St Louis, MO
Missouri · Records since 1874–2026
Records for August 11
🔥 Record High
August 11, 1881
+15° from 89° normal❄ Record Low
August 11, 1967
-14° from 70° normalAll-Time Records — St Louis
Top 10 Record Highs — August 11
| # | Temp | Date |
|---|---|---|
| 🏆 | 104°F | August 11, 1881 |
| 2 | 102°F | August 11, 1941 |
| 3 | 102°F | August 11, 1918 |
| 4 | 101°F | August 11, 1944 |
| 5 | 101°F | August 11, 1874 |
| 6 | 100°F | August 11, 2010 |
| 7 | 100°F | August 11, 1926 |
| 8 | 100°F | August 11, 1894 |
| 9 | 99°F | August 11, 2005 |
| 10 | 99°F | August 11, 1995 |
Top 5 Record Lows — August 11
| # | Temp | Date |
|---|---|---|
| 🥶 | 56°F | August 11, 1967 |
| 2 | 56°F | August 11, 1930 |
| 3 | 57°F | August 11, 2004 |
| 4 | 58°F | August 11, 1931 |
| 5 | 59°F | August 11, 1982 |
Heat Wave Summary — St Louis
threshold: 96°F (90th percentile of historical Jun–Aug highs)2026 Daily High Temperature vs Normal
Year to date114 of 221 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 — St Louis
| # | Dates | Days | Peak | Avg High | Avg Overnight Low |
|---|---|---|---|---|---|
| 🏆 | Aug 12, 1936 – Aug 28, 1936 | 17 | 106°F (Aug 18) | 103°F | 78°F |
| 2 | Jun 20, 1901 – Jul 6, 1901 | 17 | 102°F (Jun 29) | 98°F | 78°F |
| 3 | Jul 4, 1936 – Jul 18, 1936 | 15 | 108°F (Jul 14) | 103°F | 77°F |
| 4 | Jul 15, 1901 – Jul 28, 1901 | 14 | 107°F (Jul 22) | 101°F | 79°F |
| 5 | Jul 7, 1980 – Jul 20, 1980 | 14 | 107°F (Jul 15) | 101°F | 79°F |
| 6 | Jun 27, 2012 – Jul 8, 2012 | 12 | 108°F (Jun 28) | 104°F | 78°F |
| 7 | Jun 21, 1931 – Jul 2, 1931 | 12 | 104°F (Jul 1) | 100°F | 75°F |
| 8 | Jul 24, 1953 – Aug 3, 1953 | 11 | 104°F (Jul 30) | 100°F | 76°F |
| 9 | Jul 12, 1932 – Jul 22, 1932 | 11 | 102°F (Jul 15) | 99°F | 73°F |
| 10 | Jun 23, 1952 – Jul 2, 1952 | 10 | 105°F (Jun 29) | 100°F | 77°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
82nd-warmest month on record
53rd-warmest July of 153 on record
+0.0° vs. 80.5° average (1991–2020)Longest 90°F Streak in July
4 consecutive days with highs of at least 90°F (Jul 25–28, 2026, peaking at 98°F)
The longest July streak since 2025 (1 year). The July record is 28 days, set in 1936.
Average July Temperature by Year
1874–2026 · 2026 highlighted
Warmest Julys on Record
| # | Year | Avg Temp |
|---|---|---|
| 1 | 2012 | 88.1°F |
| 2 | 1901 | 87.4°F |
| 3 | 1936 | 86.4°F |
| 4 | 1934 | 86.2°F |
| 5 | 2011 | 85.7°F |
| 6 | 1980 | 84.9°F |
| 7 | 1954 | 84.9°F |
| 8 | 2017 | 84.3°F |
| 9 | 1916 | 84.2°F |
| 10 | 1887 | 83.7°F |
Warmest Months on Record (Any Month)
| # | Month | Avg Temp |
|---|---|---|
| 1 | July 2012 | 88.1°F |
| 2 | July 1901 | 87.4°F |
| 3 | July 1936 | 86.4°F |
| 4 | July 1934 | 86.2°F |
| 5 | July 2011 | 85.7°F |
| 6 | July 1980 | 84.9°F |
| 7 | July 1954 | 84.9°F |
| 8 | August 1947 | 84.9°F |
| 9 | August 1936 | 84.7°F |
| 10 | August 2007 | 84.4°F |
Nearby Stations — July 2026
How the same month ranked at the closest reporting stations
| Station | Avg Temp | July Rank |
|---|---|---|
| St Louis, MO | 80.5°F | 53rd of 153 |
| Carbondale, IL | 79.1°F | 43rd of 119 |
| Springfield, IL | 76.7°F | 70th of 148 |
| Jefferson City, MO | 79.7°F | 30th of 125 |
| Quincy, IL | 78.0°F | 50th of 125 |