Stanley, ID

Idaho · Records since 1916–2026

⛅ 49°F Feels like 42°
Currently in Stanley
As of 12:15 PM MDT

Records for September 7

🔥 Record High

89°F

September 7, 2022

+15° from 74° normal

❄ Record Low

16°F

September 7, 1923

-16° from 32° normal
🌞 Normal high: 74°F 🌑 Normal low: 32°F 1991–2020 normals

All-Time Records — Stanley

🔥
96°F
Hottest Day Ever
Aug 10, 2018
❄
-54°F
Coldest Day Ever
Dec 23, 1983
🌧
2.08"
Wettest Day Ever
Oct 19, 2007
☃
20.0"
Most Snow in One Day
Feb 18, 1986

Top 10 Record Highs — September 7

# Temp Date
🏆 89°F September 7, 2022
2 86°F September 7, 2024
3 86°F September 7, 1979
4 85°F September 7, 2021
5 85°F September 7, 2017
6 82°F September 7, 1977
7 82°F September 7, 1966
8 82°F September 7, 1923
9 81°F September 7, 2018
10 81°F September 7, 2005

Top 5 Record Lows — September 7

# Temp Date
🥶 16°F September 7, 1923
2 18°F September 7, 1996
3 18°F September 7, 1917
4 19°F September 7, 2010
5 20°F September 7, 1976
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 1916–2026. Climate normals represent the 1991–2020 average.

Heat Wave Summary — Stanley

threshold: 86°F (90th percentile of historical Jun–Aug highs)
4.5
Avg heat wave length
days (historical)
90°
Avg peak temp
during heat waves
0
Dangerous nights 2026
Overnights ≥ 70°F
2
Heat waves 2026
so far

2026 Daily High Temperature vs Normal

Year to date
Above normal Below normal

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

Days ≥ 90°F Per Year

1922–2026
3
2026 so far
4
Avg/year 1970–2025
7
Avg/year (last 10 complete)
14
Most in a year (2021)

Average Daily High by Decade

Full year · complete decades only

Longest Heat Waves — Stanley

# Dates Days Peak Avg High Avg Overnight Low
🏆 Jul 21, 1994 – Jul 31, 1994 11 92°F (Jul 22) 89°F 44°F
2 Aug 9, 1967 – Aug 18, 1967 10 90°F (Aug 17) 88°F 32°F
3 Jun 26, 2015 – Jul 4, 2015 9 93°F (Jun 28) 90°F 43°F
4 Jul 16, 2024 – Jul 24, 2024 9 93°F (Jul 23) 90°F 43°F
5 Jul 27, 1969 – Aug 4, 1969 9 91°F (Jul 28) 89°F 34°F
6 Jul 24, 2026 – Aug 1, 2026 9 90°F (Jul 31) 87°F 41°F
7 Jul 31, 1992 – Aug 8, 1992 9 89°F (Aug 2) 88°F 36°F
8 Jul 19, 2013 – Jul 26, 2013 8 89°F (Jul 23) 87°F 35°F
9 Aug 21, 1969 – Aug 27, 1969 7 93°F (Aug 24) 91°F 31°F
10 Jul 8, 2024 – Jul 14, 2024 7 93°F (Jul 10) 89°F 41°F

Heat Waves Per Year

Warm Summer Nights (Jun–Aug)

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

49
2026 total
above-normal nights
29.9
Avg / summer
1970–2020
53
Most in a summer
2023

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

11.05"
2026 YTD
Normal: 11.30"
-0.25"
0.89"
September so far
September normal: 1.01"
-0.12"
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 · Stanley is 0.25" behind the normal pace

Monthly Precipitation — Last 24 Months

Blue = actual · dashed line = monthly normal

Annual Precipitation Per Year (1916–2026)

Blue = above average · tan = below average · gold = 2026 (partial)
Since 1916, annual totals have trended +0.74" per decade, about +8.1" 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

59.4°F

Average temperature · August 2026

25th-warmest month on record

9th-warmest August of 63 on record

+2.1° vs. 57.2° average (1991–2020)
64.5°F
Warmest month ever
July 2021
62.1°F
Warmest August ever
2022
91°F
Hottest of 2026
Aug 21

Average August Temperature by Year

1916–2026 · 2026 highlighted · trend +0.58° per decade (warming since 1916)

Precipitation — August 2026

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

0.34"
Total precipitation
August 2026
-0.10"
vs. average
Normal: 0.44" · 77% of normal
26th-driest
August rank
of 65 on record
2.74"
Wettest August ever
2023 · driest 0.00" (1988)

August Precipitation by Year

1916–2026 · 2026 highlighted · trend -0.02" per decade (drier since 1916)

Wettest Augusts on Record

# Year Total
1 2023 2.74"
2 1983 2.68"
3 1976 2.50"
4 1922 2.48"
5 1990 1.68"
6 1965 1.61"
7 2009 1.56"
8 1973 1.55"
9 1979 1.41"
10 1984 1.40"

Driest Augusts on Record

# Year Total
1 1996 0.00"
2 1994 0.00"
3 1992 0.00"
4 1988 0.00"
5 2016 0.02"
6 1969 0.03"
7 2001 0.06"
8 1985 0.08"
9 1967 0.08"
10 1924 0.08"

Warmest Augusts on Record

# Year Avg Temp
1 2022 62.1°F
2 2020 60.6°F
3 2017 60.2°F
4 1922 60.1°F
5 2023 59.8°F
6 1983 59.6°F
7 2019 59.5°F
8 1971 59.4°F
9 2026 59.4°F
10 1967 59.0°F

Warmest Months on Record (Any Month)

# Month Avg Temp
1 July 2021 64.5°F
2 July 2007 63.6°F
3 July 2017 62.9°F
4 July 2026 62.6°F
5 August 2022 62.1°F
6 July 2024 61.8°F
7 July 2006 61.6°F
8 July 2014 61.6°F
9 July 2018 61.3°F
10 July 2022 61.1°F

Nearby Stations — August 2026

How the same month ranked at the closest reporting stations

Station Avg Temp August Rank
Stanley, ID 59.4°F 9th of 63
Challis, ID 69.3°F 17th of 105
McCall, ID 65.8°F 5th of 103
Boise, ID 78.8°F 2nd of 150
Salmon, ID 69.7°F 14th of 111
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 728 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 65 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 2 Jun 28, 1977 Sep 6, 2022 +0.2 d/decade
Last 80°F day
The last genuinely warm afternoon
 Aug 27
so far
 Sep 15 Jul 23, 1986 Oct 10, 1996 +1.6 d/decade
First high below 50°F
The first afternoon that stays cold
 not yet Sep 20 Jul 1, 1997 Nov 7, 1987 +1.2 d/decade
First 32°F freeze
Growing season over
 Jul 2 Jul 9 7 days earlier Jul 1, 1918 Aug 31, 1990 +0.4 d/decade
First 28°F hard freeze
Cold enough to end tender growth
 Aug 4 Jul 30 5 days later Jul 1, 1918 Sep 17, 2025 +2.7 d/decade
First 20°F night
Winter cold arriving
 not yet Sep 21 Jul 1, 1918 Oct 23, 2015 +3.3 d/decade
First measurable snow
0.1" or more in a day
 not yet — Sep 20, 1986 Dec 10, 1965

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 1916 · trending +0.4 days later per decade

8
Freeze-free days
2026 growing season
12
Normal length
4 days shorter than normal
51
Longest on record
2021
0
Shortest on record
1971

Growing Season Length by Year

Days between the last spring freeze and the first fall freeze · trending +0.3 days longer per decade

Fall Average Temperature by Year

1916–2025 · 2026 highlighted · trend +0.19° per decade (warming since 1916)

Fall Precipitation by Year

1918–2025 · 2026 highlighted · trend +0.08" per decade (wetter since 1918)

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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