Weather on August 9
Saint Louis, MO
55 Years of Data
Avg High
88°F
Avg Low
67°F
Warmest
1980
86°F avg
Coldest
1976
65°F avg
About This Date
August 9th in Saint Louis, MO typically brings warm summer weather, with average highs around 88°F and lows near 67°F. Over 53 years of records, the warmest August 9th was in 1980 (86°F average), while the coldest was 1976 (65°F) — a 21°F range across recorded history. Rain or other precipitation has occurred on about 25% of August 9th dates historically, with the wettest August 9th recording 4.62" of rain. The last decade has been 1.5°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.5°F warmer on this date compared to 20-30 years ago.
Planning for August 9th in Saint Louis, MO? Stay hydrated and seek shade during peak afternoon hours.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 94° | 72° | 83° | — | — |
| 2024 | 79° | 61° | 70° | — | — |
| 2023 | 78° | 68° | 73° | 0.13" | — |
| 2022 | 80° | 66° | 73° | 1.04" | — |
| 2021 | 91° | 70° | 80° | 0.94" | — |
| 2020 | 89° | 70° | 79° | — | — |
| 2019 | 91° | 67° | 79° | — | — |
| 2018 | 90° | 72° | 81° | — | — |
| 2017 | 86° | 59° | 73° | — | — |
| 2016 | 88° | 71° | 79° | — | — |
| 2015 | 89° | 75° | 82° | — | — |
| 2014 | 82° | 70° | 76° | 0.03" | — |
| 2013 | 81° | 69° | 75° | 0.76" | — |
| 2012 | 100° | 70° | 85° | 0.1" | — |
| 2011 | 90° | 67° | 78° | — | — |
| 2010 | 93° | 75° | 84° | — | — |
| 2009 | 95° | 74° | 84° | — | — |
| 2008 | 81° | 62° | 71° | — | — |
| 2007 | 100° | 71° | 86° | — | — |
| 2006 | 88° | 74° | 81° | — | — |
| 2005 | 93° | 70° | 81° | — | — |
| 2004 | 82° | 62° | 72° | — | — |
| 2003 | 86° | 68° | 77° | — | — |
| 2002 | 82° | 59° | 71° | — | — |
| 2001 | 91° | 74° | 82° | — | — |
| 2000 | 86° | 70° | 78° | 0.08" | — |
| 1999 | 82° | 64° | 73° | — | — |
| 1998 | 80° | 69° | 75° | — | — |
| 1997 | 83° | 67° | 75° | 0.99" | — |
| 1996 | 84° | 58° | 71° | — | — |
| 1995 | 95° | 76° | 85° | — | — |
| 1994 | 90° | 70° | 80° | — | — |
| 1993 | 87° | 66° | 77° | — | — |
| 1992 | 95° | 74° | 84° | — | — |
| 1991 | 93° | 62° | 78° | 1.14" | — |
| 1990 | 80° | 62° | 71° | — | — |
| 1989 | 84° | 56° | 70° | — | — |
| 1988 | 100° | 71° | 86° | — | — |
| 1987 | 86° | 62° | 74° | 4.62" | — |
| 1986 | 89° | 61° | 75° | 0.43" | — |
| 1985 | 93° | 71° | 82° | — | — |
| 1984 | 96° | 76° | 86° | 4.06" | — |
| 1981 | 90° | 68° | 79° | — | — |
| 1980warmest | 100° | 71° | 86° | — | — |
| 1979 | 96° | 69° | 83° | — | — |
| 1978 | 78° | 60° | 69° | — | — |
| 1977 | 90° | 69° | 79° | 2.92" | — |
| 1976coldest | 80° | 50° | 65° | — | — |
| 1975 | 85° | 58° | 71° | — | — |
| 1974 | 90° | 69° | 79° | — | — |
| 1973 | 96° | 71° | 84° | — | — |
| 1972 | 85° | 59° | 72° | — | — |
| 1971 | 88° | — | — | — | — |
53 years of data from ST LOUIS ST LOUIS UNIV