Weather on August 21
Shawnee Mission, KS
55 Years of Data
Avg High
88°F
Avg Low
66°F
Warmest
2023
91°F avg
Coldest
2004
63°F avg
About This Date
August 21st in Shawnee Mission, KS typically brings warm summer weather, with average highs around 88°F and lows near 66°F. Over 55 years of records, the warmest August 21st was in 2023 (91°F average), while the coldest was 2004 (63°F) — a 28°F range across recorded history. Rain or other precipitation has occurred on about 18% of August 21st dates historically, with the wettest August 21st recording 9.42" of rain. The last decade has been 1.8°F cooler on this date compared to 20-30 years ago.
The last decade has been 1.8°F cooler on this date compared to 20-30 years ago.
Planning for August 21st in Shawnee Mission, KS? Stay hydrated and seek shade during peak afternoon hours.
Cooling Trend
0.3°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 85° | 68° | 76° | — | — |
| 2024 | 82° | 61° | 71° | — | — |
| 2023warmest | 101° | 81° | 91° | — | — |
| 2022 | 86° | 64° | 75° | — | — |
| 2021 | 84° | 69° | 77° | 0.79" | — |
| 2020 | 88° | 60° | 74° | — | — |
| 2019 | 84° | 71° | 78° | 0.18" | — |
| 2018 | 82° | 65° | 73° | — | — |
| 2017 | 87° | 68° | 78° | 9.42" | — |
| 2016 | 81° | 57° | 69° | — | — |
| 2015 | 81° | 57° | 69° | — | — |
| 2014 | 94° | 75° | 84° | — | — |
| 2013 | 88° | 65° | 76° | — | — |
| 2012 | 95° | 60° | 78° | — | — |
| 2011 | 89° | 67° | 78° | 0.03" | — |
| 2010 | 92° | 68° | 80° | — | — |
| 2009 | 78° | 60° | 69° | — | — |
| 2008 | 79° | 66° | 72° | 0.3" | — |
| 2007 | 91° | 73° | 82° | — | — |
| 2006 | 86° | 69° | 78° | — | — |
| 2005 | 84° | 69° | 77° | — | — |
| 2004coldest | 70° | 57° | 63° | — | — |
| 2003 | 101° | 77° | 89° | — | — |
| 2002 | 88° | 72° | 80° | — | — |
| 2001 | 99° | 74° | 86° | — | — |
| 2000 | 98° | 71° | 85° | — | — |
| 1999 | 86° | 62° | 74° | — | — |
| 1998 | 89° | 72° | 80° | — | — |
| 1997 | 80° | 57° | 69° | — | — |
| 1996 | 86° | 68° | 77° | 1.24" | — |
| 1995 | 88° | 65° | 76° | — | — |
| 1994 | 79° | 57° | 68° | — | — |
| 1993 | 81° | 69° | 75° | 0.56" | — |
| 1992 | 84° | 57° | 71° | — | — |
| 1991 | 95° | 63° | 79° | — | — |
| 1990 | 86° | 64° | 75° | — | — |
| 1989 | 85° | 69° | 77° | 1.02" | — |
| 1988 | 95° | 71° | 83° | — | — |
| 1987 | 93° | 66° | 80° | — | — |
| 1986 | 87° | 67° | 77° | — | — |
| 1985 | 81° | 61° | 71° | — | — |
| 1984 | 84° | 68° | 76° | — | — |
| 1983 | 99° | 72° | 85° | 0.08" | — |
| 1982 | 81° | 63° | 72° | — | — |
| 1981 | 80° | 54° | 67° | — | — |
| 1980 | 83° | 62° | 72° | — | — |
| 1979 | 87° | 65° | 76° | 0.1" | — |
| 1978 | 93° | 64° | 79° | — | — |
| 1977 | 84° | 67° | 75° | — | — |
| 1976 | 93° | 66° | 80° | — | — |
| 1975 | 94° | 74° | 84° | — | — |
| 1974 | 92° | 71° | 81° | — | — |
| 1973 | 88° | 67° | 77° | — | — |
| 1972 | 95° | 72° | 83° | — | — |
| 1971 | 92° | 70° | 81° | — | — |
55 years of data from LEAWOOD