Grand Junction, CO

Colorado · Records since 1893–2026

⛅ 81°F
Currently in Grand Junction
As of 12:15 PM MDT

Records for September 7

🔥 Record High

99°F

September 7, 2022

+14° from 85° normal

❄ Record Low

44°F

September 7, 2001

-12° from 56° normal
🌞 Normal high: 85°F 🌑 Normal low: 56°F 1991–2020 normals

All-Time Records — Grand Junction

🔥
107°F
Hottest Day Ever
Jul 17, 2023
❄
-23°F
Coldest Day Ever
Jan 13, 1963
🌧
1.87"
Wettest Day Ever
Sep 22, 1941
☃
14.0"
Most Snow in One Day
Nov 27, 1919

Top 10 Record Highs — September 7

# Temp Date
🏆 99°F September 7, 2022
2 98°F September 7, 1977
3 95°F September 7, 1998
4 95°F September 7, 1979
5 94°F September 7, 2013
6 94°F September 7, 1902
7 93°F September 7, 1983
8 93°F September 7, 1959
9 93°F September 7, 1908
10 92°F September 7, 2021

Top 5 Record Lows — September 7

# Temp Date
🥶 44°F September 7, 2001
2 45°F September 7, 2010
3 46°F September 7, 1970
4 46°F September 7, 1903
5 47°F September 7, 1929
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 1893–2026. Climate normals represent the 1991–2020 average.

Heat Wave Summary — Grand Junction

threshold: 98°F (90th percentile of historical Jun–Aug highs)
5.0
Avg heat wave length
days (historical)
101°
Avg peak temp
during heat waves
26
Dangerous nights 2026
Overnights ≥ 70°F
4
Heat waves 2026
so far

2026 Daily High Temperature vs Normal

Year to date
Above normal Below normal

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

Days ≥ 90°F Per Year

1893–2026
88
2026 so far
60
Avg/year 1970–2025
81
Avg/year (last 10 complete)
94
Most in a year (2024)

Average Daily High by Decade

Full year · complete decades only

Longest Heat Waves — Grand Junction

# Dates Days Peak Avg High Avg Overnight Low
🏆 Jul 10, 2003 – Jul 28, 2003 19 105°F (Jul 12) 101°F 70°F
2 Jul 24, 2026 – Aug 11, 2026 19 105°F (Aug 3) 101°F 70°F
3 Jul 16, 2023 – Jul 30, 2023 15 107°F (Jul 17) 101°F 70°F
4 Jun 17, 1974 – Jul 1, 1974 15 102°F (Jun 25) 100°F 63°F
5 Jul 5, 2002 – Jul 17, 2002 13 105°F (Jul 13) 102°F 68°F
6 Jul 9, 2024 – Jul 21, 2024 13 104°F (Jul 12) 100°F 71°F
7 Jul 27, 2024 – Aug 8, 2024 13 103°F (Aug 1) 100°F 68°F
8 Jul 2, 2021 – Jul 13, 2021 12 107°F (Jul 9) 100°F 68°F
9 Jul 17, 1931 – Jul 28, 1931 12 104°F (Jul 23) 101°F 70°F
10 Jun 22, 2012 – Jul 3, 2012 12 102°F (Jun 23) 100°F 70°F

Heat Waves Per Year

Warm Summer Nights (Jun–Aug)

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

72
2026 total
above-normal nights
45.8
Avg / summer
1970–2020
74
Most in a summer
1940

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

2.89"
2026 YTD
Normal: 5.90"
-3.01"
0.31"
September so far
September normal: 1.19"
-0.88"
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 · Grand Junction is 3.01" behind the normal pace

Monthly Precipitation — Last 24 Months

Blue = actual · dashed line = monthly normal

Annual Precipitation Per Year (1893–2026)

Blue = above average · tan = below average · gold = 2026 (partial)
Since 1893, annual totals have trended +0.03" per decade, about +0.4" 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

80.6°F

Average temperature · August 2026

21st-warmest month on record

2nd-warmest August of 134 on record

+4.3° vs. 76.3° average (1991–2020)
84.1°F
Warmest month ever
July 2003
81.1°F
Warmest August ever
2020
24
Days ≥ 90°F
in August
105°F
Hottest of 2026
Aug 3

Longest 90°F Streak in August

13 consecutive days with highs of at least 90°F (Aug 16–28, 2026, peaking at 101°F)

The longest August streak since 2025 (1 year). The August record is 28 days, set in 2020.

Average August Temperature by Year

1893–2026 · 2026 highlighted · trend +0.15° per decade (warming since 1893)

Precipitation — August 2026

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

0.53"
Total precipitation
August 2026
-0.39"
vs. average
Normal: 0.92" · 58% of normal
36th-driest
August rank
of 132 on record
3.65"
Wettest August ever
1921 · driest 0.04" (1956)

August Precipitation by Year

1893–2026 · 2026 highlighted · trend -0.03" per decade (drier since 1893)

Wettest Augusts on Record

# Year Total
1 1921 3.65"
2 1957 3.48"
3 2014 3.16"
4 1953 2.81"
5 1997 2.67"
6 1899 2.42"
7 1901 2.36"
8 1895 2.24"
9 1999 2.22"
10 1925 2.20"

Driest Augusts on Record

# Year Total
1 1956 0.04"
2 2020 0.07"
3 1975 0.09"
4 2019 0.14"
5 1996 0.15"
6 1962 0.15"
7 2012 0.16"
8 1900 0.19"
9 2004 0.20"
10 1950 0.21"

Warmest Augusts on Record

# Year Avg Temp
1 2020 81.1°F
2 2026 80.6°F
3 1983 80.3°F
4 1969 79.5°F
5 1994 79.4°F
6 2023 79.2°F
7 2011 79.1°F
8 1995 79.0°F
9 2019 78.9°F
10 2022 78.9°F

Warmest Months on Record (Any Month)

# Month Avg Temp
1 July 2003 84.1°F
2 July 2026 84.1°F
3 July 2023 83.3°F
4 July 2024 83.0°F
5 July 1934 82.5°F
6 July 2018 82.5°F
7 July 2021 82.0°F
8 July 1901 82.0°F
9 July 2002 81.8°F
10 July 2007 81.7°F

Nearby Stations — August 2026

How the same month ranked at the closest reporting stations

Station Avg Temp August Rank
Grand Junction, CO 80.6°F 2nd of 134
Alamosa, CO 67.5°F 1st of 96
Denver, CO 76.3°F 4th of 155
Colorado Springs, CO 73.8°F 4th of 128
Salt Lake City, UT 81.7°F 5th of 153
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 1,603 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 132 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 9 Aug 1, 1916 Sep 30, 2024 +0.7 d/decade
Last 80°F day
The last genuinely warm afternoon
 Sep 6
so far
 Oct 7 Sep 14, 1959 Oct 21, 2003 +0.5 d/decade
First high below 50°F
The first afternoon that stays cold
 not yet Oct 28 Sep 13, 1914 Nov 28, 2025
First 32°F freeze
Growing season over
 not yet Oct 12 Sep 15, 1903 Nov 26, 1965 -0.5 d/decade
First 28°F hard freeze
Cold enough to end tender growth
 not yet Oct 28 Sep 27, 1908 Nov 28, 1965 -0.1 d/decade
First 20°F night
Winter cold arriving
 not yet Nov 17 Oct 11, 2019 Dec 19, 1995 -0.4 d/decade
First measurable snow
0.1" or more in a day
 not yet Nov 14 Sep 18, 1965 Dec 26, 1944 -1.0 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 1893 · trending -0.5 days earlier per decade

169
Normal length
1991–2020 average
230
Longest on record
1914
136
Shortest on record
1978

Growing Season Length by Year

Days between the last spring freeze and the first fall freeze · trending -1.2 days shorter per decade

Fall Average Temperature by Year

1893–2025 · 2026 highlighted

Fall Precipitation by Year

1893–2025 · 2026 highlighted · trend +0.02" per decade (wetter since 1893)

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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