Detroit, MI

Michigan · Records since 1874–2026

☀️ 80°F
Currently in Detroit
As of 2:45 PM

Records for September 7

🔥 Record High

97°F

September 7, 1939

+20° from 77° normal

❄ Record Low

43°F

September 7, 1986

-16° from 59° normal
🌞 Normal high: 77°F 🌑 Normal low: 59°F 1991–2020 normals

All-Time Records — Detroit

🔥
105°F
Hottest Day Ever
Jul 24, 1934
❄
-21°F
Coldest Day Ever
Jan 21, 1984
🌧
4.74"
Wettest Day Ever
Jul 31, 1925
☃
24.1"
Most Snow in One Day
Apr 6, 1886

Top 10 Record Highs — September 7

# Temp Date
🏆 97°F September 7, 1939
2 95°F September 7, 1899
3 94°F September 7, 1978
4 92°F September 7, 2015
5 92°F September 7, 2001
6 92°F September 7, 1945
7 92°F September 7, 1881
8 91°F September 7, 1985
9 91°F September 7, 1960
10 90°F September 7, 2016

Top 5 Record Lows — September 7

# Temp Date
🥶 43°F September 7, 1986
2 44°F September 7, 1968
3 45°F September 7, 2025
4 45°F September 7, 1988
5 46°F September 7, 1962
About this data — Records are sourced from the NOAA Threadex dataset via RCC ACIS, a quality-controlled record for long-term climate stations. Threadex adjusts for station relocations and observation-time changes, making records comparable across all years since 1874–2026. Climate normals represent the 1991–2020 average.

Heat Wave Summary — Detroit

threshold: 90°F (90th percentile of historical Jun–Aug highs)
4.0
Avg heat wave length
days (historical)
95°
Avg peak temp
during heat waves
24
Dangerous nights 2026
Overnights ≥ 70°F
2
Heat waves 2026
so far

2026 Daily High Temperature vs Normal

Year to date
Above normal Below normal

129 of 249 days with data were above the 1991–2020 normal high for their date.

Days ≥ 90°F Per Year

1874–2026
12
2026 so far
12
Avg/year 1970–2025
14
Avg/year (last 10 complete)
39
Most in a year (1988)

Average Daily High by Decade

Full year · complete decades only

Longest Heat Waves — Detroit

# Dates Days Peak Avg High Avg Overnight Low
🏆 Aug 25, 1953 – Sep 4, 1953 11 100°F (Sep 2) 96°F 69°F
2 Jul 14, 1977 – Jul 21, 1977 8 102°F (Jul 15) 95°F 69°F
3 Jul 24, 1941 – Jul 31, 1941 8 100°F (Jul 27) 95°F 73°F
4 Jul 19, 1940 – Jul 26, 1940 8 99°F (Jul 25) 96°F 73°F
5 Aug 9, 1944 – Aug 16, 1944 8 99°F (Aug 11) 96°F 70°F
6 Jul 2, 2020 – Jul 9, 2020 8 95°F (Jul 7) 92°F 70°F
7 Jul 18, 1987 – Jul 25, 1987 8 93°F (Jul 20) 92°F 70°F
8 Jul 8, 1936 – Jul 14, 1936 7 104°F (Jul 8) 102°F 74°F
9 Jul 17, 2011 – Jul 23, 2011 7 100°F (Jul 21) 95°F 74°F
10 Jun 15, 1994 – Jun 21, 1994 7 99°F (Jun 17) 94°F 73°F

Heat Waves Per Year

Warm Summer Nights (Jun–Aug)

Nights where the overnight low exceeded the 1991–2020 normal low

49
2026 total
above-normal nights
38.2
Avg / summer
1970–2020
64
Most in a summer
2016

Above-Normal Summer Nights Per Year

Average June–August Low by Decade

Overnight lows · complete decades only

Precipitation

Actual vs. 1991–2020 full-month and full-season normals

20.51"
2026 YTD
Normal: 24.42"
-3.91"
1.75"
September so far
September normal: 3.22"
-1.47"
2
2026 heavy rain days
Days with ≥ 1.0"

2026 Accumulation vs. Normal

Running total since Jan 1 against the normal pace for the same date · Detroit is 3.91" behind the normal pace

Monthly Precipitation — Last 24 Months

Blue = actual · dashed line = monthly normal

Annual Precipitation Per Year (1874–2026)

Blue = above average · tan = below average · gold = 2026 (partial)
Since 1874, annual totals have trended +0.15" per decade, about +2.3" across the record.

Heavy Rain Days Per Year (≥ 1.0")

Compare year-to-year changes in days with heavy rainfall (≥ 1.0")

Month in Review — August 2026

73.4°F

Average temperature · August 2026

93rd-warmest month on record

28th-warmest August of 153 on record

+0.9° vs. 72.5° average (1991–2020)
79.3°F
Warmest month ever
July 2011
77.1°F
Warmest August ever
1995
97°F
Hottest of 2026
Jul 1

Average August Temperature by Year

1874–2026 · 2026 highlighted · trend +0.19° per decade (warming since 1874)

Precipitation — August 2026

Month total against the 1991–2020 average and every other August on record

1.75"
Total precipitation
August 2026
-1.50"
vs. average
Normal: 3.25" · 54% of normal
41st-driest
August rank
of 153 on record
8.33"
Wettest August ever
1926 · driest 0.16" (1894)

August Precipitation by Year

1874–2026 · 2026 highlighted · trend +0.05" per decade (wetter since 1874)

Wettest Augusts on Record

# Year Total
1 1926 8.33"
2 1975 7.83"
3 1940 7.51"
4 1877 7.29"
5 1959 7.07"
6 1987 6.87"
7 2007 6.61"
8 1956 6.53"
9 2023 6.50"
10 2014 6.32"

Driest Augusts on Record

# Year Total
1 1894 0.16"
2 1889 0.19"
3 2008 0.27"
4 1996 0.43"
5 1929 0.52"
6 2010 0.59"
7 1902 0.60"
8 1907 0.62"
9 1899 0.62"
10 1982 0.72"

Warmest Augusts on Record

# Year Avg Temp
1 1995 77.1°F
2 2016 76.7°F
3 1947 76.6°F
4 1959 76.3°F
5 2018 75.8°F
6 1955 75.7°F
7 2021 75.7°F
8 1900 75.5°F
9 2010 75.2°F
10 1988 75.0°F

Warmest Months on Record (Any Month)

# Month Avg Temp
1 July 2011 79.3°F
2 July 1955 79.1°F
3 July 1921 79.0°F
4 July 2012 79.0°F
5 July 1916 77.9°F
6 July 1931 77.7°F
7 July 2020 77.5°F
8 August 1995 77.1°F
9 July 1988 77.1°F
10 July 1901 76.8°F

Nearby Stations — August 2026

How the same month ranked at the closest reporting stations

Station Avg Temp August Rank
Detroit, MI 73.4°F 28th of 153
Toledo, OH 72.1°F 53rd of 153
Flint, MI 70.7°F 35th of 106
Lansing, MI 71.1°F 27th of 161
Saginaw, MI 70.9°F 30th of 115
About this data. Monthly averages are the mean of daily average temperatures, computed from NOAA Threadex records via RCC ACIS. Months missing more than three days of observations are excluded from the rankings, so the in-progress month never appears. Rankings cover 1,832 complete months on record. Precipitation totals sum the daily reports for the month, with trace amounts counted as zero. A month missing any day of precipitation data is left out entirely (an unreported day is unreported rain), so the precipitation ranking covers 153 complete Augusts. Normals are the 1991–2020 mean for the same calendar month. Trend lines are a least-squares fit across every year shown.

Fall in Review — Fall 2026

September 1 – November 30, 2026

Fall 2026 is still under way. Season totals and rankings appear once November closes; the markers below update as they happen.

Summer to Winter — 2026

Each turning point of the season against its 1991–2020 normal date, with the earliest and latest on record

Marker 2026 Normal vs. normal Earliest Latest Drift
Last 90°F day
The final day of summer heat
 Sep 2
so far
 Aug 30 Jun 10, 2000 Oct 8, 2007 +0.8 d/decade
Last 80°F day
The last genuinely warm afternoon
 Sep 3
so far
 Oct 1 Aug 31, 1876 Nov 1, 1950 +0.7 d/decade
First high below 50°F
The first afternoon that stays cold
 not yet Oct 22 Sep 24, 1950 Nov 21, 2024 +0.7 d/decade
First 32°F freeze
Growing season over
 not yet Oct 24 Sep 22, 1974 Nov 21, 2024 +0.1 d/decade
First 28°F hard freeze
Cold enough to end tender growth
 not yet Nov 7 Oct 3, 1974 Dec 4, 1899 +0.2 d/decade
First 20°F night
Winter cold arriving
 not yet Nov 28 Oct 20, 1974 Dec 27, 2012 +0.1 d/decade
First measurable snow
0.1" or more in a day
 not yet Nov 20 Oct 12, 2006 Dec 29, 1998 -0.2 d/decade

Drift is a least-squares fit across every year on record. Positive means the marker has been arriving later.

First Freeze by Year

The first 32°F night of each autumn since 1874 · trending +0.1 days later per decade

185
Normal length
1991–2020 average
229
Longest on record
2017
126
Shortest on record
1883

Growing Season Length by Year

Days between the last spring freeze and the first fall freeze · trending +0.2 days longer per decade

Fall Average Temperature by Year

1874–2025 · 2026 highlighted · trend +0.13° per decade (warming since 1874)

Fall Precipitation by Year

1874–2025 · 2026 highlighted · trend +0.04" per decade (wetter since 1874)

About this data. Fall is meteorological autumn, September 1 through November 30, the window NOAA uses for seasonal statistics. Seasonal temperature is the day-weighted mean of the three monthly means; precipitation is their sum, and a season missing any of the three months is left out of the rankings. Freeze, heat and snow markers come from daily NOAA Threadex observations via RCC ACIS: freezes and snow are the first occurrence on or after July 1, and the last 90°F and 80°F days are the final ones anywhere in the calendar year. Growing season counts the freeze-free days between the last spring 32°F and the first fall 32°F.
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