Williston, ND
North Dakota · Records since 1894–2026
Records for August 11
🔥 Record High
August 11, 2018
+19° from 86° normal❄ Record Low
August 11, 1977
-17° from 56° normalAll-Time Records — Williston
Top 10 Record Highs — August 11
| # | Temp | Date |
|---|---|---|
| 🏆 | 105°F | August 11, 2018 |
| 2 | 102°F | August 11, 2000 |
| 3 | 102°F | August 11, 1928 |
| 4 | 100°F | August 11, 1965 |
| 5 | 99°F | August 11, 1984 |
| 6 | 99°F | August 11, 1981 |
| 7 | 98°F | August 11, 2006 |
| 8 | 98°F | August 11, 1972 |
| 9 | 98°F | August 11, 1969 |
| 10 | 97°F | August 11, 2009 |
Top 5 Record Lows — August 11
| # | Temp | Date |
|---|---|---|
| 🥶 | 39°F | August 11, 1977 |
| 2 | 39°F | August 11, 1964 |
| 3 | 40°F | August 11, 1916 |
| 4 | 41°F | August 11, 1914 |
| 5 | 42°F | August 11, 1952 |
Heat Wave Summary — Williston
threshold: 93°F (90th percentile of historical Jun–Aug highs)2026 Daily High Temperature vs Normal
Year to date113 of 221 days with data were above the 1991–2020 normal high for their date.
Days ≥ 90°F Per Year
1894–2026Average Daily High by Decade
Full year · complete decades only
Longest Heat Waves — Williston
| # | Dates | Days | Peak | Avg High | Avg Overnight Low |
|---|---|---|---|---|---|
| 🏆 | Aug 11, 2003 – Aug 19, 2003 | 9 | 103°F (Aug 14) | 99°F | 69°F |
| 2 | Aug 1, 1983 – Aug 7, 1983 | 7 | 107°F (Aug 6) | 102°F | 66°F |
| 3 | Jul 21, 1931 – Jul 27, 1931 | 7 | 105°F (Jul 25) | 100°F | 67°F |
| 4 | Aug 8, 1940 – Aug 14, 1940 | 7 | 99°F (Aug 9) | 95°F | 65°F |
| 5 | Aug 7, 2018 – Aug 12, 2018 | 6 | 108°F (Aug 12) | 100°F | 58°F |
| 6 | Jun 3, 1988 – Jun 8, 1988 | 6 | 105°F (Jun 7) | 100°F | 67°F |
| 7 | Jun 23, 1936 – Jun 28, 1936 | 6 | 104°F (Jun 24) | 96°F | 63°F |
| 8 | Aug 27, 1983 – Sep 1, 1983 | 6 | 104°F (Sep 1) | 99°F | 62°F |
| 9 | Jul 24, 1933 – Jul 29, 1933 | 6 | 103°F (Jul 26) | 98°F | 64°F |
| 10 | Aug 20, 1969 – Aug 25, 1969 | 6 | 103°F (Aug 22) | 98°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
19th-warmest month on record
14th-warmest July of 130 on record
+3.6° vs. 70.4° average (1991–2020)Longest 90°F Streak in July
4 consecutive days with highs of at least 90°F (Jul 23–26, 2026, peaking at 102°F)
Ties the longest July streak since 2024 (2 years). The July record is 9 days, set in 2006.
Average July Temperature by Year
1894–2026 · 2026 highlighted
Warmest Julys on Record
| # | Year | Avg Temp |
|---|---|---|
| 1 | 1936 | 80.7°F |
| 2 | 2017 | 76.9°F |
| 3 | 2021 | 76.6°F |
| 4 | 2007 | 75.9°F |
| 5 | 1989 | 75.7°F |
| 6 | 1957 | 75.5°F |
| 7 | 2012 | 75.0°F |
| 8 | 1983 | 74.9°F |
| 9 | 2006 | 74.8°F |
| 10 | 1939 | 74.6°F |
Warmest Months on Record (Any Month)
| # | Month | Avg Temp |
|---|---|---|
| 1 | July 1936 | 80.7°F |
| 2 | August 1983 | 78.0°F |
| 3 | June 1988 | 77.3°F |
| 4 | July 2017 | 76.9°F |
| 5 | July 2021 | 76.6°F |
| 6 | July 2007 | 75.9°F |
| 7 | July 1989 | 75.7°F |
| 8 | July 1957 | 75.5°F |
| 9 | July 2012 | 75.0°F |
| 10 | July 1983 | 74.9°F |
Nearby Stations — July 2026
How the same month ranked at the closest reporting stations
| Station | Avg Temp | July Rank |
|---|---|---|
| Williston, ND | 74.0°F | 14th of 130 |
| Glasgow, MT | 75.4°F | 11th of 129 |
| Bismarck, ND | 77.3°F | 3rd of 152 |
| Mobridge, SD | 79.0°F | 4th of 106 |
| Sheridan, WY | 76.1°F | 2nd of 120 |