Peoria, IL

Illinois · Records since 1883–2026

☀️ 81°F Feels like 84°
Currently in Peoria
As of 1:30 PM CDT

Records for September 7

🔥 Record High

101°F

September 7, 1939

+20° from 81° normal

❄ Record Low

43°F

September 7, 1956

-17° from 60° normal
🌞 Normal high: 81°F 🌑 Normal low: 60°F 1991–2020 normals

All-Time Records — Peoria

🔥
113°F
Hottest Day Ever
Jul 15, 1936
❄
-27°F
Coldest Day Ever
Jan 5, 1884
🌧
5.52"
Wettest Day Ever
May 18, 1927
☃
12.2"
Most Snow in One Day
Jan 13, 1979

Top 10 Record Highs — September 7

# Temp Date
🏆 101°F September 7, 1939
2 101°F September 7, 1899
3 99°F September 7, 1922
4 97°F September 7, 1933
5 96°F September 7, 1913
6 94°F September 7, 1985
7 94°F September 7, 1960
8 94°F September 7, 1938
9 94°F September 7, 1897
10 94°F September 7, 1886

Top 5 Record Lows — September 7

# Temp Date
🥶 43°F September 7, 1956
2 44°F September 7, 1988
3 44°F September 7, 1986
4 45°F September 7, 2025
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 1883–2026. Climate normals represent the 1991–2020 average.

Heat Wave Summary — Peoria

threshold: 94°F (90th percentile of historical Jun–Aug highs)
4.5
Avg heat wave length
days (historical)
99°
Avg peak temp
during heat waves
32
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

130 of 248 days with data were above the 1991–2020 normal high for their date.

Days ≥ 90°F Per Year

1883–2026
19
2026 so far
28
Avg/year 1970–2025
26
Avg/year (last 10 complete)
69
Most in a year (1887)

Average Daily High by Decade

Full year · complete decades only

Longest Heat Waves — Peoria

# Dates Days Peak Avg High Avg Overnight Low
🏆 Jul 3, 1936 – Jul 18, 1936 16 113°F (Jul 15) 105°F 74°F
2 Jun 17, 1933 – Jun 27, 1933 11 101°F (Jun 26) 96°F 67°F
3 Jul 26, 1887 – Aug 4, 1887 10 104°F (Jul 29) 99°F 72°F
4 Jul 19, 1901 – Jul 27, 1901 9 106°F (Jul 24) 101°F 73°F
5 Jul 9, 1901 – Jul 17, 1901 9 104°F (Jul 10) 96°F 67°F
6 Jun 24, 1931 – Jul 2, 1931 9 103°F (Jun 29) 101°F 75°F
7 Aug 26, 1953 – Sep 3, 1953 9 100°F (Sep 1) 96°F 68°F
8 Aug 2, 1900 – Aug 10, 1900 9 99°F (Aug 5) 97°F 69°F
9 Sep 7, 1897 – Sep 15, 1897 9 97°F (Sep 10) 96°F 66°F
10 Jul 24, 1916 – Jul 31, 1916 8 103°F (Jul 29) 100°F 72°F

Heat Waves Per Year

Warm Summer Nights (Jun–Aug)

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

45
2026 total
above-normal nights
41.5
Avg / summer
1970–2020
67
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

30.84"
2026 YTD
Normal: 26.77"
+4.07"
0.00"
September so far
September normal: 3.48"
-3.48"
10
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 · Peoria is 4.07" ahead of the normal pace

Monthly Precipitation — Last 24 Months

Blue = actual · dashed line = monthly normal

Annual Precipitation Per Year (1883–2026)

Blue = above average · tan = below average · gold = 2026 (partial)
Since 1883, annual totals have trended +0.29" per decade, about +4.1" 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

74.7°F

Average temperature · August 2026

180th-warmest month on record

52nd-warmest August of 144 on record

+0.6° vs. 74.1° average (1991–2020)
84.3°F
Warmest month ever
July 1936
82.0°F
Warmest August ever
1947
96°F
Hottest of 2026
Sep 3

Average August Temperature by Year

1883–2026 · 2026 highlighted

Precipitation — August 2026

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

6.63"
Total precipitation
August 2026
+3.32"
vs. average
Normal: 3.31" · 200% of normal
11th-wettest
August rank
of 139 on record
8.61"
Wettest August ever
1965 · driest 0.25" (1992)

August Precipitation by Year

1883–2026 · 2026 highlighted · trend +0.05" per decade (wetter since 1883)

Wettest Augusts on Record

# Year Total
1 1965 8.61"
2 1954 8.56"
3 2016 7.45"
4 1902 7.42"
5 1993 7.38"
6 1977 7.28"
7 1903 7.22"
8 1924 7.15"
9 2014 6.94"
10 1926 6.79"

Driest Augusts on Record

# Year Total
1 1992 0.25"
2 2013 0.33"
3 1893 0.44"
4 1883 0.57"
5 2020 0.59"
6 1910 0.68"
7 1922 0.72"
8 1892 0.73"
9 1984 0.78"
10 1909 0.79"

Warmest Augusts on Record

# Year Avg Temp
1 1947 82.0°F
2 1983 80.8°F
3 1900 80.5°F
4 1936 80.3°F
5 1995 79.4°F
6 1886 78.9°F
7 1988 78.5°F
8 1937 78.3°F
9 2007 78.3°F
10 1913 77.8°F

Warmest Months on Record (Any Month)

# Month Avg Temp
1 July 1936 84.3°F
2 July 1887 82.7°F
3 July 2012 82.4°F
4 July 1901 82.4°F
5 August 1947 82.0°F
6 July 1893 81.3°F
7 July 1916 81.0°F
8 July 1934 81.0°F
9 July 1955 80.9°F
10 August 1983 80.8°F

Nearby Stations — August 2026

How the same month ranked at the closest reporting stations

Station Avg Temp August Rank
Peoria, IL 74.7°F 52nd of 144
Springfield, IL 75.6°F 50th of 148
Moline, IL 73.5°F 66th of 153
Burlington, IA 74.2°F 65th of 128
Quincy, IL 75.2°F 66th of 126
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 1,714 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 139 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 7 Jul 12, 1950 Oct 15, 1897 -0.5 d/decade
Last 80°F day
The last genuinely warm afternoon
 Sep 6
so far
 Oct 10 Sep 12, 2012 Nov 1, 2000 -0.3 d/decade
First high below 50°F
The first afternoon that stays cold
 not yet Oct 23 Sep 20, 1918 Nov 21, 2024 +0.1 d/decade
First 32°F freeze
Growing season over
 not yet Oct 17 Sep 20, 1991 Nov 21, 2024 +0.3 d/decade
First 28°F hard freeze
Cold enough to end tender growth
 not yet Nov 1 Sep 28, 1942 Dec 4, 1902 +0.3 d/decade
First 20°F night
Winter cold arriving
 not yet Nov 21 Oct 19, 1972 Dec 24, 2001
First measurable snow
0.1" or more in a day
 not yet Nov 27 Sep 25, 1942 Dec 30, 1927 +0.3 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 1883 · trending +0.3 days later per decade

185
Normal length
1991–2020 average
228
Longest on record
2024
136
Shortest on record
1925

Growing Season Length by Year

Days between the last spring freeze and the first fall freeze · trending +0.4 days longer per decade

Fall Average Temperature by Year

1883–2025 · 2026 highlighted

Fall Precipitation by Year

1886–2025 · 2026 highlighted · trend +0.08" per decade (wetter since 1886)

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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