Weather on August 15
Saint Louis, MO
55 Years of Data
Avg High
86°F
Avg Low
67°F
Warmest
1988
89°F avg
Coldest
1992
62°F avg
About This Date
August 15th in Saint Louis, MO typically brings warm summer weather, with average highs around 86°F and lows near 67°F. Over 53 years of records, the warmest August 15th was in 1988 (89°F average), while the coldest was 1992 (62°F) — a 27°F range across recorded history. Rain or other precipitation has occurred on about 28% of August 15th dates historically, with the wettest August 15th recording 11.15" of rain. The last decade has been 3.1°F warmer on this date compared to 20-30 years ago.
The last decade has been 3.1°F warmer on this date compared to 20-30 years ago.
Planning for August 15th in Saint Louis, MO? Stay hydrated and seek shade during peak afternoon hours.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 96° | 72° | 84° | — | — |
| 2024 | 93° | 72° | 82° | 0.79" | — |
| 2023 | 76° | 60° | 68° | — | — |
| 2022 | 82° | 68° | 75° | — | — |
| 2021 | 83° | 61° | 72° | — | — |
| 2020 | 90° | 68° | 79° | — | — |
| 2019 | 86° | 63° | 74° | — | — |
| 2018 | 83° | 70° | 76° | — | — |
| 2017 | 90° | 77° | 83° | — | — |
| 2016 | — | 67° | — | 11.15" | — |
| 2015 | 87° | 71° | 79° | — | — |
| 2014 | 86° | 67° | 76° | — | — |
| 2013 | 75° | 59° | 67° | — | — |
| 2012 | 80° | 62° | 71° | — | — |
| 2011 | 85° | 59° | 72° | — | — |
| 2010 | 94° | 75° | 84° | — | — |
| 2009 | 87° | 65° | 76° | — | — |
| 2008 | 83° | 63° | 73° | — | — |
| 2007 | 100° | 75° | 88° | — | — |
| 2006 | 91° | 62° | 77° | 1.55" | — |
| 2005 | 81° | 69° | 75° | 0.58" | — |
| 2004 | 75° | 50° | 63° | — | — |
| 2003 | 92° | 74° | 83° | — | — |
| 2002 | 77° | 69° | 73° | — | — |
| 2001 | 79° | 55° | 67° | — | — |
| 2000 | 90° | 72° | 81° | — | — |
| 1999 | 80° | 55° | 68° | — | — |
| 1998 | 84° | 66° | 75° | — | — |
| 1997 | 78° | 69° | 74° | 2.95" | — |
| 1996 | 90° | 70° | 80° | — | — |
| 1995 | 94° | 75° | 84° | — | — |
| 1994 | 77° | 53° | 65° | — | — |
| 1993 | 92° | 72° | 82° | — | — |
| 1992coldest | 73° | 52° | 62° | — | — |
| 1991 | 88° | 64° | 76° | — | — |
| 1990 | 80° | 69° | 75° | 0.64" | — |
| 1989 | 86° | 64° | 75° | — | — |
| 1988warmest | 100° | 78° | 89° | — | — |
| 1987 | 92° | 78° | 85° | — | — |
| 1986 | 78° | 64° | 71° | 0.53" | — |
| 1985 | 77° | 64° | 71° | 1.02" | — |
| 1984 | 93° | 72° | 82° | — | — |
| 1981 | 91° | 70° | 80° | 2.79" | — |
| 1980 | 89° | 71° | 80° | 0.89" | — |
| 1979 | 80° | 58° | 69° | 0.38" | — |
| 1978 | 92° | 72° | 82° | — | — |
| 1977 | 91° | 67° | 79° | — | — |
| 1976 | 78° | 64° | 71° | 0.71" | — |
| 1975 | 86° | 70° | 78° | 2.13" | — |
| 1974 | 88° | 64° | 76° | — | — |
| 1973 | 84° | 60° | 72° | 0.08" | — |
| 1972 | 94° | 79° | 86° | — | — |
| 1971 | 92° | 65° | 78° | 0.23" | — |
53 years of data from ST LOUIS ST LOUIS UNIV