Weather on April 21
Saint Louis, MO
55 Years of Data
About This Date
April 21st in Saint Louis, MO typically brings pleasant spring weather, with average highs around 70°F and lows near 47°F. Over 56 years of records, the warmest April 21st was in 1985 (75°F average), while the coldest was 2021 (42°F) — a 33°F range across recorded history. Rain or other precipitation has occurred on about 43% of April 21st dates historically, with the wettest April 21st recording 1.3" of rain. The last decade has been 3.9°F cooler on this date compared to 20-30 years ago.
The last decade has been 3.9°F cooler on this date compared to 20-30 years ago.
Planning for April 21st in Saint Louis, MO? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026 | 83° | 49° | 66° | — | — |
| 2025 | 68° | 50° | 59° | — | — |
| 2024 | 61° | 37° | 49° | — | — |
| 2023 | 67° | 48° | 57° | — | — |
| 2022 | 76° | 53° | 64° | 0.03" | — |
| 2021coldest | 52° | 31° | 42° | — | — |
| 2020 | 66° | 40° | 53° | — | — |
| 2019 | 80° | 38° | 59° | — | — |
| 2018 | 69° | 36° | 52° | — | — |
| 2017 | 83° | 49° | 66° | 0.03" | — |
| 2016 | 69° | 58° | 63° | 0.79" | — |
| 2015 | 59° | 45° | 52° | — | — |
| 2014 | 81° | 63° | 72° | 0.1" | — |
| 2013 | 56° | 42° | 49° | — | — |
| 2012 | 57° | 42° | 50° | 0.15" | — |
| 2011 | 56° | 41° | 48° | — | — |
| 2010 | 69° | 41° | 55° | — | — |
| 2009 | 65° | 41° | 53° | — | — |
| 2008 | 71° | 50° | 61° | — | — |
| 2007 | 70° | 44° | 57° | — | — |
| 2006 | 76° | 52° | 64° | — | — |
| 2005 | 82° | 58° | 70° | 0.61" | — |
| 2004 | 81° | 56° | 68° | 0.38" | — |
| 2003 | 66° | 51° | 59° | — | — |
| 2002 | 60° | 51° | 56° | 0.33" | — |
| 2001 | 72° | 64° | 68° | 0.05" | — |
| 2000 | 75° | 42° | 59° | — | — |
| 1999 | 72° | 53° | 62° | 1.04" | — |
| 1998 | 69° | 48° | 59° | — | — |
| 1997 | 60° | 49° | 54° | 1.14" | — |
| 1996 | 72° | 42° | 57° | — | — |
| 1995 | 67° | 48° | 57° | — | — |
| 1994 | 68° | 50° | 59° | 0.28" | — |
| 1993 | 57° | 37° | 47° | 0.1" | — |
| 1992 | 69° | 42° | 56° | 0.03" | — |
| 1991 | 58° | 36° | 47° | — | — |
| 1990 | 73° | 45° | 59° | 0.94" | — |
| 1989 | 80° | 45° | 62° | — | — |
| 1988 | 74° | 45° | 59° | — | — |
| 1987 | 86° | 54° | 70° | — | — |
| 1986 | 57° | 34° | 45° | 0.28" | — |
| 1985warmest | 85° | 66° | 75° | — | — |
| 1984 | 60° | 48° | 54° | 1.27" | — |
| 1983 | 58° | 37° | 47° | — | — |
| 1982 | 63° | 34° | 48° | — | — |
| 1981 | 55° | 42° | 49° | — | — |
| 1980 | 85° | 56° | 70° | — | — |
| 1979 | 83° | 56° | 69° | 0.15" | — |
| 1978 | 46° | 39° | 43° | — | — |
| 1977 | 79° | 59° | 69° | 0.86" | — |
| 1976 | 76° | 54° | 65° | 0.51" | — |
| 1975 | 65° | 37° | 51° | — | — |
| 1974 | 82° | 58° | 70° | 1.27" | — |
| 1973 | 80° | 65° | 72° | 0.13" | — |
| 1972 | 69° | 54° | 61° | 1.17" | — |
| 1971 | 87° | 52° | 69° | 1.3" | — |
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
Saint Louis, MO has no months that meet our "pleasant" threshold — every season has tradeoffs.