Rapid City Downtown, SD
South Dakota · Records since 1888–2026
Records for August 11
🔥 Record High
August 11, 1969
+19° from 84° normal❄ Record Low
August 11, 2004
-16° from 61° normalAll-Time Records — Rapid City Downtown
Top 10 Record Highs — August 11
| # | Temp | Date |
|---|---|---|
| 🏆 | 103°F | August 11, 1969 |
| 2 | 102°F | August 11, 2022 |
| 3 | 100°F | August 11, 2000 |
| 4 | 100°F | August 11, 1959 |
| 5 | 100°F | August 11, 1949 |
| 6 | 99°F | August 11, 1936 |
| 7 | 98°F | August 11, 2006 |
| 8 | 98°F | August 11, 1965 |
| 9 | 98°F | August 11, 1928 |
| 10 | 97°F | August 11, 1957 |
Top 5 Record Lows — August 11
| # | Temp | Date |
|---|---|---|
| 🥶 | 45°F | August 11, 2004 |
| 2 | 45°F | August 11, 1939 |
| 3 | 45°F | August 11, 1902 |
| 4 | 47°F | August 11, 1916 |
| 5 | 48°F | August 11, 1964 |
Heat Wave Summary — Rapid City Downtown
threshold: 94°F (90th percentile of historical Jun–Aug highs)2026 Daily High Temperature vs Normal
Year to date153 of 221 days with data were above the 1991–2020 normal high for their date.
Days ≥ 90°F Per Year
1888–2026Average Daily High by Decade
Full year · complete decades only
Longest Heat Waves — Rapid City Downtown
| # | Dates | Days | Peak | Avg High | Avg Overnight Low |
|---|---|---|---|---|---|
| 🏆 | Jul 2, 1936 – Jul 11, 1936 | 10 | 106°F (Jul 5) | 102°F | 71°F |
| 2 | Jul 21, 1931 – Jul 27, 1931 | 7 | 105°F (Jul 25) | 100°F | 70°F |
| 3 | Jul 10, 2026 – Jul 16, 2026 | 7 | 105°F (Jul 12) | 101°F | 68°F |
| 4 | Jul 18, 2012 – Jul 24, 2012 | 7 | 103°F (Jul 19) | 98°F | 68°F |
| 5 | Sep 4, 1931 – Sep 10, 1931 | 7 | 101°F (Sep 7) | 98°F | 64°F |
| 6 | Jul 24, 2026 – Jul 29, 2026 | 6 | 110°F (Jul 25) | 102°F | 70°F |
| 7 | Jul 8, 1954 – Jul 13, 1954 | 6 | 107°F (Jul 9) | 101°F | 70°F |
| 8 | Jul 21, 1936 – Jul 26, 1936 | 6 | 106°F (Jul 23) | 99°F | 68°F |
| 9 | Jul 17, 1934 – Jul 22, 1934 | 6 | 104°F (Jul 18) | 100°F | 70°F |
| 10 | Jul 14, 1936 – Jul 19, 1936 | 6 | 104°F (Jul 19) | 100°F | 70°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
2nd-warmest month on record
2nd-warmest July of 115 on record
+7.0° vs. 73.8° average (1991–2020)Longest 90°F Streak in July
11 consecutive days with highs of at least 90°F (Jul 10–20, 2026, peaking at 105°F)
Ties the longest July streak since 1964 (62 years). The July record is 13 days, set in 1934.
Average July Temperature by Year
1888–2026 · 2026 highlighted
Warmest Julys on Record
| # | Year | Avg Temp |
|---|---|---|
| 1 | 1936 | 82.4°F |
| 2 | 2026 | 80.7°F |
| 3 | 2012 | 79.2°F |
| 4 | 2017 | 78.4°F |
| 5 | 2006 | 78.3°F |
| 6 | 2007 | 78.1°F |
| 7 | 1954 | 77.9°F |
| 8 | 1966 | 77.8°F |
| 9 | 2021 | 77.5°F |
| 10 | 2003 | 77.5°F |
Warmest Months on Record (Any Month)
| # | Month | Avg Temp |
|---|---|---|
| 1 | July 1936 | 82.4°F |
| 2 | July 2026 | 80.7°F |
| 3 | July 2012 | 79.2°F |
| 4 | July 2017 | 78.4°F |
| 5 | July 2006 | 78.3°F |
| 6 | July 2007 | 78.1°F |
| 7 | July 1954 | 77.9°F |
| 8 | July 1966 | 77.8°F |
| 9 | July 2021 | 77.5°F |
| 10 | July 2003 | 77.5°F |
Nearby Stations — July 2026
How the same month ranked at the closest reporting stations
| Station | Avg Temp | July Rank |
|---|---|---|
| Rapid City Downtown, SD | 80.7°F | 2nd of 115 |
| Rapid City, SD | 79.3°F | 2nd of 84 |
| Scottsbluff, NE | 79.1°F | 3rd of 130 |
| Valentine, NE | 78.9°F | 13th of 138 |
| Mobridge, SD | 79.0°F | 4th of 106 |