Lewiston, ID
Idaho · Records since 1881–2026
Records for August 11
🔥 Record High
August 11, 1939
+15° from 92° normal❄ Record Low
August 11, 1954
-13° from 62° normalAll-Time Records — Lewiston
Top 10 Record Highs — August 11
| # | Temp | Date |
|---|---|---|
| 🏆 | 107°F | August 11, 1939 |
| 2 | 107°F | August 11, 1906 |
| 3 | 105°F | August 11, 2014 |
| 4 | 105°F | August 11, 1971 |
| 5 | 104°F | August 11, 1981 |
| 6 | 104°F | August 11, 1940 |
| 7 | 103°F | August 11, 2021 |
| 8 | 103°F | August 11, 2015 |
| 9 | 103°F | August 11, 1929 |
| 10 | 102°F | August 11, 2025 |
Top 5 Record Lows — August 11
| # | Temp | Date |
|---|---|---|
| 🥶 | 49°F | August 11, 1954 |
| 2 | 50°F | August 11, 2007 |
| 3 | 50°F | August 11, 1991 |
| 4 | 52°F | August 11, 1907 |
| 5 | 52°F | August 11, 1895 |
Heat Wave Summary — Lewiston
threshold: 100°F (90th percentile of historical Jun–Aug highs)2026 Daily High Temperature vs Normal
Year to date132 of 221 days with data were above the 1991–2020 normal high for their date.
Days ≥ 90°F Per Year
1882–2026Average Daily High by Decade
Full year · complete decades only
Longest Heat Waves — Lewiston
| # | Dates | Days | Peak | Avg High | Avg Overnight Low |
|---|---|---|---|---|---|
| 🏆 | Jun 26, 2021 – Jul 6, 2021 | 11 | 115°F (Jun 29) | 105°F | 71°F |
| 2 | Jul 13, 1938 – Jul 23, 1938 | 11 | 113°F (Jul 21) | 108°F | 65°F |
| 3 | Aug 14, 1897 – Aug 24, 1897 | 11 | 111°F (Aug 20) | 106°F | 60°F |
| 4 | Aug 10, 1967 – Aug 20, 1967 | 11 | 105°F (Aug 17) | 102°F | 64°F |
| 5 | Jun 26, 2015 – Jul 4, 2015 | 9 | 111°F (Jun 28) | 104°F | 70°F |
| 6 | Aug 2, 1942 – Aug 10, 1942 | 9 | 108°F (Aug 7) | 105°F | 62°F |
| 7 | Jul 27, 1973 – Aug 4, 1973 | 9 | 104°F (Aug 1) | 102°F | 65°F |
| 8 | Jul 22, 1939 – Jul 29, 1939 | 8 | 117°F (Jul 27) | 108°F | 68°F |
| 9 | Jul 14, 1941 – Jul 21, 1941 | 8 | 112°F (Jul 17) | 105°F | 68°F |
| 10 | Jul 7, 2024 – Jul 14, 2024 | 8 | 108°F (Jul 10) | 104°F | 68°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
54th-warmest month on record
37th-warmest July of 133 on record
+1.7° vs. 75.6° average (1991–2020)Longest 90°F Streak in July
5 consecutive days with highs of at least 90°F (Jul 15–19, 2026, peaking at 102°F)
The longest July streak since 2025 (1 year). The July record is 25 days, set in 1940.
Average July Temperature by Year
1882–2026 · 2026 highlighted
Warmest Julys on Record
| # | Year | Avg Temp |
|---|---|---|
| 1 | 2021 | 82.1°F |
| 2 | 1906 | 81.5°F |
| 3 | 2024 | 81.1°F |
| 4 | 2014 | 80.3°F |
| 5 | 1925 | 80.3°F |
| 6 | 2007 | 80.3°F |
| 7 | 1938 | 80.1°F |
| 8 | 1985 | 79.9°F |
| 9 | 1941 | 79.9°F |
| 10 | 1937 | 79.4°F |
Warmest Months on Record (Any Month)
| # | Month | Avg Temp |
|---|---|---|
| 1 | July 2021 | 82.1°F |
| 2 | July 1906 | 81.5°F |
| 3 | July 2024 | 81.1°F |
| 4 | July 2014 | 80.3°F |
| 5 | July 1925 | 80.3°F |
| 6 | July 2007 | 80.3°F |
| 7 | July 1938 | 80.1°F |
| 8 | August 2022 | 80.1°F |
| 9 | July 1985 | 79.9°F |
| 10 | July 1941 | 79.9°F |
Nearby Stations — July 2026
How the same month ranked at the closest reporting stations
| Station | Avg Temp | July Rank |
|---|---|---|
| Lewiston, ID | 77.3°F | 37th of 133 |
| Pullman, WA | 68.0°F | 50th of 120 |
| Dworshak, ID | 75.9°F | 13th of 121 |
| Spokane, WA | 73.7°F | 19th of 146 |
| Pendleton, OR | 73.5°F | 56th of 131 |