Weather on August 21
Kansas City, MO
55 Years of Data
Avg High
89°F
Avg Low
70°F
Warmest
2003
95°F avg
Coldest
2004
65°F avg
About This Date
August 21st in Kansas City, MO typically brings warm summer weather, with average highs around 89°F and lows near 70°F. Over 54 years of records, the warmest August 21st was in 2003 (95°F average), while the coldest was 2004 (65°F) — a 30°F range across recorded history. Rain or other precipitation has occurred on about 20% of August 21st dates historically, with the wettest August 21st recording 6.12" of rain. The last decade has been 4.0°F cooler on this date compared to 20-30 years ago.
The last decade has been 4.0°F cooler on this date compared to 20-30 years ago.
Planning for August 21st in Kansas City, MO? 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 | 86° | 71° | 79° | — | — |
| 2024 | 83° | 67° | 75° | — | — |
| 2023 | 98° | 80° | 89° | — | — |
| 2022 | 85° | 64° | 74° | — | — |
| 2021 | 84° | 69° | 77° | 0.33" | — |
| 2020 | 91° | 67° | 79° | — | — |
| 2019 | 84° | 74° | 79° | 0.36" | — |
| 2018 | 83° | 66° | 74° | — | — |
| 2017 | 82° | 70° | 76° | 6.12" | — |
| 2016 | 83° | 58° | 70° | — | — |
| 2015 | 85° | 64° | 74° | — | — |
| 2014 | 97° | 79° | 88° | — | — |
| 2013 | 93° | 71° | 82° | — | — |
| 2012 | 97° | 64° | 80° | — | — |
| 2011 | 89° | 69° | 79° | 0.03" | — |
| 2010 | 93° | 69° | 81° | — | — |
| 2009 | 78° | 62° | 70° | — | — |
| 2008 | 82° | 66° | 74° | 0.25" | — |
| 2007 | 95° | 80° | 88° | — | — |
| 2006 | 88° | 70° | 79° | — | — |
| 2005 | 85° | 70° | 77° | — | — |
| 2004coldest | 74° | 57° | 65° | — | — |
| 2003warmest | 105° | 84° | 95° | — | — |
| 2002 | 94° | 79° | 86° | — | — |
| 2001 | 100° | 77° | 89° | — | — |
| 2000 | 98° | 75° | 87° | — | — |
| 1999 | 87° | 68° | 78° | — | — |
| 1998 | 94° | 73° | 83° | — | — |
| 1997 | 82° | 63° | 72° | — | — |
| 1996 | 89° | 72° | 80° | — | — |
| 1995 | 89° | 70° | 79° | — | — |
| 1994 | 79° | 57° | 68° | — | — |
| 1993 | 78° | 70° | 74° | 0.13" | — |
| 1992 | 82° | 62° | 72° | — | — |
| 1991 | 95° | 65° | 80° | — | — |
| 1990 | 85° | 68° | 76° | — | — |
| 1989 | 84° | 72° | 78° | 1.98" | — |
| 1988 | 97° | 74° | 85° | — | — |
| 1987 | 96° | 80° | 88° | — | — |
| 1986 | 86° | 70° | 78° | — | — |
| 1985 | 83° | 66° | 74° | 0.28" | — |
| 1984 | 87° | 77° | 82° | 0.58" | — |
| 1983 | 100° | 79° | 89° | — | — |
| 1982 | 86° | 65° | 75° | — | — |
| 1981 | 86° | 62° | 74° | — | — |
| 1980 | 89° | 68° | 79° | — | — |
| 1979 | 92° | 73° | 82° | 0.3" | — |
| 1978 | 84° | 60° | 72° | — | — |
| 1977 | 85° | 67° | 76° | — | — |
| 1976 | 89° | 67° | 78° | — | — |
| 1975 | 93° | 74° | 83° | — | — |
| 1974 | 91° | 71° | 81° | — | — |
| 1972 | 96° | 76° | 86° | 0.05" | — |
| 1971 | 92° | 74° | 83° | — | — |
54 years of data from KANSAS CITY DWTN AP