Aberdeen, SD
South Dakota · Records since 1893–2026
Records for August 11
🔥 Record High
August 11, 1988
+19° from 84° normal❄ Record Low
August 11, 1902
-24° from 58° normalAll-Time Records — Aberdeen
Top 10 Record Highs — August 11
| # | Temp | Date |
|---|---|---|
| 🏆 | 103°F | August 11, 1988 |
| 2 | 103°F | August 11, 1965 |
| 3 | 102°F | August 11, 1959 |
| 4 | 102°F | August 11, 1936 |
| 5 | 99°F | August 11, 1969 |
| 6 | 99°F | August 11, 1949 |
| 7 | 99°F | August 11, 1922 |
| 8 | 99°F | August 11, 1907 |
| 9 | 97°F | August 11, 1958 |
| 10 | 96°F | August 11, 1987 |
Top 5 Record Lows — August 11
| # | Temp | Date |
|---|---|---|
| 🥶 | 34°F | August 11, 1902 |
| 2 | 38°F | August 11, 1977 |
| 3 | 40°F | August 11, 1968 |
| 4 | 40°F | August 11, 1952 |
| 5 | 41°F | August 11, 1951 |
Heat Wave Summary — Aberdeen
threshold: 94°F (90th percentile of historical Jun–Aug highs)2026 Daily High Temperature vs Normal
Year to date119 of 222 days with data were above the 1991–2020 normal high for their date.
Days ≥ 90°F Per Year
1893–2026Average Daily High by Decade
Full year · complete decades only
Longest Heat Waves — Aberdeen
| # | Dates | Days | Peak | Avg High | Avg Overnight Low |
|---|---|---|---|---|---|
| 🏆 | Jul 2, 1936 – Jul 19, 1936 | 18 | 115°F (Jul 6) | 107°F | 70°F |
| 2 | Jul 20, 1941 – Jul 29, 1941 | 10 | 109°F (Jul 23) | 102°F | 68°F |
| 3 | Jul 17, 1899 – Jul 25, 1899 | 9 | 106°F (Jul 21) | 100°F | 60°F |
| 4 | Jul 13, 1932 – Jul 21, 1932 | 9 | 106°F (Jul 19) | 100°F | 67°F |
| 5 | Jul 31, 1930 – Aug 8, 1930 | 9 | 105°F (Aug 1) | 100°F | 64°F |
| 6 | May 27, 1934 – Jun 3, 1934 | 8 | 110°F (May 30) | 99°F | 64°F |
| 7 | Jul 17, 1901 – Jul 24, 1901 | 8 | 107°F (Jul 22) | 103°F | 68°F |
| 8 | Aug 17, 1976 – Aug 24, 1976 | 8 | 104°F (Aug 17) | 100°F | 71°F |
| 9 | Jul 17, 1940 – Jul 24, 1940 | 8 | 103°F (Jul 24) | 100°F | 68°F |
| 10 | Jul 5, 1930 – Jul 11, 1930 | 7 | 111°F (Jul 10) | 102°F | 67°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
27th-warmest month on record
20th-warmest July of 131 on record
+3.8° vs. 71.8° average (1991–2020)Longest 90°F Streak in July
7 consecutive days with highs of at least 90°F (Jul 10–16, 2026, peaking at 93°F)
The longest July streak since 2021 (5 years). The July record is 30 days, set in 1936.
Average July Temperature by Year
1893–2026 · 2026 highlighted
Warmest Julys on Record
| # | Year | Avg Temp |
|---|---|---|
| 1 | 1936 | 84.8°F |
| 2 | 1935 | 78.7°F |
| 3 | 1930 | 78.6°F |
| 4 | 1975 | 78.3°F |
| 5 | 1901 | 77.8°F |
| 6 | 1974 | 77.4°F |
| 7 | 1933 | 77.3°F |
| 8 | 1931 | 77.1°F |
| 9 | 2012 | 76.7°F |
| 10 | 1937 | 76.7°F |
Warmest Months on Record (Any Month)
| # | Month | Avg Temp |
|---|---|---|
| 1 | July 1936 | 84.8°F |
| 2 | June 1933 | 79.1°F |
| 3 | July 1935 | 78.7°F |
| 4 | July 1930 | 78.6°F |
| 5 | July 1975 | 78.3°F |
| 6 | August 1937 | 78.2°F |
| 7 | July 1901 | 77.8°F |
| 8 | July 1974 | 77.4°F |
| 9 | July 1933 | 77.3°F |
| 10 | July 1931 | 77.1°F |
Nearby Stations — July 2026
How the same month ranked at the closest reporting stations
| Station | Avg Temp | July Rank |
|---|---|---|
| Aberdeen, SD | 75.6°F | 20th of 131 |
| Sisseton, SD | 74.5°F | 23rd of 90 |
| Huron, SD | 78.1°F | 14th of 146 |
| Mobridge, SD | 79.0°F | 4th of 106 |
| Mitchell, SD | 78.7°F | 17th of 127 |