Ontario, OR
Oregon · Records since 1945–2026
Records for August 11
🔥 Record High
August 11, 1971
+12° from 95° normal❄ Record Low
August 11, 1970
-19° from 61° normalAll-Time Records — Ontario
Top 10 Record Highs — August 11
| # | Temp | Date |
|---|---|---|
| 🏆 | 107°F | August 11, 1971 |
| 2 | 106°F | August 11, 1996 |
| 3 | 106°F | August 11, 1960 |
| 4 | 105°F | August 11, 1958 |
| 5 | 104°F | August 11, 1992 |
| 6 | 104°F | August 11, 1967 |
| 7 | 102°F | August 11, 2021 |
| 8 | 102°F | August 11, 2015 |
| 9 | 102°F | August 11, 1981 |
| 10 | 102°F | August 11, 1972 |
Top 5 Record Lows — August 11
| # | Temp | Date |
|---|---|---|
| 🥶 | 42°F | August 11, 1970 |
| 2 | 43°F | August 11, 1947 |
| 3 | 45°F | August 11, 1995 |
| 4 | 46°F | August 11, 1953 |
| 5 | 47°F | August 11, 1985 |
Heat Wave Summary — Ontario
threshold: 102°F (90th percentile of historical Jun–Aug highs)2026 Daily High Temperature vs Normal
Year to date124 of 221 days with data were above the 1991–2020 normal high for their date.
Days ≥ 90°F Per Year
1945–2026Average Daily High by Decade
Full year · complete decades only
Longest Heat Waves — Ontario
| # | Dates | Days | Peak | Avg High | Avg Overnight Low |
|---|---|---|---|---|---|
| 🏆 | Jul 22, 1971 – Aug 14, 1971 | 24 | 110°F (Aug 8) | 106°F | 62°F |
| 2 | Jun 15, 1961 – Jun 26, 1961 | 12 | 108°F (Jun 17) | 105°F | 60°F |
| 3 | Aug 10, 1967 – Aug 20, 1967 | 11 | 109°F (Aug 19) | 106°F | 55°F |
| 4 | Jul 13, 1960 – Jul 22, 1960 | 10 | 112°F (Jul 19) | 107°F | 62°F |
| 5 | Jul 17, 1956 – Jul 26, 1956 | 10 | 107°F (Jul 23) | 104°F | 59°F |
| 6 | Jun 28, 2021 – Jul 7, 2021 | 10 | 107°F (Jun 30) | 105°F | 68°F |
| 7 | Jul 15, 1959 – Jul 23, 1959 | 9 | 111°F (Jul 21) | 107°F | 59°F |
| 8 | Jul 3, 1968 – Jul 11, 1968 | 9 | 108°F (Jul 4) | 105°F | 61°F |
| 9 | Jul 16, 2024 – Jul 24, 2024 | 9 | 108°F (Jul 22) | 105°F | 68°F |
| 10 | Jul 25, 1973 – Aug 2, 1973 | 9 | 107°F (Aug 2) | 105°F | 60°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
19th-warmest month on record
17th-warmest July of 70 on record
+1.8° vs. 77.9° average (1991–2020)Longest 90°F Streak in July
17 consecutive days with highs of at least 90°F (Jul 15–31, 2026, peaking at 104°F)
The longest July streak since 2024 (2 years). The July record is 31 days, set in 1967.
Average July Temperature by Year
1945–2026 · 2026 highlighted
Warmest Julys on Record
| # | Year | Avg Temp |
|---|---|---|
| 1 | 2021 | 85.1°F |
| 2 | 2022 | 82.8°F |
| 3 | 2007 | 82.3°F |
| 4 | 2024 | 82.1°F |
| 5 | 1960 | 81.7°F |
| 6 | 2017 | 81.7°F |
| 7 | 2023 | 81.6°F |
| 8 | 1985 | 81.6°F |
| 9 | 2003 | 81.3°F |
| 10 | 2013 | 81.0°F |
Warmest Months on Record (Any Month)
| # | Month | Avg Temp |
|---|---|---|
| 1 | July 2021 | 85.1°F |
| 2 | July 2022 | 82.8°F |
| 3 | July 2007 | 82.3°F |
| 4 | July 2024 | 82.1°F |
| 5 | August 2022 | 81.8°F |
| 6 | July 1960 | 81.7°F |
| 7 | July 2017 | 81.7°F |
| 8 | July 2023 | 81.6°F |
| 9 | July 1985 | 81.6°F |
| 10 | July 2003 | 81.3°F |
Nearby Stations — July 2026
How the same month ranked at the closest reporting stations
| Station | Avg Temp | July Rank |
|---|---|---|
| Ontario, OR | 79.8°F | 17th of 70 |
| Boise, ID | 81.0°F | 9th of 149 |
| Baker City, OR | 69.0°F | 21st of 99 |
| McCall, ID | 68.0°F | 6th of 103 |
| Stanley, ID | 62.6°F | 4th of 62 |