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St. Louis, MO Weather on April 9
St. Louis hit 87°F on April 9, 2001, shattering spring expectations
April 9, 2001 marked an exceptional spring day in St. Louis when temperatures soared to 87°F, far exceeding the 65°F average for this date. Over 55 years of records, this remains the warmest April 9 ever recorded in the city. The contrast is stark: just six years later in 2007, St. Louis experienced a hard freeze on this same date, dropping to 23°F and showing the dramatic swings possible in early spring weather.
What to Expect on April 9
Planning for April 9th in St. Louis, MO? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Frequently Asked Questions
What was the warmest April 9 ever in St. Louis?
The warmest April 9 in St. Louis, MO reached 87°F in 2001. That is 22°F above the long-term average high of 65°F.
What was the coldest April 9 ever in St. Louis?
The coldest April 9 in St. Louis, MO dropped to 23°F in 2007. That is 19°F below the long-term average low of 42°F.
What is the average temperature on April 9 in St. Louis?
On April 9, St. Louis averages a high of 65°F and a low of 42°F based on 55 years of NOAA weather observations from ST LOUIS ST LOUIS UNIV.
How many years of weather data are available for April 9 in St. Louis?
We have 55 years of weather records for April 9 in St. Louis, MO, sourced from NOAA's Global Historical Climatology Network. Records include daily high and low temperatures, precipitation, and snowfall data going back to 2025.
April 9 Weather History in St. Louis
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 70°F | 40°F | 0" | -- |
| 2024 | 74°F | 50°F | 0" | -- |
| 2023 | 70°F | 35°F | 0" | -- |
| 2022 | 59°F | 35°F | 0" | -- |
| 2021 | 81°F | 44°F | 0" | -- |
| 2020 | 62°F | 39°F | 0" | -- |
| 2019 | 73°F | 49°F | 0" | -- |
| 2018 | 42°F | 36°F | 0" | -- |
| 2017 | 82°F | 57°F | 0" | -- |
| 2016 | 54°F | 31°F | 0" | -- |
| 2015 | 83°F | 56°F | 0.81" | -- |
| 2014 | 62°F | 41°F | 0" | -- |
| 2013 | 78°F | 60°F | 0" | -- |
| 2012 | 67°F | 40°F | 0" | -- |
| 2011 | 79°F | 59°F | 0.97" | -- |
| 2010 | 61°F | 35°F | 0" | -- |
| 2009 | 62°F | 31°F | 0" | -- |
| 2008 | 70°F | 41°F | 0.08" | -- |
| 2007 | 49°F | 23°F | 0" | -- |
| 2006 | 52°F | 31°F | 0" | -- |
| 2005 | 72°F | 44°F | 0" | -- |
| 2004 | 65°F | 37°F | 0" | -- |
| 2003 | 43°F | 34°F | 0.03" | -- |
| 2002 | 70°F | 51°F | 0.33" | -- |
| 2001 | 87°F | 67°F | 0" | -- |
| 2000 | 51°F | 32°F | 0" | -- |
| 1999 | 80°F | 57°F | 1.3" | -- |
| 1998 | 72°F | 44°F | 0" | -- |
| 1997 | 49°F | 25°F | 0" | -- |
| 1996 | 55°F | 26°F | 0" | -- |
| 1995 | 81°F | 51°F | 0" | -- |
| 1994 | 67°F | 57°F | 0" | -- |
| 1993 | 64°F | 51°F | 0.51" | -- |
| 1992 | 78°F | 56°F | 0.2" | -- |
| 1991 | 76°F | 42°F | 0.03" | -- |
| 1990 | 67°F | 42°F | 0" | -- |
| 1989 | 52°F | 28°F | 0" | -- |
| 1988 | 73°F | 49°F | 0" | -- |
| 1987 | 75°F | 39°F | 0" | -- |
| 1986 | 62°F | 36°F | 0" | -- |
| 1985 | 54°F | 41°F | 0" | -- |
| 1984 | 54°F | 49°F | 0.03" | -- |
| 1983 | 53°F | 41°F | 2.59" | -- |
| 1982 | 37°F | 32°F | 2.31" | -- |
| 1981 | 78°F | 51°F | 1.02" | -- |
| 1980 | 53°F | 43°F | 0" | -- |
| 1979 | 70°F | 37°F | 0.43" | -- |
| 1978 | 81°F | 55°F | 0" | -- |
| 1977 | 63°F | 38°F | 0" | -- |
| 1976 | 62°F | 32°F | 0" | -- |
| 1975 | 65°F | 44°F | 0.18" | -- |
| 1974 | 48°F | 27°F | 0.05" | -- |
| 1973 | 51°F | 33°F | 2.34" | -- |
| 1972 | 52°F | 33°F | 0" | -- |
| 1971 | 77°F | 53°F | 0" | -- |
Based on 55 years of data from NOAA station: ST LOUIS ST LOUIS UNIV
How Has April 9 Changed?
The last decade has been 1.0°F warmer on this date compared to 20-30 years ago.
Monthly Climate Averages
Historical temperature and precipitation averages for St. Louis, MO, based on 55+ years of weather data.
Temperatures in Fahrenheit. Precipitation and snowfall in inches.