Quincy, IL

Illinois · Records since 1901–2026

☀️ 86°F
Currently in Quincy
As of 1:15 PM CDT

Records for September 7

🔥 Record High

101°F

September 7, 1922

+20° from 81° normal

❄ Record Low

42°F

September 7, 2025

-17° from 59° normal
🌞 Normal high: 81°F 🌑 Normal low: 59°F 1991–2020 normals

All-Time Records — Quincy

🔥
114°F
Hottest Day Ever
Jul 15, 1936
❄
-29°F
Coldest Day Ever
Feb 13, 1905
🌧
5.84"
Wettest Day Ever
Jun 14, 1950
☃
12.7"
Most Snow in One Day
Dec 25, 1915

Top 10 Record Highs — September 7

# Temp Date
🏆 101°F September 7, 1922
2 99°F September 7, 1939
3 98°F September 7, 1912
4 97°F September 7, 1960
5 97°F September 7, 1933
6 97°F September 7, 1913
7 97°F September 7, 1901
8 96°F September 7, 2013
9 96°F September 7, 1938
10 96°F September 7, 1936

Top 5 Record Lows — September 7

# Temp Date
🥶 42°F September 7, 2025
2 42°F September 7, 1956
3 44°F September 7, 2011
4 44°F September 7, 1986
5 45°F September 7, 2017
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 1901–2026. Climate normals represent the 1991–2020 average.

Heat Wave Summary — Quincy

threshold: 95°F (90th percentile of historical Jun–Aug highs)
5.3
Avg heat wave length
days (historical)
101°
Avg peak temp
during heat waves
36
Dangerous nights 2026
Overnights ≥ 70°F
1
Heat waves 2026
so far

2026 Daily High Temperature vs Normal

Year to date
Above normal Below normal

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

Days ≥ 90°F Per Year

1901–2026
22
2026 so far
35
Avg/year 1970–2025
28
Avg/year (last 10 complete)
90
Most in a year (1936)

Average Daily High by Decade

Full year · complete decades only

Longest Heat Waves — Quincy

# Dates Days Peak Avg High Avg Overnight Low
🏆 Jul 9, 1901 – Jul 28, 1901 20 111°F (Jul 22) 102°F 73°F
2 Aug 9, 1936 – Aug 28, 1936 20 109°F (Aug 24) 104°F 78°F
3 Jul 3, 1936 – Jul 20, 1936 18 114°F (Jul 15) 104°F 78°F
4 Jul 7, 1980 – Jul 20, 1980 14 105°F (Jul 14) 100°F 78°F
5 Jun 23, 1934 – Jul 6, 1934 14 104°F (Jun 28) 100°F 76°F
6 Jul 23, 1940 – Aug 5, 1940 14 104°F (Jul 25) 100°F 74°F
7 Aug 1, 1934 – Aug 12, 1934 12 111°F (Aug 9) 103°F 76°F
8 May 30, 1934 – Jun 9, 1934 11 103°F (May 30) 99°F 72°F
9 Jul 12, 1932 – Jul 22, 1932 11 100°F (Jul 19) 96°F 75°F
10 Aug 1, 1930 – Aug 10, 1930 10 106°F (Aug 9) 101°F 75°F

Heat Waves Per Year

Warm Summer Nights (Jun–Aug)

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

51
2026 total
above-normal nights
44.7
Avg / summer
1970–2020
77
Most in a summer
1921

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

32.05"
2026 YTD
Normal: 26.78"
+5.27"
0.00"
September so far
September normal: 3.09"
-3.09"
12
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 · Quincy is 5.27" ahead of the normal pace

Monthly Precipitation — Last 24 Months

Blue = actual · dashed line = monthly normal

Annual Precipitation Per Year (1901–2026)

Blue = above average · tan = below average · gold = 2026 (partial)
Since 1901, annual totals have trended +0.04" per decade, about +0.5" 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

75.2°F

Average temperature · August 2026

197th-warmest month on record

66th-warmest August of 126 on record

+0.6° vs. 74.5° average (1991–2020)
88.4°F
Warmest month ever
July 1934
86.1°F
Warmest August ever
1936
4
Days ≥ 90°F
in August
99°F
Hottest of 2026
Sep 1

Longest 90°F Streak in August

2 consecutive days with highs of at least 90°F (Aug 30–31, 2026, peaking at 97°F)

The longest August streak since 2025 (1 year). The August record is 24 days, set in 1947.

Average August Temperature by Year

1901–2026 · 2026 highlighted · trend -0.23° per decade (cooling since 1901)

Precipitation — August 2026

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

2.97"
Total precipitation
August 2026
-1.04"
vs. average
Normal: 4.01" · 74% of normal
59th-driest
August rank
of 123 on record
10.84"
Wettest August ever
1970 · driest 0.01" (2013)

August Precipitation by Year

1901–2026 · 2026 highlighted · trend +0.02" per decade (wetter since 1901)

Wettest Augusts on Record

# Year Total
1 1970 10.84"
2 1939 10.76"
3 2004 10.74"
4 1977 10.15"
5 1932 8.78"
6 1995 8.78"
7 2009 8.54"
8 1954 7.71"
9 2016 7.29"
10 1907 7.12"

Driest Augusts on Record

# Year Total
1 2013 0.01"
2 2011 0.25"
3 1992 0.27"
4 1947 0.32"
5 1901 0.32"
6 1910 0.41"
7 1984 0.42"
8 1920 0.56"
9 2022 0.72"
10 1936 0.77"

Warmest Augusts on Record

# Year Avg Temp
1 1936 86.1°F
2 1947 86.1°F
3 1913 82.5°F
4 1918 82.2°F
5 1983 81.7°F
6 1937 81.7°F
7 1934 81.2°F
8 1930 80.3°F
9 1938 79.9°F
10 2007 79.9°F

Warmest Months on Record (Any Month)

# Month Avg Temp
1 July 1934 88.4°F
2 July 1936 87.9°F
3 August 1936 86.1°F
4 August 1947 86.1°F
5 July 1916 84.9°F
6 July 1901 84.9°F
7 July 2012 83.7°F
8 July 1921 83.6°F
9 July 1980 83.5°F
10 July 1930 83.1°F

Nearby Stations — August 2026

How the same month ranked at the closest reporting stations

Station Avg Temp August Rank
Quincy, IL 75.2°F 66th of 126
Burlington, IA 74.2°F 65th of 128
Columbia, MO 77.3°F 45th of 137
Springfield, IL 75.6°F 50th of 148
Jefferson City, MO 77.8°F 41st of 123
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 1,498 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 123 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 5
so far
 Sep 11 Jul 14, 1981 Oct 30, 1950 -0.1 d/decade
Last 80°F day
The last genuinely warm afternoon
 Sep 6
so far
 Oct 13 Sep 16, 2009 Nov 8, 1915 -0.2 d/decade
First high below 50°F
The first afternoon that stays cold
 not yet Oct 22 Oct 3, 1999 Nov 20, 2024 -0.3 d/decade
First 32°F freeze
Growing season over
 not yet Oct 21 Sep 26, 1928 Nov 22, 1944 +0.3 d/decade
First 28°F hard freeze
Cold enough to end tender growth
 not yet Nov 1 Sep 28, 1942 Nov 29, 1983 +0.3 d/decade
First 20°F night
Winter cold arriving
 not yet Nov 23 Oct 19, 1972 Dec 31, 1923 +0.1 d/decade
First measurable snow
0.1" or more in a day
 not yet — Oct 24, 1929 Dec 29, 1946 -2.5 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 1901 · trending +0.3 days later per decade

191
Normal length
1991–2020 average
239
Longest on record
1929
149
Shortest on record
1908

Growing Season Length by Year

Days between the last spring freeze and the first fall freeze · trending +0.6 days longer per decade

Fall Average Temperature by Year

1901–2025 · 2026 highlighted · trend -0.15° per decade (cooling since 1901)

Fall Precipitation by Year

1901–2025 · 2026 highlighted · trend +0.03" per decade (wetter since 1901)

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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