Weather on September 30
Saint Louis, MO
55 Years of Data
About This Date
September 30th in Saint Louis, MO typically brings pleasant fall weather, with average highs around 78°F and lows near 53°F — a 25°F daily swing. Over 54 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 0.99" of rain. The last decade has been 8.9°F warmer on this date compared to 20-30 years ago.
The last decade has been 8.9°F warmer on this date compared to 20-30 years ago.
Planning for September 30th in Saint Louis, MO? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026 | 94° | 65° | 79° | — | — |
| 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° | 0.01" | — |
| 2015 | 78° | 57° | 68° | 0.19" | — |
| 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° | 0.25" | — |
| 2007 | 84° | 52° | 68° | — | — |
| 2006 | 66° | 46° | 56° | 0.01" | — |
| 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° | 0.99" | — |
| 1985 | 69° | 32° | 51° | 0.06" | — |
| 1982 | 87° | 52° | 69° | — | — |
| 1981 | 87° | 61° | 74° | — | — |
| 1980 | 80° | 44° | 62° | — | — |
| 1979 | 90° | 55° | 72° | — | — |
| 1978 | 84° | 56° | 70° | 0.08" | — |
| 1977 | 71° | 58° | 64° | — | — |
| 1976 | 73° | 49° | 61° | — | — |
| 1975 | 73° | 52° | 62° | — | — |
| 1974 | 69° | 48° | 59° | — | — |
| 1973 | 77° | 56° | 66° | — | — |
| 1972coldest | 61° | 42° | 51° | 0.12" | — |
| 1971 | 91° | — | — | — | — |
Saint Louis, MO Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
Saint Louis, MO Monthly Precipitation
Average rainfall and snowfall per month, in inches.
Saint Louis, MO Daily Temperature Calendar
Average daily high temperature for every day of the year. Each cell is the climatological mean for that calendar day across 55 years of NOAA data.
Best Time to Visit Saint Louis, MO
Most pleasant months in Saint Louis, MO: April, May, September, October.
What to expect on September 30th
This page shows what actually happened each year. For the odds — typical high and low, and how often it stays dry — see the climatological outlook for this date.
September 30th outlook →