Stanley, ID

Idaho · Records since 1916–2026

☀️ 63°F Feels like 57°
Currently in Stanley
As of 12:30 PM MDT

Records for September 11

🔥 Record High

85°F

September 11, 2022

+13° from 72° normal

❄ Record Low

14°F

September 11, 1921

-17° from 31° normal
🌞 Normal high: 72°F 🌑 Normal low: 31°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

First & Last Dates — Stanley

How early and how late each seasonal turning point has ever arrived, across the full period of record

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Range ever recorded Normal date (1991–2020)
51 days
Longest growing season
2021
0 days
Shortest growing season
1971
12 days
Normal growing season
1991–2020 average

Top 10 Record Highs — September 11

# Temp Date
🏆 85°F September 11, 2022
2 85°F September 11, 2017
3 84°F September 11, 1996
4 84°F September 11, 1981
5 84°F September 11, 1968
6 83°F September 11, 2015
7 82°F September 11, 2020
8 82°F September 11, 2013
9 82°F September 11, 2009
10 82°F September 11, 1990

Top 5 Record Lows — September 11

# Temp Date
🥶 14°F September 11, 1921
2 16°F September 11, 1979
3 17°F September 11, 1982
4 17°F September 11, 1926
5 17°F September 11, 1916
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

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

Annual totals and trend across the full period of record · see this year's standing →

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")

This Year — 2026

How Stanley is tracking against normal, year to date

Daily High Temperature vs Normal

Above normal Below normal

151 of 253 days with data were above the 1991–2020 normal high for their date.

Precipitation, Year to Date

11.05"
2026 YTD
Normal: 11.42"
-0.37"
0.89"
September so far
September normal: 1.01"
-0.12"
0
2026 heavy rain days
Days with ≥ 1.0"

Accumulation vs. Normal

Running total since Jan 1 against the normal pace for the same date · Stanley is 0.37" behind the normal pace

Period Review — Jun 12 – Sep 10, 2026

Any window, evaluated against every other year on record — 91 days

Quick picks: Last 7 days Last 30 days Last 90 days This month
Seasons: Spring (Mar–May) Summer (Jun–Aug) Fall (Sep–Nov)
58.0°F
Average temperature
6th-warmest of 61
+2.1°
vs. average
Normal: 55.9°F (1991–2020)
3.81"
Precipitation
8th-wettest of 42
+1.98"
vs. average
Normal: 1.83" · 208% of normal

Average Temperature by Year — Jun 12 – Sep 10

1916–2026 · 2026 highlighted · trend +0.48° per decade (warming since 1916)

Precipitation by Year — Jun 12 – Sep 10

1920–2026 · 2026 highlighted · trend -0.17" per decade (drier since 1920)

Warmest Jun 12 – Sep 10 on Record

# Year Avg Temp
1 2021 60.5°F
2 2017 60.1°F
3 2022 59.2°F
4 2025 58.4°F
5 2024 58.3°F
6 2013 58.0°F
7 2026 58.0°F
8 2007 57.9°F
9 1922 57.9°F
10 2018 57.9°F

Coolest Jun 12 – Sep 10 on Record

# Year Avg Temp
1 1920 49.9°F
2 1921 50.0°F
3 1924 50.9°F
4 1993 51.0°F
5 1928 51.8°F
6 1916 52.2°F
7 1976 52.6°F
8 1917 53.0°F
9 1918 53.2°F
10 1964 53.2°F

Wettest Jun 12 – Sep 10 on Record

# Year Total
1 1973 5.40"
2 1983 5.34"
3 1965 5.05"
4 1922 4.94"
5 1923 4.48"
6 1970 4.44"
7 1976 4.09"
8 2026 3.81"
9 1978 3.69"
10 1998 3.68"

Driest Jun 12 – Sep 10 on Record

# Year Total
1 1996 0.21"
2 1966 0.35"
3 2016 0.69"
4 1989 0.78"
5 2012 0.91"
6 1964 1.22"
7 2006 1.30"
8 2005 1.36"
9 1999 1.37"
10 2003 1.38"
About this data. Pick any start and end date and this becomes the same kind of review as the Month and Fall tabs, just for exactly the window you asked for — the generalized version of the same engine, evaluated across every year on record. Average temperature is the mean of each day's (high + low) / 2; precipitation is the sum of daily totals. A year missing more than about a fifth of the window's days is excluded from the temperature ranking; any missing day excludes a year from the precipitation ranking, since an unreported day is unreported rain. Ranges that cross from December into January aren't supported yet. Normals are the 1991–2020 mean for the same window.
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