Weather on March 31
Saint Louis, MO
55 Years of Data
Avg High
62°F
Avg Low
41°F
Warmest
2026
74°F avg
Coldest
1975
35°F avg
About This Date
March 31st in Saint Louis, MO typically brings mild spring weather, with average highs around 62°F and lows near 41°F. Over 55 years of records, the warmest March 31st was in 2026 (74°F average), while the coldest was 1975 (35°F) — a 39°F range across recorded history. Rain or other precipitation has occurred on about 36% of March 31st dates historically, with the wettest March 31st recording 2.95" of rain. The last decade has been 3.8°F warmer on this date compared to 20-30 years ago.
The last decade has been 3.8°F warmer on this date compared to 20-30 years ago.
Planning for March 31st in Saint Louis, MO? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Warming Trend
1.9°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026warmest | 84° | 65° | 74° | — | — |
| 2025 | 55° | 40° | 47° | — | — |
| 2024 | 82° | 55° | 69° | — | — |
| 2023 | 75° | 54° | 64° | 2.74" | — |
| 2022 | 42° | 38° | 40° | — | — |
| 2021 | 55° | 38° | 46° | — | — |
| 2020 | 62° | 40° | 51° | — | — |
| 2019 | 45° | 31° | 38° | — | — |
| 2018 | 58° | — | — | — | — |
| 2017 | 70° | 45° | 57° | 0.89" | — |
| 2016 | 68° | 57° | 63° | 1.78" | — |
| 2015 | 71° | 51° | 61° | — | — |
| 2014 | 64° | 46° | 55° | — | — |
| 2013 | 64° | 47° | 55° | 0.25" | — |
| 2012 | 82° | 49° | 65° | — | — |
| 2011 | 51° | 33° | 42° | — | — |
| 2010 | 72° | 41° | 56° | — | — |
| 2009 | 66° | 36° | 51° | 0.2" | — |
| 2008 | 62° | 47° | 54° | 0.03" | — |
| 2007 | 67° | 59° | 63° | 0.71" | — |
| 2006 | 77° | 45° | 61° | 0.08" | — |
| 2005 | 79° | 46° | 62° | 0.05" | — |
| 2004 | 53° | 36° | 44° | 0.05" | — |
| 2003 | 51° | 33° | 42° | — | — |
| 2002 | 62° | 42° | 52° | — | — |
| 2001 | 54° | 32° | 43° | — | — |
| 2000 | 60° | 33° | 47° | — | — |
| 1999 | 71° | 42° | 57° | — | — |
| 1998 | 78° | 57° | 68° | 1.4" | — |
| 1997 | 57° | 37° | 47° | — | — |
| 1996 | 58° | 41° | 49° | 2.95" | — |
| 1995 | 49° | 29° | 39° | — | — |
| 1994 | 57° | 24° | 41° | — | — |
| 1993 | 72° | 51° | 61° | 1.22" | — |
| 1992 | 63° | 31° | 47° | — | — |
| 1991 | 66° | 33° | 50° | — | — |
| 1990 | 60° | 46° | 53° | — | — |
| 1989 | 50° | 28° | 39° | 0.86" | — |
| 1988 | 55° | 45° | 50° | — | — |
| 1987 | 48° | 29° | 38° | — | — |
| 1986 | 84° | 56° | 70° | — | — |
| 1985 | 50° | 38° | 44° | 1.83" | — |
| 1984 | 55° | 28° | 42° | — | — |
| 1983 | 47° | 40° | 43° | 0.05" | — |
| 1982 | 68° | 46° | 57° | 0.76" | — |
| 1980 | 51° | 39° | 45° | 0.51" | — |
| 1979 | 70° | 43° | 56° | 0.53" | — |
| 1978 | 66° | 43° | 54° | — | — |
| 1977 | 71° | 38° | 54° | — | — |
| 1976 | 57° | 31° | 44° | — | — |
| 1975coldest | 45° | 26° | 35° | — | — |
| 1974 | 64° | 40° | 52° | — | — |
| 1973 | 66° | 41° | 54° | 1.57" | — |
| 1972 | 49° | 30° | 39° | — | — |
| 1971 | 71° | — | — | — | — |
55 years of data from ST LOUIS ST LOUIS UNIV