Denver, CO

Colorado · Records since 1872–2026

☁️ 85°F
Currently in Denver
As of 11:45 AM MDT

Records for September 7

🔥 Record High

99°F

September 7, 2022

+16° from 83° normal

❄ Record Low

34°F

September 7, 1929

-19° from 53° normal
🌞 Normal high: 83°F 🌑 Normal low: 53°F 1991–2020 normals

All-Time Records — Denver

🔥
105°F
Hottest Day Ever
Jun 28, 2018
❄
-29°F
Coldest Day Ever
Jan 9, 1875
🌧
6.50"
Wettest Day Ever
May 22, 1876
☃
23.6"
Most Snow in One Day
Dec 24, 1982

Top 10 Record Highs — September 7

# Temp Date
🏆 99°F September 7, 2022
2 95°F September 7, 2013
3 95°F September 7, 1933
4 94°F September 7, 2002
5 94°F September 7, 1988
6 94°F September 7, 1971
7 94°F September 7, 1959
8 93°F September 7, 2020
9 93°F September 7, 1983
10 93°F September 7, 1977

Top 5 Record Lows — September 7

# Temp Date
🥶 34°F September 7, 1929
2 38°F September 7, 1898
3 41°F September 7, 2001
4 42°F September 7, 1881
5 43°F September 7, 2020
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 1872–2026. Climate normals represent the 1991–2020 average.

Heat Wave Summary — Denver

threshold: 94°F (90th percentile of historical Jun–Aug highs)
4.1
Avg heat wave length
days (historical)
98°
Avg peak temp
during heat waves
4
Dangerous nights 2026
Overnights ≥ 70°F
6
Heat waves 2026
so far

2026 Daily High Temperature vs Normal

Year to date
Above normal Below normal

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

Days ≥ 90°F Per Year

1872–2026
63
2026 so far
32
Avg/year 1970–2025
56
Avg/year (last 10 complete)
75
Most in a year (2020)

Average Daily High by Decade

Full year · complete decades only

Longest Heat Waves — Denver

# Dates Days Peak Avg High Avg Overnight Low
🏆 Jun 22, 2012 – Jul 5, 2012 14 105°F (Jun 25) 100°F 65°F
2 Jul 2, 1874 – Jul 13, 1874 12 102°F (Jul 4) 98°F 62°F
3 Jul 12, 2022 – Jul 23, 2022 12 100°F (Jul 18) 97°F 65°F
4 Jun 23, 1990 – Jul 3, 1990 11 102°F (Jun 27) 99°F 63°F
5 Jul 6, 2005 – Jul 16, 2005 11 102°F (Jul 16) 97°F 62°F
6 Jul 27, 2024 – Aug 6, 2024 11 102°F (Aug 4) 98°F 63°F
7 Jun 30, 1989 – Jul 9, 1989 10 103°F (Jul 8) 99°F 62°F
8 Jun 29, 2001 – Jul 6, 2001 8 101°F (Jul 1) 97°F 64°F
9 Jul 18, 2016 – Jul 25, 2016 8 99°F (Jul 23) 96°F 63°F
10 Jul 6, 2020 – Jul 13, 2020 8 99°F (Jul 7) 97°F 62°F

Heat Waves Per Year

Warm Summer Nights (Jun–Aug)

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

64
2026 total
above-normal nights
39.5
Avg / summer
1970–2020
77
Most in a summer
1934

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

7.24"
2026 YTD
Normal: 11.41"
-4.17"
0.00"
September so far
September normal: 1.35"
-1.35"
0
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 · Denver is 4.17" behind the normal pace

Monthly Precipitation — Last 24 Months

Blue = actual · dashed line = monthly normal

Annual Precipitation Per Year (1872–2026)

Blue = above average · tan = below average · gold = 2026 (partial)
Since 1872, annual totals have trended +0.04" 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")

Month in Review — August 2026

76.3°F

Average temperature · August 2026

23rd-warmest month on record

4th-warmest August of 155 on record

+3.6° vs. 72.7° average (1991–2020)
78.9°F
Warmest month ever
July 2012
77.0°F
Warmest August ever
2020
20
Days ≥ 90°F
in August
103°F
Hottest of 2026
Jul 26

Longest 90°F Streak in August

7 consecutive days with highs of at least 90°F (Aug 6–12, 2026, peaking at 100°F)

Ties the longest August streak since 2024 (2 years). The August record is 17 days, set in 2020.

Average August Temperature by Year

1872–2026 · 2026 highlighted · trend +0.17° per decade (warming since 1872)

Precipitation — August 2026

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

1.59"
Total precipitation
August 2026
-0.01"
vs. average
Normal: 1.60" · 99% of normal
56th-wettest
August rank
of 155 on record
5.85"
Wettest August ever
1979 · driest 0.02" (1924)

August Precipitation by Year

1872–2026 · 2026 highlighted · trend +0.01" per decade (wetter since 1872)

Wettest Augusts on Record

# Year Total
1 1979 5.85"
2 1951 4.47"
3 2025 4.12"
4 2008 4.03"
5 1923 3.87"
6 1991 3.69"
7 1997 3.52"
8 1921 3.49"
9 1999 3.37"
10 1936 3.22"

Driest Augusts on Record

# Year Total
1 1924 0.02"
2 1917 0.05"
3 1900 0.05"
4 1960 0.06"
5 2012 0.11"
6 1974 0.16"
7 1948 0.19"
8 2016 0.22"
9 1907 0.23"
10 1959 0.25"

Warmest Augusts on Record

# Year Avg Temp
1 2020 77.0°F
2 2011 77.0°F
3 1937 76.8°F
4 2026 76.3°F
5 2022 76.1°F
6 2024 75.6°F
7 2021 75.4°F
8 2007 75.4°F
9 2019 75.4°F
10 1995 75.3°F

Warmest Months on Record (Any Month)

# Month Avg Temp
1 July 2012 78.9°F
2 July 2026 78.7°F
3 July 2022 78.1°F
4 July 1934 77.8°F
5 July 2005 77.7°F
6 July 2008 77.6°F
7 July 1936 77.3°F
8 July 1939 77.1°F
9 August 2020 77.0°F
10 August 2011 77.0°F

Nearby Stations — August 2026

How the same month ranked at the closest reporting stations

Station Avg Temp August Rank
Denver, CO 76.3°F 4th of 155
Colorado Springs, CO 73.8°F 4th of 128
Cheyenne, WY 71.1°F 5th of 154
Pueblo, CO 77.7°F 8th of 139
Alamosa, CO 67.5°F 1st of 96
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 1,856 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 11 Jul 20, 1927 Oct 1, 1892 +0.8 d/decade
Last 80°F day
The last genuinely warm afternoon
 Sep 6
so far
 Oct 17 Sep 15, 1882 Nov 27, 2017 +0.9 d/decade
First high below 50°F
The first afternoon that stays cold
 not yet Oct 6 Sep 3, 1961 Dec 3, 1901 -0.5 d/decade
First 32°F freeze
Growing season over
 not yet Oct 4 Sep 8, 1962 Nov 15, 1944 +0.1 d/decade
First 28°F hard freeze
Cold enough to end tender growth
 not yet Oct 17 Sep 18, 1971 Nov 22, 1934 -0.1 d/decade
First 20°F night
Winter cold arriving
 not yet Nov 2 Sep 19, 1971 Dec 10, 1949 -0.4 d/decade
First measurable snow
0.1" or more in a day
 not yet Oct 18 Sep 3, 1961 Dec 22, 1948 -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 1872 · trending +0.1 days later per decade

147
Normal length
1991–2020 average
200
Longest on record
1940
110
Shortest on record
1951

Growing Season Length by Year

Days between the last spring freeze and the first fall freeze

Fall Average Temperature by Year

1872–2025 · 2026 highlighted · trend +0.07° per decade (warming since 1872)

Fall Precipitation by Year

1872–2025 · 2026 highlighted · trend +0.02" per decade (wetter since 1872)

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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