Burlington, IA

Iowa · Records since 1897–2026

☀️ 80°F
Currently in Burlington
As of 1:00 PM CDT

Records for September 7

🔥 Record High

101°F

September 7, 1899

+21° from 80° normal

❄ Record Low

42°F

September 7, 2025

-17° from 59° normal
🌞 Normal high: 80°F 🌑 Normal low: 59°F 1991–2020 normals

All-Time Records — Burlington

🔥
111°F
Hottest Day Ever
Jul 15, 1936
❄
-27°F
Coldest Day Ever
Feb 13, 1905
🌧
6.28"
Wettest Day Ever
Jun 29, 1933
☃
13.5"
Most Snow in One Day
Jan 26, 1967

Top 10 Record Highs — September 7

# Temp Date
🏆 101°F September 7, 1899
2 100°F September 7, 1939
3 99°F September 7, 1922
4 98°F September 7, 1913
5 98°F September 7, 1912
6 97°F September 7, 1901
7 96°F September 7, 1985
8 96°F September 7, 1960
9 96°F September 7, 1933
10 95°F September 7, 2013

Top 5 Record Lows — September 7

# Temp Date
🥶 42°F September 7, 2025
2 42°F September 7, 1956
3 44°F September 7, 2017
4 44°F September 7, 1944
5 45°F September 7, 2024
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 1897–2026. Climate normals represent the 1991–2020 average.

Heat Wave Summary — Burlington

threshold: 94°F (90th percentile of historical Jun–Aug highs)
4.8
Avg heat wave length
days (historical)
99°
Avg peak temp
during heat waves
29
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

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

Days ≥ 90°F Per Year

1897–2026
19
2026 so far
28
Avg/year 1970–2025
21
Avg/year (last 10 complete)
74
Most in a year (1936)

Average Daily High by Decade

Full year · complete decades only

Longest Heat Waves — Burlington

# Dates Days Peak Avg High Avg Overnight Low
🏆 Jul 17, 1987 – Aug 3, 1987 18 104°F (Aug 1) 98°F 74°F
2 Jul 3, 1936 – Jul 18, 1936 16 111°F (Jul 14) 105°F 77°F
3 Jun 16, 1933 – Jun 27, 1933 12 103°F (Jun 26) 98°F 69°F
4 Aug 9, 1936 – Aug 19, 1936 11 105°F (Aug 18) 100°F 72°F
5 May 29, 1934 – Jun 8, 1934 11 104°F (Jun 1) 99°F 69°F
6 Jul 23, 1916 – Aug 1, 1916 10 104°F (Jul 27) 100°F 73°F
7 Jun 22, 1931 – Jul 1, 1931 10 102°F (Jun 27) 100°F 76°F
8 Aug 25, 1953 – Sep 3, 1953 10 99°F (Aug 31) 97°F 68°F
9 Jul 18, 1901 – Jul 26, 1901 9 107°F (Jul 24) 101°F 74°F
10 Aug 31, 1960 – Sep 8, 1960 9 97°F (Sep 2) 96°F 69°F

Heat Waves Per Year

Warm Summer Nights (Jun–Aug)

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

47
2026 total
above-normal nights
44.5
Avg / summer
1970–2020
72
Most in a summer
2010

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

30.22"
2026 YTD
Normal: 27.86"
+2.36"
0.00"
September so far
September normal: 3.53"
-3.53"
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 · Burlington is 2.36" ahead of the normal pace

Monthly Precipitation — Last 24 Months

Blue = actual · dashed line = monthly normal

Annual Precipitation Per Year (1897–2026)

Blue = above average · tan = below average · gold = 2026 (partial)
Since 1897, annual totals have trended +0.33" per decade, about +4.3" 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

74.2°F

Average temperature · August 2026

189th-warmest month on record

65th-warmest August of 128 on record

+0.0° vs. 74.1° average (1991–2020)
86.6°F
Warmest month ever
July 1936
82.4°F
Warmest August ever
1947
3
Days ≥ 90°F
in August
97°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 94°F)

The longest August streak since 2025 (1 year). The August record is 20 days, set in 1936.

Average August Temperature by Year

1897–2026 · 2026 highlighted · trend -0.10° per decade (cooling since 1897)

Precipitation — August 2026

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

6.76"
Total precipitation
August 2026
+2.99"
vs. average
Normal: 3.77" · 179% of normal
14th-wettest
August rank
of 126 on record
11.40"
Wettest August ever
1980 · driest 0.00" (2013)

August Precipitation by Year

1897–2026 · 2026 highlighted · trend +0.05" per decade (wetter since 1897)

Wettest Augusts on Record

# Year Total
1 1980 11.40"
2 1902 10.62"
3 2009 9.47"
4 2007 8.91"
5 1952 8.83"
6 1970 8.13"
7 1903 7.63"
8 2023 7.56"
9 1993 7.36"
10 1965 7.34"

Driest Augusts on Record

# Year Total
1 2013 0.00"
2 2020 0.30"
3 1901 0.36"
4 1910 0.43"
5 2011 0.44"
6 1920 0.44"
7 2000 0.58"
8 1971 0.58"
9 1953 0.73"
10 1914 0.83"

Warmest Augusts on Record

# Year Avg Temp
1 1947 82.4°F
2 1936 81.7°F
3 1983 81.0°F
4 1995 79.7°F
5 1913 79.5°F
6 1937 79.1°F
7 2007 79.1°F
8 1909 79.0°F
9 1918 78.7°F
10 1988 78.7°F

Warmest Months on Record (Any Month)

# Month Avg Temp
1 July 1936 86.6°F
2 July 1901 83.7°F
3 July 1934 83.1°F
4 July 1916 82.8°F
5 August 1947 82.4°F
6 August 1936 81.7°F
7 July 1999 81.5°F
8 June 1934 81.3°F
9 July 2012 81.1°F
10 August 1983 81.0°F

Nearby Stations — August 2026

How the same month ranked at the closest reporting stations

Station Avg Temp August Rank
Burlington, IA 74.2°F 65th of 128
Moline, IL 73.5°F 66th of 153
Quincy, IL 75.2°F 66th of 126
Peoria, IL 74.7°F 52nd of 144
Cedar Rapids, IA 72.3°F 56th of 134
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 1,528 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 126 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 9 Jul 12, 1950 Oct 17, 1910 -0.5 d/decade
Last 80°F day
The last genuinely warm afternoon
 Sep 6
so far
 Oct 13 Sep 18, 1977 Nov 17, 1899 -0.4 d/decade
First high below 50°F
The first afternoon that stays cold
 not yet Oct 23 Sep 19, 1901 Nov 21, 2004 +0.2 d/decade
First 32°F freeze
Growing season over
 not yet Oct 17 Sep 18, 1918 Nov 12, 2016 +0.3 d/decade
First 28°F hard freeze
Cold enough to end tender growth
 not yet Oct 29 Sep 28, 1942 Nov 25, 2024 +0.1 d/decade
First 20°F night
Winter cold arriving
 not yet Nov 22 Oct 13, 1909 Dec 31, 1923 +0.6 d/decade
First measurable snow
0.1" or more in a day
 not yet Nov 26 Sep 25, 1942 Dec 31, 1923 -0.1 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 1897 · trending +0.3 days later per decade

184
Normal length
1991–2020 average
225
Longest on record
1998
147
Shortest on record
1913

Growing Season Length by Year

Days between the last spring freeze and the first fall freeze · trending +0.8 days longer per decade

Fall Average Temperature by Year

1901–2024 · 2026 highlighted

Fall Precipitation by Year

1899–2024 · 2026 highlighted

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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