Cheyenne, WY

Wyoming · Records since 1872–2026

☀️ 83°F Feels like 78°
Currently in Cheyenne
As of 12:00 PM MDT

Records for September 7

🔥 Record High

97°F

September 7, 2022

+20° from 77° normal

❄ Record Low

30°F

September 7, 1898

-19° from 49° normal
🌞 Normal high: 77°F 🌑 Normal low: 49°F 1991–2020 normals

All-Time Records — Cheyenne

🔥
100°F
Hottest Day Ever
Jun 23, 1954
❄
-38°F
Coldest Day Ever
Jan 9, 1875
🌧
6.06"
Wettest Day Ever
Aug 1, 1985
☃
22.7"
Most Snow in One Day
Mar 14, 2021

Top 10 Record Highs — September 7

# Temp Date
🏆 97°F September 7, 2022
2 90°F September 7, 1959
3 89°F September 7, 1908
4 88°F September 7, 1988
5 88°F September 7, 1979
6 87°F September 7, 2013
7 87°F September 7, 1980
8 87°F September 7, 1977
9 86°F September 7, 2020
10 86°F September 7, 2005

Top 5 Record Lows — September 7

# Temp Date
🥶 30°F September 7, 1898
2 31°F September 7, 1929
3 32°F September 7, 2020
4 35°F September 7, 1923
5 36°F September 7, 2010
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 — Cheyenne

threshold: 89°F (90th percentile of historical Jun–Aug highs)
4.1
Avg heat wave length
days (historical)
94°
Avg peak temp
during heat waves
0
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

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

Days ≥ 90°F Per Year

1873–2026
20
2026 so far
10
Avg/year 1970–2025
21
Avg/year (last 10 complete)
33
Most in a year (2020)

Average Daily High by Decade

Full year · complete decades only

Longest Heat Waves — Cheyenne

# Dates Days Peak Avg High Avg Overnight Low
🏆 Jul 1, 1874 – Jul 13, 1874 13 98°F (Jul 4) 92°F 54°F
2 Jul 12, 2022 – Jul 22, 2022 11 99°F (Jul 18) 94°F 62°F
3 Jul 11, 1934 – Jul 21, 1934 11 97°F (Jul 15) 93°F 61°F
4 Jul 3, 1966 – Jul 13, 1966 11 95°F (Jul 7) 92°F 60°F
5 Jul 12, 2003 – Jul 21, 2003 10 98°F (Jul 16) 93°F 62°F
6 Jul 1, 1989 – Jul 10, 1989 10 97°F (Jul 7) 94°F 56°F
7 Jul 21, 1987 – Jul 30, 1987 10 92°F (Jul 23) 91°F 60°F
8 Jul 8, 1939 – Jul 16, 1939 9 100°F (Jul 11) 94°F 57°F
9 Jul 29, 2024 – Aug 6, 2024 9 94°F (Jul 30) 93°F 58°F
10 Jul 12, 2002 – Jul 20, 2002 9 93°F (Jul 16) 92°F 59°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
37.9
Avg / summer
1970–2020
66
Most in a summer
2022

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

9.04"
2026 YTD
Normal: 12.15"
-3.11"
0.01"
September so far
September normal: 1.47"
-1.46"
2
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 · Cheyenne is 3.11" 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 +0.11" per decade, about +1.7" 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

71.1°F

Average temperature · August 2026

31st-warmest month on record

5th-warmest August of 154 on record

+3.1° vs. 68.0° average (1991–2020)
75.1°F
Warmest month ever
July 2003
72.3°F
Warmest August ever
2020
8
Days ≥ 90°F
in August
99°F
Hottest of 2026
Jul 26

Longest 90°F Streak in August

4 consecutive days with highs of at least 90°F (Aug 8–11, 2026, peaking at 97°F)

The longest August streak since 2024 (2 years). The August record is 7 days, set in 2020.

Average August Temperature by Year

1873–2026 · 2026 highlighted · trend +0.20° per decade (warming since 1873)

Precipitation — August 2026

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

2.85"
Total precipitation
August 2026
+1.34"
vs. average
Normal: 1.51" · 189% of normal
14th-wettest
August rank
of 155 on record
6.73"
Wettest August ever
1930 · driest 0.03" (1944)

August Precipitation by Year

1871–2026 · 2026 highlighted · trend +0.01" per decade (wetter since 1871)

Wettest Augusts on Record

# Year Total
1 1930 6.73"
2 1985 6.64"
3 2008 6.55"
4 1997 4.33"
5 1927 4.04"
6 1915 3.98"
7 2023 3.47"
8 2024 3.24"
9 1890 3.18"
10 1961 3.12"

Driest Augusts on Record

# Year Total
1 1944 0.03"
2 2012 0.14"
3 1970 0.14"
4 2020 0.20"
5 1924 0.23"
6 1882 0.23"
7 1876 0.26"
8 1973 0.27"
9 1964 0.28"
10 2010 0.34"

Warmest Augusts on Record

# Year Avg Temp
1 2020 72.3°F
2 2022 71.8°F
3 1995 71.6°F
4 1937 71.1°F
5 2026 71.1°F
6 2011 70.8°F
7 1970 70.7°F
8 2003 70.7°F
9 1969 70.6°F
10 2007 70.6°F

Warmest Months on Record (Any Month)

# Month Avg Temp
1 July 2003 75.1°F
2 July 1966 74.4°F
3 July 2026 74.1°F
4 July 2002 73.6°F
5 July 2022 73.4°F
6 July 1934 72.7°F
7 July 1963 72.7°F
8 July 1936 72.4°F
9 July 2021 72.4°F
10 July 2012 72.3°F

Nearby Stations — August 2026

How the same month ranked at the closest reporting stations

Station Avg Temp August Rank
Cheyenne, WY 71.1°F 5th of 154
Scottsbluff, NE 74.9°F 15th of 130
Denver, CO 76.3°F 4th of 155
Casper, WY 71.5°F 16th of 87
Colorado Springs, CO 73.8°F 4th of 128
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 1,841 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
 Aug 21
so far
 Aug 22 Jun 21, 1875 Sep 17, 2000 +1.3 d/decade
Last 80°F day
The last genuinely warm afternoon
 Sep 6
so far
 Sep 30 Aug 28, 1965 Oct 27, 1983 +0.7 d/decade
First high below 50°F
The first afternoon that stays cold
 not yet Sep 27 Jul 3, 1972 Oct 28, 1894 +0.2 d/decade
First 32°F freeze
Growing season over
 not yet Sep 30 Aug 24, 1910 Oct 27, 1963 +1.1 d/decade
First 28°F hard freeze
Cold enough to end tender growth
 not yet Oct 8 Aug 25, 1910 Nov 3, 2014 +0.8 d/decade
First 20°F night
Winter cold arriving
 not yet Oct 28 Sep 15, 1903 Nov 28, 1965 +0.3 d/decade
First measurable snow
0.1" or more in a day
 not yet Oct 6 Sep 8, 1929 Nov 20, 1900 -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 1873 · trending +1.1 days later per decade

136
Normal length
1991–2020 average
177
Longest on record
1981
86
Shortest on record
1876

Growing Season Length by Year

Days between the last spring freeze and the first fall freeze · trending +2.1 days longer per decade

Fall Average Temperature by Year

1873–2025 · 2026 highlighted · trend +0.15° per decade (warming since 1873)

Fall Precipitation by Year

1871–2025 · 2026 highlighted · trend +0.03" 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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