Weather on June 21
Saint Louis, MO
55 Years of Data
Avg High
88°F
Avg Low
67°F
Warmest
2025
87°F avg
Coldest
1992
58°F avg
About This Date
June 21st 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 June 21st was in 2025 (87°F average), while the coldest was 1992 (58°F) — a 29°F range across recorded history. Rain or other precipitation has occurred on about 25% of June 21st dates historically, with the wettest June 21st recording 6.86" of rain. The last decade has been 4.0°F warmer on this date compared to 20-30 years ago.
The last decade has been 4.0°F warmer on this date compared to 20-30 years ago.
Planning for June 21st in Saint Louis, MO? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
0.7°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025warmest | 96° | 77° | 87° | — | — |
| 2024 | 94° | 68° | 81° | — | — |
| 2023 | 89° | 67° | 78° | — | — |
| 2022 | 97° | 65° | 81° | — | — |
| 2021 | 77° | 56° | 66° | — | — |
| 2020 | 87° | 66° | 77° | 6.86" | — |
| 2019 | 79° | 64° | 71° | 2.39" | — |
| 2018 | 90° | 76° | 83° | — | — |
| 2017 | 90° | 73° | 81° | — | — |
| 2016 | 95° | 73° | 84° | 0.03" | — |
| 2015 | 88° | 69° | 78° | 0.81" | — |
| 2014 | 93° | 71° | 82° | 0.86" | — |
| 2013 | 91° | 74° | 82° | — | — |
| 2012 | 95° | 75° | 85° | — | — |
| 2011 | 90° | 68° | 79° | 0.74" | — |
| 2010 | 94° | 75° | 84° | — | — |
| 2009 | 91° | 73° | 82° | — | — |
| 2008 | 78° | 62° | 70° | — | — |
| 2007 | 85° | 62° | 73° | — | — |
| 2006 | 92° | 74° | 83° | — | — |
| 2005 | 82° | 60° | 71° | — | — |
| 2004 | 76° | 62° | 69° | — | — |
| 2003 | 80° | 59° | 70° | — | — |
| 2002 | 90° | 68° | 79° | — | — |
| 2001 | 81° | 67° | 74° | 0.74" | — |
| 2000 | 87° | 67° | 77° | 2.54" | — |
| 1999 | 83° | 66° | 74° | — | — |
| 1998 | 78° | 68° | 73° | 0.71" | — |
| 1997 | 89° | 73° | 81° | — | — |
| 1996 | 91° | 72° | 81° | — | — |
| 1995 | 92° | 67° | 79° | 0.05" | — |
| 1994 | 93° | 73° | 83° | — | — |
| 1993 | 87° | 68° | 78° | — | — |
| 1992coldest | 70° | 47° | 58° | — | — |
| 1991 | 88° | 68° | 78° | 0.1" | — |
| 1990 | 88° | 64° | 76° | — | — |
| 1989 | 90° | 67° | 78° | — | — |
| 1988 | 99° | 72° | 85° | — | — |
| 1987 | 93° | 67° | 80° | — | — |
| 1986 | 94° | 66° | 80° | — | — |
| 1985 | 85° | 63° | 74° | — | — |
| 1984 | 92° | 71° | 81° | — | — |
| 1981 | 86° | 68° | 77° | 0.69" | — |
| 1980 | 85° | 65° | 75° | — | — |
| 1979 | 94° | 66° | 80° | — | — |
| 1978 | 79° | — | — | — | — |
| 1977 | 89° | 60° | 75° | — | — |
| 1976 | 82° | 51° | 67° | — | — |
| 1975 | 90° | 66° | 78° | 0.13" | — |
| 1974 | 80° | 72° | 76° | — | — |
| 1973 | 85° | 66° | 75° | — | — |
| 1972 | 84° | 57° | 71° | — | — |
| 1971 | 93° | 71° | 82° | — | — |
53 years of data from ST LOUIS ST LOUIS UNIV