Weather on May 9
Saint Louis, MO
55 Years of Data
Avg High
76°F
Avg Low
54°F
Warmest
2018
77°F avg
Coldest
2010
49°F avg
About This Date
May 9th in Saint Louis, MO typically brings pleasant spring weather, with average highs around 76°F and lows near 54°F. Over 53 years of records, the warmest May 9th was in 2018 (77°F average), while the coldest was 2010 (49°F) — a 28°F range across recorded history. Rain or other precipitation has occurred on about 36% of May 9th dates historically, with the wettest May 9th recording 2.13" of rain. The last decade has been 4.1°F cooler on this date compared to 20-30 years ago.
The last decade has been 4.1°F cooler on this date compared to 20-30 years ago.
Planning for May 9th in Saint Louis, MO? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Warming Trend
1.4°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 71° | 48° | 60° | — | — |
| 2024 | 78° | 60° | 69° | — | — |
| 2023 | 76° | 59° | 67° | — | — |
| 2022 | 85° | 62° | 73° | — | — |
| 2021 | 64° | 41° | 53° | 0.38" | — |
| 2020 | 65° | 34° | 49° | — | — |
| 2019 | 69° | 51° | 60° | 0.38" | — |
| 2018warmest | 87° | 67° | 77° | 0.15" | — |
| 2017 | 84° | 63° | 73° | — | — |
| 2016 | 77° | 66° | 72° | — | — |
| 2015 | 76° | 65° | 70° | 0.48" | — |
| 2014 | 86° | 67° | 76° | 0.05" | — |
| 2013 | 83° | 65° | 74° | — | — |
| 2012 | 74° | 53° | 63° | — | — |
| 2011 | 83° | 67° | 75° | — | — |
| 2010coldest | 60° | 38° | 49° | — | — |
| 2009 | 72° | 58° | 65° | 1.78" | — |
| 2008 | 60° | 50° | 55° | 0.23" | — |
| 2007 | 85° | 65° | 75° | 0.41" | — |
| 2006 | 71° | 53° | 62° | 0.1" | — |
| 2005 | 83° | 65° | 74° | — | — |
| 2004 | 86° | 65° | 75° | — | — |
| 2003 | 82° | 55° | 69° | 0.25" | — |
| 2002 | 82° | 62° | 72° | 2.13" | — |
| 2001 | 76° | 50° | 63° | — | — |
| 2000 | 84° | 64° | 74° | — | — |
| 1999 | 76° | 51° | 63° | — | — |
| 1998 | 72° | 58° | 65° | — | — |
| 1997 | 78° | 50° | 64° | — | — |
| 1996 | 88° | 63° | 75° | — | — |
| 1995 | 79° | 57° | 68° | 0.91" | — |
| 1994 | 73° | 49° | 61° | — | — |
| 1993 | 84° | 66° | 75° | — | — |
| 1992 | 83° | 46° | 64° | — | — |
| 1991 | 69° | 63° | 66° | — | — |
| 1990 | 75° | 45° | 60° | — | — |
| 1989 | 66° | 37° | 52° | 1.4" | — |
| 1988 | 77° | 45° | 61° | 1.6" | — |
| 1987 | 82° | 54° | 68° | — | — |
| 1986 | 87° | 61° | 74° | 1.14" | — |
| 1985 | 82° | 54° | 68° | — | — |
| 1984 | 82° | 57° | 70° | — | — |
| 1981 | 66° | 42° | 54° | — | — |
| 1980 | 71° | 36° | 53° | — | — |
| 1979 | 78° | 54° | 66° | — | — |
| 1978 | — | 52° | — | — | — |
| 1977 | 76° | 44° | 60° | — | — |
| 1976 | 66° | 37° | 52° | — | — |
| 1975 | 75° | 58° | 66° | 0.03" | — |
| 1974 | 73° | 48° | 61° | 0.05" | — |
| 1973 | 67° | 53° | 60° | 0.03" | — |
| 1972 | 64° | 46° | 55° | 0.03" | — |
| 1971 | 71° | 45° | 58° | — | — |
53 years of data from ST LOUIS ST LOUIS UNIV