Dubuque, IA
Iowa · Records since 1874–2026
Records for August 11
🔥 Record High
August 11, 1941
+20° from 80° normal❄ Record Low
August 11, 2024
-13° from 61° normalAll-Time Records — Dubuque
Top 10 Record Highs — August 11
| # | Temp | Date |
|---|---|---|
| 🏆 | 100°F | August 11, 1941 |
| 2 | 97°F | August 11, 1881 |
| 3 | 97°F | August 11, 1874 |
| 4 | 94°F | August 11, 1923 |
| 5 | 94°F | August 11, 1905 |
| 6 | 93°F | August 11, 1947 |
| 7 | 93°F | August 11, 1944 |
| 8 | 93°F | August 11, 1935 |
| 9 | 93°F | August 11, 1899 |
| 10 | 92°F | August 11, 1995 |
Top 5 Record Lows — August 11
| # | Temp | Date |
|---|---|---|
| 🥶 | 48°F | August 11, 2024 |
| 2 | 49°F | August 11, 1967 |
| 3 | 50°F | August 11, 2012 |
| 4 | 50°F | August 11, 2004 |
| 5 | 50°F | August 11, 1982 |
Heat Wave Summary — Dubuque
threshold: 90°F (90th percentile of historical Jun–Aug highs)2026 Daily High Temperature vs Normal
Year to date131 of 222 days with data were above the 1991–2020 normal high for their date.
Days ≥ 90°F Per Year
1874–2026Average Daily High by Decade
Full year · complete decades only
Longest Heat Waves — Dubuque
| # | Dates | Days | Peak | Avg High | Avg Overnight Low |
|---|---|---|---|---|---|
| 🏆 | Jul 12, 1901 – Jul 27, 1901 | 16 | 106°F (Jul 21) | 98°F | 73°F |
| 2 | Jul 5, 1936 – Jul 18, 1936 | 14 | 110°F (Jul 14) | 103°F | 73°F |
| 3 | Jul 23, 1941 – Aug 4, 1941 | 13 | 100°F (Jul 29) | 94°F | 73°F |
| 4 | Jun 17, 1910 – Jun 26, 1910 | 10 | 95°F (Jun 23) | 92°F | 66°F |
| 5 | Jun 23, 1931 – Jul 1, 1931 | 9 | 103°F (Jun 28) | 100°F | 77°F |
| 6 | Jul 27, 1988 – Aug 4, 1988 | 9 | 101°F (Jul 31) | 97°F | 68°F |
| 7 | Jul 22, 1916 – Jul 30, 1916 | 9 | 100°F (Jul 28) | 97°F | 74°F |
| 8 | Jun 19, 1874 – Jun 27, 1874 | 9 | 98°F (Jun 24) | 94°F | 75°F |
| 9 | Aug 25, 1953 – Sep 2, 1953 | 9 | 96°F (Aug 31) | 93°F | 65°F |
| 10 | Aug 3, 1900 – Aug 11, 1900 | 9 | 95°F (Aug 5) | 92°F | 72°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
50th-warmest month on record
41st-warmest July of 151 on record
+3.5° vs. 71.9° average (1991–2020)Longest 90°F Streak in July
4 consecutive days with highs of at least 90°F (Jul 14–17, 2026, peaking at 92°F)
Ties the longest July streak since 2020 (6 years). The July record is 16 days, set in 1901.
Average July Temperature by Year
1874–2026 · 2026 highlighted
Warmest Julys on Record
| # | Year | Avg Temp |
|---|---|---|
| 1 | 1901 | 82.2°F |
| 2 | 1936 | 81.1°F |
| 3 | 1916 | 80.3°F |
| 4 | 1935 | 79.2°F |
| 5 | 1921 | 79.1°F |
| 6 | 2012 | 78.2°F |
| 7 | 1931 | 78.1°F |
| 8 | 1887 | 77.8°F |
| 9 | 1874 | 77.7°F |
| 10 | 1934 | 77.5°F |
Warmest Months on Record (Any Month)
| # | Month | Avg Temp |
|---|---|---|
| 1 | July 1901 | 82.2°F |
| 2 | July 1936 | 81.1°F |
| 3 | August 1947 | 80.6°F |
| 4 | July 1916 | 80.3°F |
| 5 | July 1935 | 79.2°F |
| 6 | July 1921 | 79.1°F |
| 7 | July 2012 | 78.2°F |
| 8 | July 1931 | 78.1°F |
| 9 | August 1900 | 78.0°F |
| 10 | July 1887 | 77.8°F |
Nearby Stations — July 2026
How the same month ranked at the closest reporting stations
| Station | Avg Temp | July Rank |
|---|---|---|
| Dubuque, IA | 75.3°F | 41st of 151 |
| Cedar Rapids, IA | 75.5°F | 43rd of 132 |
| Moline, IL | 76.5°F | 50th of 153 |
| Madison, WI | 74.5°F | 29th of 158 |
| Rockford, IL | 74.9°F | 46th of 128 |