Weather on September 30
Saint Louis, MO
55 Years of Data
Avg High
78°F
Avg Low
52°F
Warmest
2019
79°F avg
Coldest
1972
51°F avg
About This Date
September 30th in Saint Louis, MO typically brings pleasant fall weather, with average highs around 78°F and lows near 52°F — a 26°F daily swing. Over 53 years of records, the warmest September 30th was in 2019 (79°F average), while the coldest was 1972 (51°F) — a 28°F range across recorded history. Rain or other precipitation has occurred on about 15% of September 30th dates historically, with the wettest September 30th recording 2.51" of rain. The last decade has been 8.0°F warmer on this date compared to 20-30 years ago.
The last decade has been 8.0°F warmer on this date compared to 20-30 years ago.
Planning for September 30th in Saint Louis, MO? Great weather for outdoor activities.
Warming Trend
1.1°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 90° | 56° | 73° | — | — |
| 2024 | 82° | 63° | 72° | — | — |
| 2023 | 91° | 61° | 76° | — | — |
| 2022 | 73° | 39° | 56° | — | — |
| 2021 | 86° | 62° | 74° | — | — |
| 2020 | 83° | 45° | 64° | — | — |
| 2019warmest | 92° | 67° | 79° | — | — |
| 2018 | 84° | 53° | 69° | — | — |
| 2017 | 80° | 59° | 70° | — | — |
| 2016 | 68° | 57° | 63° | 0.03" | — |
| 2015 | 78° | 57° | 68° | 0.48" | — |
| 2014 | 86° | 61° | 73° | — | — |
| 2013 | 75° | 53° | 64° | — | — |
| 2012 | 76° | 54° | 65° | — | — |
| 2011 | 85° | 57° | 71° | — | — |
| 2010 | 78° | 53° | 66° | — | — |
| 2009 | 65° | 44° | 54° | — | — |
| 2008 | 75° | 55° | 65° | 0.64" | — |
| 2007 | 84° | 52° | 68° | — | — |
| 2006 | 66° | 46° | 56° | 0.03" | — |
| 2005 | 65° | 42° | 53° | — | — |
| 2004 | 69° | 44° | 57° | — | — |
| 2003 | 65° | 50° | 57° | — | — |
| 2002 | 84° | 55° | 70° | — | — |
| 2001 | 69° | 44° | 57° | — | — |
| 2000 | 76° | 47° | 61° | — | — |
| 1999 | 67° | 39° | 53° | — | — |
| 1998 | 89° | 65° | 77° | — | — |
| 1997 | 83° | 58° | 70° | — | — |
| 1996 | 75° | 47° | 61° | — | — |
| 1995 | 86° | 62° | 74° | — | — |
| 1994 | 90° | 54° | 72° | — | — |
| 1993 | 65° | 41° | 53° | — | — |
| 1992 | 71° | 38° | 54° | — | — |
| 1991 | 82° | 54° | 68° | — | — |
| 1990 | 71° | 44° | 58° | — | — |
| 1989 | 79° | 60° | 69° | — | — |
| 1988 | 81° | 64° | 72° | — | — |
| 1987 | 76° | 48° | 62° | — | — |
| 1986 | 75° | 63° | 69° | 2.51" | — |
| 1985 | 69° | 32° | 51° | 0.15" | — |
| 1982 | 87° | 52° | 69° | — | — |
| 1981 | 87° | 61° | 74° | — | — |
| 1980 | 80° | 44° | 62° | — | — |
| 1979 | 90° | 55° | 72° | — | — |
| 1978 | 84° | 56° | 70° | 0.2" | — |
| 1977 | 71° | 58° | 64° | — | — |
| 1976 | 73° | 49° | 61° | — | — |
| 1975 | 73° | 52° | 62° | — | — |
| 1974 | 69° | 48° | 59° | — | — |
| 1973 | 77° | 56° | 66° | — | — |
| 1972coldest | 61° | 42° | 51° | 0.3" | — |
| 1971 | 91° | — | — | — | — |
53 years of data from ST LOUIS ST LOUIS UNIV