Knoxville, TN

Tennessee · Records since 1871–2026

☁️ 88°F Feels like 96°
Currently in Knoxville
As of 2:15 PM EDT

Records for September 7

🔥 Record High

102°F

September 7, 1925

+17° from 85° normal

❄ Record Low

47°F

September 7, 1984

-17° from 64° normal
🌞 Normal high: 85°F 🌑 Normal low: 64°F 1991–2020 normals

All-Time Records — Knoxville

🔥
105°F
Hottest Day Ever
Jul 1, 2012
❄
-24°F
Coldest Day Ever
Jan 21, 1985
🌧
6.14"
Wettest Day Ever
Jul 16, 1917
☃
17.5"
Most Snow in One Day
Feb 13, 1960

Top 10 Record Highs — September 7

# Temp Date
🏆 102°F September 7, 1925
2 100°F September 7, 1954
3 99°F September 7, 1899
4 95°F September 7, 2016
5 95°F September 7, 1998
6 95°F September 7, 1990
7 95°F September 7, 1960
8 94°F September 7, 2010
9 94°F September 7, 1999
10 93°F September 7, 2002

Top 5 Record Lows — September 7

# Temp Date
🥶 47°F September 7, 1984
2 50°F September 7, 2017
3 51°F September 7, 1924
4 52°F September 7, 1896
5 53°F September 7, 1946
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 1871–2026. Climate normals represent the 1991–2020 average.
8
days
🔥 Heat Wave in Progress
8 consecutive days at or above 93°F · since August 30
Heat wave in progress (3+ days ≥ 93°F)

Heat Wave Summary — Knoxville

threshold: 93°F (90th percentile of historical Jun–Aug highs)
4.9
Avg heat wave length
days (historical)
97°
Avg peak temp
during heat waves
62
Dangerous nights 2026
Overnights ≥ 70°F
3
Heat waves 2026
so far

2026 Daily High Temperature vs Normal

Year to date
Above normal Below normal

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

Days ≥ 90°F Per Year

1871–2026
46
2026 so far
34
Avg/year 1970–2025
43
Avg/year (last 10 complete)
78
Most in a year (1936)

Average Daily High by Decade

Full year · complete decades only

Longest Heat Waves — Knoxville

# Dates Days Peak Avg High Avg Overnight Low
🏆 Aug 7, 2007 – Aug 29, 2007 23 102°F (Aug 23) 96°F 72°F
2 Jul 16, 1986 – Jul 30, 1986 15 98°F (Jul 19) 96°F 71°F
3 Jul 11, 1951 – Jul 24, 1951 14 98°F (Jul 22) 95°F 70°F
4 Jul 18, 1952 – Jul 30, 1952 13 103°F (Jul 27) 98°F 72°F
5 Jul 2, 1993 – Jul 14, 1993 13 100°F (Jul 8) 96°F 71°F
6 Jul 18, 1993 – Jul 29, 1993 12 100°F (Jul 28) 97°F 72°F
7 Jun 28, 2012 – Jul 8, 2012 11 105°F (Jun 30) 99°F 70°F
8 Jun 19, 1931 – Jun 29, 1931 11 101°F (Jun 27) 97°F 72°F
9 Jul 11, 1980 – Jul 21, 1980 11 101°F (Jul 17) 96°F 74°F
10 Jul 26, 2011 – Aug 5, 2011 11 99°F (Aug 3) 96°F 72°F

Heat Waves Per Year

Warm Summer Nights (Jun–Aug)

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

69
2026 total
above-normal nights
46.3
Avg / summer
1970–2020
76
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

32.55"
2026 YTD
Normal: 37.01"
-4.46"
0.06"
September so far
September normal: 3.49"
-3.43"
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 · Knoxville is 4.46" behind the normal pace

Monthly Precipitation — Last 24 Months

Blue = actual · dashed line = monthly normal

Annual Precipitation Per Year (1871–2026)

Blue = above average · tan = below average · gold = 2026 (partial)
Since 1871, annual totals have trended +0.10" per decade, about +1.6" 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

79.4°F

Average temperature · August 2026

57th-warmest month on record

18th-warmest August of 155 on record

+1.7° vs. 77.7° average (1991–2020)
83.2°F
Warmest month ever
August 2007
83.2°F
Warmest August ever
2007
14
Days ≥ 90°F
in August
98°F
Hottest of 2026
Sep 4

Longest 90°F Streak in August

7 consecutive days with highs of at least 90°F (Aug 13–19, 2026, peaking at 96°F)

The longest August streak since 2025 (1 year). The August record is 29 days, set in 2007.

Average August Temperature by Year

1871–2026 · 2026 highlighted · trend +0.13° per decade (warming since 1871)

Precipitation — August 2026

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

5.39"
Total precipitation
August 2026
+1.76"
vs. average
Normal: 3.63" · 148% of normal
28th-wettest
August rank
of 155 on record
11.33"
Wettest August ever
1920 · driest 0.77" (1954)

August Precipitation by Year

1871–2026 · 2026 highlighted · trend -0.03" per decade (drier since 1871)

Wettest Augusts on Record

# Year Total
1 1920 11.33"
2 1901 10.48"
3 2021 10.12"
4 1942 8.88"
5 1933 8.72"
6 2020 8.33"
7 1874 7.89"
8 1934 7.47"
9 1905 7.35"
10 2023 6.91"

Driest Augusts on Record

# Year Total
1 1954 0.77"
2 1999 0.85"
3 1953 0.88"
4 1946 0.97"
5 2011 1.06"
6 1987 1.08"
7 1896 1.25"
8 1968 1.29"
9 1951 1.30"
10 1996 1.33"

Warmest Augusts on Record

# Year Avg Temp
1 2007 83.2°F
2 1980 81.7°F
3 1995 81.5°F
4 2010 81.4°F
5 2016 81.4°F
6 1955 80.5°F
7 1871 80.4°F
8 2006 80.4°F
9 1900 80.3°F
10 1936 80.2°F

Warmest Months on Record (Any Month)

# Month Avg Temp
1 August 2007 83.2°F
2 July 1993 83.0°F
3 July 2025 82.2°F
4 July 1980 82.1°F
5 July 2010 81.8°F
6 July 2011 81.8°F
7 July 1954 81.7°F
8 July 2016 81.7°F
9 August 1980 81.7°F
10 August 1995 81.5°F

Nearby Stations — August 2026

How the same month ranked at the closest reporting stations

Station Avg Temp August Rank
Knoxville, TN 79.4°F 18th of 155
Oak Ridge, TN 80.2°F 5th of 80
Asheville, NC 75.3°F 6th of 133
Bristol-Johnson City, TN 76.2°F 13th of 88
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 1,867 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 155 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 6
so far
 Sep 8 Jun 21, 1967 Oct 9, 1939 +0.2 d/decade
Last 80°F day
The last genuinely warm afternoon
 Sep 6
so far
 Oct 20 Sep 16, 1875 Dec 4, 1982 +0.6 d/decade
First high below 50°F
The first afternoon that stays cold
 not yet Nov 11 Oct 1, 1876 Dec 11, 2004 +0.5 d/decade
First 32°F freeze
Growing season over
 not yet Nov 2 Oct 4, 1987 Dec 6, 1978 +0.3 d/decade
First 28°F hard freeze
Cold enough to end tender growth
 not yet Nov 14 Oct 11, 1906 Dec 9, 1978 +0.3 d/decade
First 20°F night
Winter cold arriving
 not yet Dec 10 Nov 3, 1954 Dec 29, 1952 +0.4 d/decade
First measurable snow
0.1" or more in a day
 not yet — Nov 8, 1991 Dec 31, 1939 +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 1871 · trending +0.3 days later per decade

214
Normal length
1991–2020 average
262
Longest on record
1978
175
Shortest on record
1988

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

1871–2025 · 2026 highlighted · trend +0.12° per decade (warming since 1871)

Fall Precipitation by Year

1871–2025 · 2026 highlighted · trend +0.10" per decade (wetter since 1871)

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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