | 31% | 19% | 13 h 20 min |
| August 29 | 80°F | 61°F | 31% | 19% | 13 h 20 min |
| August 30 | 79°F | 61°F | 31% | 19% | 13 h 20 min |
| August 31 | 79°F | 61°F | 31% | 19% | 13 h 10 min |
- Normal high
- 81°FAugust average
- Normal low
- 63°FAugust average
- Precipitation
- 3.26 inmonth total
- Days with precipitation
- 100.01 inch or more
- Days at 90°F or more
- 3
- Daylight
- 14 h 30 min to 13 h 10 minAugust 1 to August 31
- Days at 70°F or more
- 30
- Days at 80°F or more
- 21
- Sunshine
- 78%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00094847; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Detroit in August?
On a given August day the chance of 0.01 inch or more is 32% on average, highest around August 1 (34%). In all, 3.26 in falls on 10 days of a normal August, 1 of them with an inch or more.
In a normal August in Detroit, 3 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00094847.
How humid and windy is Detroit in August?
At 3 p.m. the normal temperature is 79°F with 52% relative humidity and a dew point of 60°F; at 6 a.m. it is 63°F with 87% humidity. The wind averages 7.0 mph, most often from the southwest in the afternoon.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 63°F | 59°F | 87% | 5.0 mph | – |
| 9 a.m. | 70°F | 61°F | 73% | 7.6 mph | 42% |
| noon | 77°F | 60°F | 57% | 9.0 mph | – |
| 3 p.m. | 79°F | 60°F | 52% | 9.9 mph | – |
| 6 p.m. | 76°F | 60°F | 57% | 9.0 mph | 33% |
| 9 p.m. | 70°F | 60°F | 72% | 6.0 mph | – |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00094847. Hourly normals exist only for NOAA's first-order stations; a dash where NOAA publishes no value for that hour (the sky at some hours).
What are the records for August in Detroit?
The warmest August temperature on Detroit's official record (since 1874) is 104°F, on August 6, 1918; the coldest is 38°F, on August 29, 1982. The wettest August brought 8.33 in (1926).
The August mean against the 1991-2020 normal of 72.3°F: 2021 75.7°F (+3.4), 2022 74.4°F (+2.1), 2023 70.3°F (−2.0), 2024 73.1°F (+0.8), 2025 71.2°F (−1.1), 2026 73.4°F (+1.1). 4 of 6 ran warmer than normal.
| August | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 75.7°F | +3.4°F | 5.17 in |
| 2022 | 74.4°F | +2.1°F | 2.32 in |
| 2023 | 70.3°F | −2.0°F | 6.50 in |
| 2024 | 73.1°F | +0.8°F | 4.50 in |
| 2025 | 71.2°F | −1.1°F | 1.31 in |
| 2026 | 73.4°F | +1.1°F | 1.75 in |
Source: records: ACIS, NWS threaded record DTWthr; recent months: ACIS, station USW00094847. Records and recent months use complete months only.
How does August in Detroit compare across Michigan?
Across the 140 places PlainClimate covers in Michigan, August normal highs run from 72°F in Munising to 83°F in Morenci; Detroit's is 81°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.