Challis, ID
Idaho · Records since 1895–2026
Records for August 11
🔥 Record High
August 11, 2018
+13° from 86° normal❄ Record Low
August 11, 1914
-18° from 51° normalAll-Time Records — Challis
Top 10 Record Highs — August 11
| # | Temp | Date |
|---|---|---|
| 🏆 | 99°F | August 11, 2018 |
| 2 | 98°F | August 11, 1969 |
| 3 | 98°F | August 11, 1928 |
| 4 | 95°F | August 11, 2003 |
| 5 | 95°F | August 11, 1958 |
| 6 | 95°F | August 11, 1940 |
| 7 | 95°F | August 11, 1933 |
| 8 | 94°F | August 11, 1955 |
| 9 | 94°F | August 11, 1929 |
| 10 | 93°F | August 11, 2014 |
Top 5 Record Lows — August 11
| # | Temp | Date |
|---|---|---|
| 🥶 | 33°F | August 11, 1914 |
| 2 | 39°F | August 11, 1947 |
| 3 | 40°F | August 11, 1900 |
| 4 | 41°F | August 11, 1952 |
| 5 | 42°F | August 11, 1948 |
Heat Wave Summary — Challis
threshold: 92°F (90th percentile of historical Jun–Aug highs)2026 Daily High Temperature vs Normal
Year to date167 of 222 days with data were above the 1991–2020 normal high for their date.
Days ≥ 90°F Per Year
1897–2026Average Daily High by Decade
Full year · complete decades only
Longest Heat Waves — Challis
| # | Dates | Days | Peak | Avg High | Avg Overnight Low |
|---|---|---|---|---|---|
| 🏆 | Jul 5, 2018 – Aug 2, 2018 | 29 | 99°F (Jul 9) | 95°F | 55°F |
| 2 | Jul 15, 1959 – Jul 27, 1959 | 13 | 101°F (Jul 23) | 95°F | 56°F |
| 3 | Jul 15, 1966 – Jul 27, 1966 | 13 | 98°F (Jul 20) | 95°F | 50°F |
| 4 | Jul 14, 1960 – Jul 24, 1960 | 11 | 102°F (Jul 20) | 98°F | 53°F |
| 5 | Jul 14, 2006 – Jul 23, 2006 | 10 | 101°F (Jul 22) | 97°F | 55°F |
| 6 | Jul 14, 2003 – Jul 23, 2003 | 10 | 100°F (Jul 20) | 97°F | 55°F |
| 7 | Aug 7, 2018 – Aug 15, 2018 | 9 | 102°F (Aug 10) | 96°F | 53°F |
| 8 | Jun 26, 2015 – Jul 4, 2015 | 9 | 100°F (Jun 28) | 97°F | 57°F |
| 9 | Jul 25, 2000 – Aug 2, 2000 | 9 | 99°F (Aug 1) | 95°F | 55°F |
| 10 | Aug 30, 2022 – Sep 7, 2022 | 9 | 99°F (Sep 3) | 96°F | 50°F |
Heat Waves Per Year
Warm Summer Nights (Jun–Aug)
Nights where the overnight low exceeded the 1991–2020 normal low
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
Monthly Precipitation — Last 24 Months
Blue = actual · dashed line = monthly normal
Annual Precipitation Per Year (1970–2026)
Blue = above average · tan = below average · gold = 2026 (partial)
Heavy Rain Days Per Year (≥ 1.0")
Compare year-to-year changes in days with heavy rainfall (≥ 1.0")
Month in Review — July 2026
Average temperature · July 2026
12th-warmest month on record
11th-warmest July of 105 on record
+2.5° vs. 69.5° average (1991–2020)Longest 90°F Streak in July
9 consecutive days with highs of at least 90°F (Jul 23–31, 2026, peaking at 98°F)
The longest July streak since 2023 (3 years). The July record is 27 days, set in 2018.
Average July Temperature by Year
1897–2026 · 2026 highlighted
Warmest Julys on Record
| # | Year | Avg Temp |
|---|---|---|
| 1 | 2021 | 74.0°F |
| 2 | 2018 | 73.8°F |
| 3 | 1985 | 73.4°F |
| 4 | 2007 | 73.1°F |
| 5 | 1960 | 73.0°F |
| 6 | 2003 | 72.4°F |
| 7 | 2006 | 72.3°F |
| 8 | 2024 | 72.2°F |
| 9 | 1988 | 72.2°F |
| 10 | 2014 | 72.1°F |
Warmest Months on Record (Any Month)
| # | Month | Avg Temp |
|---|---|---|
| 1 | July 2021 | 74.0°F |
| 2 | July 2018 | 73.8°F |
| 3 | July 1985 | 73.4°F |
| 4 | July 2007 | 73.1°F |
| 5 | July 1960 | 73.0°F |
| 6 | July 2003 | 72.4°F |
| 7 | August 1961 | 72.3°F |
| 8 | July 2006 | 72.3°F |
| 9 | July 2024 | 72.2°F |
| 10 | July 1988 | 72.2°F |
Nearby Stations — July 2026
How the same month ranked at the closest reporting stations
| Station | Avg Temp | July Rank |
|---|---|---|
| Challis, ID | 72.0°F | 11th of 105 |
| Stanley, ID | 62.6°F | 4th of 62 |
| Salmon, ID | 72.5°F | 8th of 108 |
| McCall, ID | 68.0°F | 6th of 103 |
| Boise, ID | 81.0°F | 9th of 149 |