Duluth, MN
Minnesota · Records since 1874–2026
Records for August 11
🔥 Record High
August 11, 1947
+17° from 77° normal❄ Record Low
August 11, 1982
-19° from 56° normalAll-Time Records — Duluth
Top 10 Record Highs — August 11
| # | Temp | Date |
|---|---|---|
| 🏆 | 94°F | August 11, 1947 |
| 2 | 91°F | August 11, 2018 |
| 3 | 88°F | August 11, 1988 |
| 4 | 88°F | August 11, 1965 |
| 5 | 88°F | August 11, 1958 |
| 6 | 87°F | August 11, 2007 |
| 7 | 86°F | August 11, 2010 |
| 8 | 86°F | August 11, 1993 |
| 9 | 86°F | August 11, 1989 |
| 10 | 85°F | August 11, 2020 |
Top 5 Record Lows — August 11
| # | Temp | Date |
|---|---|---|
| 🥶 | 37°F | August 11, 1982 |
| 2 | 39°F | August 11, 1985 |
| 3 | 39°F | August 11, 1922 |
| 4 | 41°F | August 11, 1967 |
| 5 | 42°F | August 11, 1997 |
Heat Wave Summary — Duluth
threshold: 84°F (90th percentile of historical Jun–Aug highs)2026 Daily High Temperature vs Normal
Year to date105 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 — Duluth
| # | Dates | Days | Peak | Avg High | Avg Overnight Low |
|---|---|---|---|---|---|
| 🏆 | Aug 1, 1930 – Aug 8, 1930 | 8 | 97°F (Aug 1) | 91°F | 65°F |
| 2 | Jul 1, 2020 – Jul 8, 2020 | 8 | 93°F (Jul 2) | 88°F | 62°F |
| 3 | Aug 1, 1878 – Aug 8, 1878 | 8 | 92°F (Aug 7) | 87°F | 66°F |
| 4 | Jul 7, 1936 – Jul 13, 1936 | 7 | 106°F (Jul 13) | 99°F | 71°F |
| 5 | Aug 22, 1969 – Aug 28, 1969 | 7 | 90°F (Aug 28) | 86°F | 58°F |
| 6 | Jul 4, 1988 – Jul 9, 1988 | 6 | 97°F (Jul 7) | 90°F | 63°F |
| 7 | Jul 23, 2006 – Jul 28, 2006 | 6 | 97°F (Jul 28) | 88°F | 62°F |
| 8 | Jul 12, 2006 – Jul 17, 2006 | 6 | 96°F (Jul 15) | 89°F | 64°F |
| 9 | Jun 8, 1956 – Jun 13, 1956 | 6 | 92°F (Jun 10) | 89°F | 59°F |
| 10 | Jul 11, 2012 – Jul 16, 2012 | 6 | 92°F (Jul 16) | 88°F | 64°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
4th-warmest month on record
4th-warmest July of 153 on record
+4.6° vs. 66.5° average (1991–2020)Longest 90°F Streak in July
3 consecutive days with highs of at least 90°F (Jul 12–14, 2026, peaking at 93°F)
Ties the longest July streak since 2013 (13 years). The July record is 7 days, set in 1936.
Average July Temperature by Year
1874–2026 · 2026 highlighted
Warmest Julys on Record
| # | Year | Avg Temp |
|---|---|---|
| 1 | 2006 | 71.9°F |
| 2 | 2012 | 71.9°F |
| 3 | 1881 | 71.7°F |
| 4 | 2026 | 71.2°F |
| 5 | 2019 | 71.1°F |
| 6 | 1921 | 70.9°F |
| 7 | 1936 | 70.6°F |
| 8 | 1878 | 70.3°F |
| 9 | 1988 | 69.9°F |
| 10 | 2020 | 69.9°F |
Warmest Months on Record (Any Month)
| # | Month | Avg Temp |
|---|---|---|
| 1 | July 2006 | 71.9°F |
| 2 | July 2012 | 71.9°F |
| 3 | July 1881 | 71.7°F |
| 4 | July 2026 | 71.2°F |
| 5 | July 2019 | 71.1°F |
| 6 | July 1921 | 70.9°F |
| 7 | July 1936 | 70.6°F |
| 8 | July 1878 | 70.3°F |
| 9 | August 1930 | 70.2°F |
| 10 | July 1988 | 69.9°F |
Nearby Stations — July 2026
How the same month ranked at the closest reporting stations
| Station | Avg Temp | July Rank |
|---|---|---|
| Duluth, MN | 71.2°F | 4th of 153 |
| Hibbing, MN | 69.5°F | 6th of 89 |
| Hayward, WI | 71.8°F | 5th of 51 |
| Ashland, WI | 70.0°F | 15th of 114 |
| Brainerd, MN | 74.0°F | 6th of 104 |