Tri-Cities, WA
Washington · Records since 1894–2026
Records for August 11
🔥 Record High
August 11, 2021
+15° from 92° normal❄ Record Low
August 11, 2007
-13° from 57° normalAll-Time Records — Tri-Cities
Top 10 Record Highs — August 11
| # | Temp | Date |
|---|---|---|
| 🏆 | 107°F | August 11, 2021 |
| 2 | 106°F | August 11, 1898 |
| 3 | 103°F | August 11, 1981 |
| 4 | 102°F | August 11, 2017 |
| 5 | 102°F | August 11, 1996 |
| 6 | 102°F | August 11, 1971 |
| 7 | 102°F | August 11, 1929 |
| 8 | 101°F | August 11, 2025 |
| 9 | 101°F | August 11, 2004 |
| 10 | 101°F | August 11, 1967 |
Top 5 Record Lows — August 11
| # | Temp | Date |
|---|---|---|
| 🥶 | 44°F | August 11, 2007 |
| 2 | 47°F | August 11, 1896 |
| 3 | 48°F | August 11, 1940 |
| 4 | 48°F | August 11, 1918 |
| 5 | 48°F | August 11, 1907 |
Heat Wave Summary — Tri-Cities
threshold: 99°F (90th percentile of historical Jun–Aug highs)2026 Daily High Temperature vs Normal
Year to date123 of 221 days with data were above the 1991–2020 normal high for their date.
Days ≥ 90°F Per Year
1894–2026Average Daily High by Decade
Full year · complete decades only
Longest Heat Waves — Tri-Cities
| # | Dates | Days | Peak | Avg High | Avg Overnight Low |
|---|---|---|---|---|---|
| 🏆 | Jul 5, 2024 – Jul 21, 2024 | 17 | 109°F (Jul 9) | 103°F | 60°F |
| 2 | Jul 24, 2022 – Aug 3, 2022 | 11 | 112°F (Jul 29) | 105°F | 62°F |
| 3 | Aug 11, 1977 – Aug 21, 1977 | 11 | 110°F (Aug 17) | 104°F | 66°F |
| 4 | Jul 13, 1938 – Jul 23, 1938 | 11 | 109°F (Jul 21) | 104°F | 65°F |
| 5 | Jul 11, 1906 – Jul 21, 1906 | 11 | 108°F (Jul 12) | 103°F | 72°F |
| 6 | Aug 10, 1967 – Aug 20, 1967 | 11 | 105°F (Aug 17) | 102°F | 61°F |
| 7 | Aug 7, 1981 – Aug 16, 1981 | 10 | 105°F (Aug 9) | 102°F | 64°F |
| 8 | Jul 22, 1939 – Jul 30, 1939 | 9 | 115°F (Jul 27) | 105°F | 65°F |
| 9 | Jun 23, 2021 – Jul 1, 2021 | 9 | 115°F (Jun 27) | 107°F | 68°F |
| 10 | Jul 12, 1911 – Jul 20, 1911 | 9 | 114°F (Jul 16) | 107°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
56th-warmest month on record
41st-warmest July of 119 on record
+1.1° vs. 75.2° average (1991–2020)Longest 90°F Streak in July
8 consecutive days with highs of at least 90°F (Jul 21–28, 2026, peaking at 101°F)
The longest July streak since 2025 (1 year). The July record is 29 days, set in 1985.
Average July Temperature by Year
1894–2026 · 2026 highlighted
Warmest Julys on Record
| # | Year | Avg Temp |
|---|---|---|
| 1 | 2021 | 80.0°F |
| 2 | 1941 | 79.2°F |
| 3 | 1908 | 79.2°F |
| 4 | 1960 | 79.2°F |
| 5 | 1985 | 79.1°F |
| 6 | 1958 | 79.1°F |
| 7 | 1911 | 79.0°F |
| 8 | 2022 | 79.0°F |
| 9 | 1938 | 79.0°F |
| 10 | 2014 | 78.8°F |
Warmest Months on Record (Any Month)
| # | Month | Avg Temp |
|---|---|---|
| 1 | July 2021 | 80.0°F |
| 2 | July 1941 | 79.2°F |
| 3 | August 1898 | 79.2°F |
| 4 | July 1908 | 79.2°F |
| 5 | July 1960 | 79.2°F |
| 6 | July 1985 | 79.1°F |
| 7 | July 1958 | 79.1°F |
| 8 | July 1911 | 79.0°F |
| 9 | July 2022 | 79.0°F |
| 10 | July 1938 | 79.0°F |
Nearby Stations — July 2026
How the same month ranked at the closest reporting stations
| Station | Avg Temp | July Rank |
|---|---|---|
| Tri-Cities, WA | 76.2°F | 41st of 119 |
| Pendleton, OR | 73.5°F | 56th of 131 |
| Yakima, WA | 73.8°F | 21st of 80 |
| Pullman, WA | 68.0°F | 50th of 120 |
| Lewiston, ID | 77.3°F | 37th of 133 |