Bismarck, ND
North Dakota · Records since 1874–2026
Records for August 11
🔥 Record High
August 11, 2000
+19° from 85° normal❄ Record Low
August 11, 1977
-23° from 57° normalAll-Time Records — Bismarck
Top 10 Record Highs — August 11
| # | Temp | Date |
|---|---|---|
| 🏆 | 104°F | August 11, 2000 |
| 2 | 103°F | August 11, 1958 |
| 3 | 101°F | August 11, 1969 |
| 4 | 101°F | August 11, 1880 |
| 5 | 100°F | August 11, 2018 |
| 6 | 100°F | August 11, 1928 |
| 7 | 98°F | August 11, 1910 |
| 8 | 95°F | August 11, 2009 |
| 9 | 95°F | August 11, 1970 |
| 10 | 95°F | August 11, 1965 |
Top 5 Record Lows — August 11
| # | Temp | Date |
|---|---|---|
| 🥶 | 34°F | August 11, 1977 |
| 2 | 40°F | August 11, 1964 |
| 3 | 40°F | August 11, 1888 |
| 4 | 41°F | August 11, 1952 |
| 5 | 41°F | August 11, 1902 |
Heat Wave Summary — Bismarck
threshold: 93°F (90th percentile of historical Jun–Aug highs)2026 Daily High Temperature vs Normal
Year to date126 of 221 days with data were above the 1991–2020 normal high for their date.
Days ≥ 90°F Per Year
1875–2026Average Daily High by Decade
Full year · complete decades only
Longest Heat Waves — Bismarck
| # | Dates | Days | Peak | Avg High | Avg Overnight Low |
|---|---|---|---|---|---|
| 🏆 | Jul 4, 1936 – Jul 19, 1936 | 16 | 114°F (Jul 6) | 104°F | 73°F |
| 2 | Jul 15, 2021 – Jul 26, 2021 | 12 | 105°F (Jul 22) | 99°F | 66°F |
| 3 | Aug 11, 2003 – Aug 20, 2003 | 10 | 106°F (Aug 17) | 99°F | 66°F |
| 4 | Jun 17, 1988 – Jun 24, 1988 | 8 | 105°F (Jun 21) | 100°F | 63°F |
| 5 | Aug 21, 1969 – Aug 28, 1969 | 8 | 101°F (Aug 28) | 96°F | 65°F |
| 6 | Jul 5, 1974 – Jul 12, 1974 | 8 | 100°F (Jul 7) | 96°F | 60°F |
| 7 | Jul 25, 1988 – Jul 31, 1988 | 7 | 106°F (Jul 27) | 99°F | 58°F |
| 8 | Jul 10, 2006 – Jul 16, 2006 | 7 | 106°F (Jul 16) | 101°F | 60°F |
| 9 | Aug 24, 1991 – Aug 30, 1991 | 7 | 103°F (Aug 27) | 98°F | 63°F |
| 10 | Aug 17, 1976 – Aug 23, 1976 | 7 | 102°F (Aug 18) | 98°F | 61°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
3rd-warmest month on record
3rd-warmest July of 152 on record
+5.9° vs. 71.3° average (1991–2020)Longest 90°F Streak in July
8 consecutive days with highs of at least 90°F (Jul 9–16, 2026, peaking at 105°F)
The longest July streak since 2021 (5 years). The July record is 18 days, set in 1936.
100°F Milestone
Bismarck reached 107°F in 2026 — the first time it hit 100°F since 2023 (3 years).
Average July Temperature by Year
1875–2026 · 2026 highlighted
Warmest Julys on Record
| # | Year | Avg Temp |
|---|---|---|
| 1 | 1936 | 83.3°F |
| 2 | 2021 | 78.8°F |
| 3 | 2026 | 77.3°F |
| 4 | 2006 | 77.2°F |
| 5 | 1989 | 76.2°F |
| 6 | 1886 | 76.0°F |
| 7 | 2017 | 75.9°F |
| 8 | 1935 | 75.8°F |
| 9 | 2012 | 75.7°F |
| 10 | 2007 | 75.5°F |
Warmest Months on Record (Any Month)
| # | Month | Avg Temp |
|---|---|---|
| 1 | July 1936 | 83.3°F |
| 2 | July 2021 | 78.8°F |
| 3 | July 2026 | 77.3°F |
| 4 | July 2006 | 77.2°F |
| 5 | July 1989 | 76.2°F |
| 6 | July 1886 | 76.0°F |
| 7 | July 2017 | 75.9°F |
| 8 | July 1935 | 75.8°F |
| 9 | July 2012 | 75.7°F |
| 10 | June 1988 | 75.6°F |
Nearby Stations — July 2026
How the same month ranked at the closest reporting stations
| Station | Avg Temp | July Rank |
|---|---|---|
| Bismarck, ND | 77.3°F | 3rd of 152 |
| Mobridge, SD | 79.0°F | 4th of 106 |
| Aberdeen, SD | 75.6°F | 20th of 131 |
| Williston, ND | 74.0°F | 14th of 130 |
| Fargo, ND | 76.3°F | 3rd of 146 |