Alpena, MI

Michigan · Records since 1916–2026

☀️ 76°F
Currently in Alpena
As of 2:30 PM

Records for September 11

🔥 Record High

98°F

September 11, 1931

+25° from 73° normal

❄ Record Low

28°F

September 11, 1918

-20° from 48° normal
🌞 Normal high: 73°F 🌑 Normal low: 48°F 1991–2020 normals

All-Time Records — Alpena

🔥
106°F
Hottest Day Ever
Jul 13, 1936
❄
-37°F
Coldest Day Ever
Feb 17, 1979
🌧
5.14"
Wettest Day Ever
Sep 3, 1937
☃
18.2"
Most Snow in One Day
Feb 22, 1922

First & Last Dates — Alpena

How early and how late each seasonal turning point has ever arrived, across the full period of record

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Range ever recorded Normal date (1991–2020)
169 days
Longest growing season
2017
60 days
Shortest growing season
1925
134 days
Normal growing season
1991–2020 average

Top 10 Record Highs — September 11

# Temp Date
🏆 98°F September 11, 1931
2 90°F September 11, 2005
3 90°F September 11, 1998
4 90°F September 11, 1952
5 86°F September 11, 1961
6 85°F September 11, 2004
7 85°F September 11, 1974
8 85°F September 11, 1930
9 84°F September 11, 2011
10 84°F September 11, 1947

Top 5 Record Lows — September 11

# Temp Date
🥶 28°F September 11, 1918
2 30°F September 11, 1967
3 30°F September 11, 1965
4 32°F September 11, 1924
5 33°F September 11, 1958
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 1916–2026. Climate normals represent the 1991–2020 average.

Heat Wave Summary — Alpena

threshold: 88°F (90th percentile of historical Jun–Aug highs)
3.9
Avg heat wave length
days (historical)
95°
Avg peak temp
during heat waves
2
Dangerous nights 2026
Overnights ≥ 70°F
0
Heat waves 2026
so far

Days ≥ 90°F Per Year

1917–2026
4
2026 so far
8
Avg/year 1970–2025
10
Avg/year (last 10 complete)
32
Most in a year (1955)

Average Daily High by Decade

Full year · complete decades only

Longest Heat Waves — Alpena

# Dates Days Peak Avg High Avg Overnight Low
🏆 Jul 11, 1983 – Jul 20, 1983 10 102°F (Jul 14) 92°F 62°F
2 Aug 26, 1953 – Sep 4, 1953 10 99°F (Sep 1) 95°F 63°F
3 Jul 17, 1987 – Jul 25, 1987 9 97°F (Jul 20) 93°F 64°F
4 Jul 1, 2020 – Jul 9, 2020 9 96°F (Jul 9) 91°F 61°F
5 Jul 7, 1936 – Jul 14, 1936 8 106°F (Jul 13) 102°F 66°F
6 Jun 30, 1921 – Jul 7, 1921 8 99°F (Jul 6) 94°F 63°F
7 Aug 15, 1955 – Aug 22, 1955 8 99°F (Aug 21) 94°F 63°F
8 Jul 30, 1955 – Aug 5, 1955 7 98°F (Aug 1) 94°F 66°F
9 Jun 13, 1919 – Jun 19, 1919 7 94°F (Jun 13) 91°F 60°F
10 Aug 9, 1944 – Aug 15, 1944 7 94°F (Aug 10) 92°F 58°F

Heat Waves Per Year

Warm Summer Nights (Jun–Aug)

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

48
2026 total
above-normal nights
40.8
Avg / summer
1970–2020
63
Most in a summer
2010

Above-Normal Summer Nights Per Year

Average June–August Low by Decade

Overnight lows · complete decades only

Precipitation

Annual totals and trend across the full period of record · see this year's standing →

Monthly Precipitation — Last 24 Months

Blue = actual · dashed line = monthly normal

Annual Precipitation Per Year (1916–2026)

Blue = above average · tan = below average · gold = 2026 (partial)
Since 1916, annual totals have trended +0.06" per decade, about +0.6" across the record.

Heavy Rain Days Per Year (≥ 1.0")

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

This Year — 2026

How Alpena is tracking against normal, year to date

Daily High Temperature vs Normal

Above normal Below normal

102 of 253 days with data were above the 1991–2020 normal high for their date.

Precipitation, Year to Date

32.40"
2026 YTD
Normal: 20.83"
+11.57"
0.59"
September so far
September normal: 2.84"
-2.25"
8
2026 heavy rain days
Days with ≥ 1.0"

Accumulation vs. Normal

Running total since Jan 1 against the normal pace for the same date · Alpena is 11.57" ahead of the normal pace

Period Review — Sep 1 – Sep 10, 2026

Any window, evaluated against every other year on record — 10 days

Quick picks: Last 7 days Last 30 days Last 90 days This month
Seasons: Spring (Mar–May) Summer (Jun–Aug) Fall (Sep–Nov)
65.9°F
Average temperature
20th-warmest of 109
+3.8°
vs. average
Normal: 62.1°F (1991–2020)
0.59"
Precipitation
46th-driest of 110
-0.36"
vs. average
Normal: 0.95" · 62% of normal

Average Temperature by Year — Sep 1 – Sep 10

1917–2026 · 2026 highlighted · trend +0.11° per decade (warming since 1917)

Precipitation by Year — Sep 1 – Sep 10

1917–2026 · 2026 highlighted · trend -0.03" per decade (drier since 1917)

Warmest Sep 1 – Sep 10 on Record

# Year Avg Temp
1 1961 71.2°F
2 2015 70.7°F
3 1983 70.5°F
4 1953 70.1°F
5 1959 69.8°F
6 2002 69.5°F
7 1929 68.7°F
8 1922 68.6°F
9 1996 68.3°F
10 1971 68.2°F

Coolest Sep 1 – Sep 10 on Record

# Year Avg Temp
1 1924 51.2°F
2 1917 52.4°F
3 1935 53.9°F
4 1938 54.6°F
5 1974 54.7°F
6 2017 54.7°F
7 1950 55.2°F
8 1975 55.2°F
9 1994 55.9°F
10 2025 56.0°F

Wettest Sep 1 – Sep 10 on Record

# Year Total
1 1937 7.63"
2 1968 4.07"
3 2018 2.63"
4 1946 2.42"
5 2008 2.40"
6 1958 2.35"
7 1982 2.34"
8 1984 2.32"
9 2001 2.31"
10 2014 2.30"

Driest Sep 1 – Sep 10 on Record

# Year Total
1 2009 0.00"
2 1919 0.00"
3 2005 0.02"
4 2002 0.02"
5 1971 0.02"
6 1917 0.02"
7 2022 0.03"
8 1950 0.03"
9 1929 0.06"
10 1999 0.07"
About this data. Pick any start and end date and this becomes the same kind of review as the Month and Fall tabs, just for exactly the window you asked for — the generalized version of the same engine, evaluated across every year on record. Average temperature is the mean of each day's (high + low) / 2; precipitation is the sum of daily totals. A year missing more than about a fifth of the window's days is excluded from the temperature ranking; any missing day excludes a year from the precipitation ranking, since an unreported day is unreported rain. Ranges that cross from December into January aren't supported yet. Normals are the 1991–2020 mean for the same window.
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