Hillsboro, OR
Oregon · Records since 1929–2026
Records for August 11
🔥 Record High
August 11, 1981
+21° from 83° normal❄ Record Low
August 11, 1931
-9° from 52° normalAll-Time Records — Hillsboro
Top 10 Record Highs — August 11
| # | Temp | Date |
|---|---|---|
| 🏆 | 104°F | August 11, 1981 |
| 2 | 103°F | August 11, 2021 |
| 3 | 101°F | August 11, 1977 |
| 4 | 101°F | August 11, 1971 |
| 5 | 101°F | August 11, 1961 |
| 6 | 98°F | August 11, 2025 |
| 7 | 98°F | August 11, 2014 |
| 8 | 98°F | August 11, 1930 |
| 9 | 97°F | August 11, 1990 |
| 10 | 97°F | August 11, 1970 |
Top 5 Record Lows — August 11
| # | Temp | Date |
|---|---|---|
| 🥶 | 43°F | August 11, 1931 |
| 2 | 44°F | August 11, 2020 |
| 3 | 44°F | August 11, 1966 |
| 4 | 44°F | August 11, 1959 |
| 5 | 44°F | August 11, 1942 |
Heat Wave Summary — Hillsboro
threshold: 92°F (90th percentile of historical Jun–Aug highs)2026 Daily High Temperature vs Normal
Year to date101 of 191 days with data were above the 1991–2020 normal high for their date.
Days ≥ 90°F Per Year
1930–2026Average Daily High by Decade
Full year · complete decades only
Longest Heat Waves — Hillsboro
| # | Dates | Days | Peak | Avg High | Avg Overnight Low |
|---|---|---|---|---|---|
| 🏆 | Aug 12, 1967 – Aug 20, 1967 | 9 | 98°F (Aug 15) | 96°F | 53°F |
| 2 | Jul 26, 2009 – Aug 2, 2009 | 8 | 106°F (Jul 29) | 99°F | 62°F |
| 3 | Jul 21, 1939 – Jul 28, 1939 | 8 | 103°F (Jul 26) | 97°F | 56°F |
| 4 | Jul 24, 2022 – Jul 31, 2022 | 8 | 102°F (Jul 30) | 98°F | 60°F |
| 5 | Jul 4, 2024 – Jul 10, 2024 | 7 | 103°F (Jul 9) | 98°F | 56°F |
| 6 | Aug 16, 1950 – Aug 22, 1950 | 7 | 98°F (Aug 17) | 97°F | 55°F |
| 7 | Sep 17, 1952 – Sep 23, 1952 | 7 | 97°F (Sep 22) | 95°F | 52°F |
| 8 | Jun 30, 2015 – Jul 6, 2015 | 7 | 97°F (Jul 1) | 95°F | 57°F |
| 9 | Jul 13, 1941 – Jul 18, 1941 | 6 | 104°F (Jul 15) | 100°F | 62°F |
| 10 | Aug 3, 1972 – Aug 8, 1972 | 6 | 104°F (Aug 6) | 98°F | 56°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
58th-warmest month on record
33rd-warmest July of 96 on record
+0.6° vs. 67.2° average (1991–2020)Longest 90°F Streak in July
2 consecutive days with highs of at least 90°F (Jul 21–22, 2026, peaking at 100°F)
The longest July streak since 2025 (1 year). The July record is 10 days, set in 1938.
Average July Temperature by Year
1930–2026 · 2026 highlighted
Warmest Julys on Record
| # | Year | Avg Temp |
|---|---|---|
| 1 | 1958 | 73.0°F |
| 2 | 1996 | 71.1°F |
| 3 | 2015 | 70.9°F |
| 4 | 2024 | 70.4°F |
| 5 | 2018 | 70.2°F |
| 6 | 2022 | 70.0°F |
| 7 | 2014 | 69.9°F |
| 8 | 2009 | 69.9°F |
| 9 | 1961 | 69.8°F |
| 10 | 1960 | 69.8°F |
Warmest Months on Record (Any Month)
| # | Month | Avg Temp |
|---|---|---|
| 1 | July 1958 | 73.0°F |
| 2 | August 1967 | 72.6°F |
| 3 | August 1961 | 72.2°F |
| 4 | August 2023 | 71.6°F |
| 5 | August 2017 | 71.3°F |
| 6 | August 2025 | 71.3°F |
| 7 | August 2022 | 71.2°F |
| 8 | August 1958 | 71.2°F |
| 9 | July 1996 | 71.1°F |
| 10 | July 2015 | 70.9°F |
Nearby Stations — July 2026
How the same month ranked at the closest reporting stations
| Station | Avg Temp | July Rank |
|---|---|---|
| Hillsboro, OR | 67.8°F | 33rd of 96 |
| Portland Downtown, OR | 69.6°F | 48th of 150 |
| Portland, OR | 70.7°F | 21st of 86 |
| Vancouver, WA | 69.8°F | 19th of 129 |
| McMinnville, OR | 67.4°F | 36th of 110 |