Weather on September 21
Kansas City, MO
55 Years of Data
About This Date
September 21st in Kansas City, MO typically brings pleasant fall weather, with average highs around 77°F and lows near 58°F. Over 55 years of records, the warmest September 21st was in 2017 (86°F average), while the coldest was 1995 (47°F) — a 39°F range across recorded history. Rain or other precipitation has occurred on about 27% of September 21st dates historically, with the wettest September 21st recording 3.4" of rain. The last decade has been 8.6°F warmer on this date compared to 20-30 years ago.
The last decade has been 8.6°F warmer on this date compared to 20-30 years ago.
Planning for September 21st in Kansas City, MO? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 82° | 67° | 74° | 0.3" | — |
| 2024 | 91° | 71° | 81° | — | — |
| 2023 | 85° | 63° | 74° | 0.03" | — |
| 2022 | 86° | 60° | 73° | — | — |
| 2021 | 75° | 58° | 66° | — | — |
| 2020 | 79° | 58° | 68° | — | — |
| 2019 | 80° | 73° | 77° | 1.63" | — |
| 2018 | 76° | 60° | 68° | 0.71" | — |
| 2017warmest | 93° | 78° | 86° | — | — |
| 2016 | 92° | 76° | 84° | — | — |
| 2015 | 76° | 61° | 68° | — | — |
| 2014 | 78° | 57° | 68° | — | — |
| 2013 | 75° | 51° | 63° | — | — |
| 2012 | 82° | 57° | 70° | — | — |
| 2011 | 73° | 55° | 64° | — | — |
| 2010 | 92° | 56° | 74° | 3.4" | — |
| 2009 | 70° | 59° | 64° | 2.54" | — |
| 2008 | 79° | 60° | 69° | — | — |
| 2007 | 89° | 70° | 79° | 0.99" | — |
| 2006 | 66° | 59° | 63° | 2.34" | — |
| 2005 | 90° | 67° | 78° | — | — |
| 2004 | 83° | 65° | 74° | — | — |
| 2003 | 75° | 61° | 68° | 0.71" | — |
| 2002 | 86° | 59° | 73° | — | — |
| 2001 | 79° | 60° | 69° | — | — |
| 2000 | 72° | 51° | 61° | — | — |
| 1999 | 65° | 42° | 53° | 0.03" | — |
| 1998 | 69° | 57° | 63° | 0.51" | — |
| 1997 | 72° | 54° | 63° | — | — |
| 1996 | 75° | 52° | 63° | — | — |
| 1995coldest | 51° | 42° | 47° | 1.04" | — |
| 1994 | 70° | 62° | 66° | — | — |
| 1993 | 79° | 57° | 68° | — | — |
| 1992 | 72° | 63° | 67° | — | — |
| 1991 | 65° | 54° | 59° | — | — |
| 1990 | 76° | 60° | 68° | — | — |
| 1989 | 80° | 57° | 69° | — | — |
| 1988 | 90° | 60° | 75° | — | — |
| 1987 | 73° | 51° | 62° | — | — |
| 1986 | 89° | 72° | 80° | — | — |
| 1985 | 65° | 53° | 59° | 1.93" | — |
| 1984 | 81° | 60° | 70° | — | — |
| 1983 | 65° | 40° | 52° | — | — |
| 1982 | 65° | 44° | 54° | — | — |
| 1981 | 87° | 67° | 77° | — | — |
| 1980 | 97° | 70° | 83° | — | — |
| 1979 | 74° | 54° | 64° | — | — |
| 1978 | 70° | 54° | 62° | 0.43" | — |
| 1977 | 76° | 61° | 68° | 0.3" | — |
| 1976 | 75° | 50° | 63° | — | — |
| 1975 | 67° | 45° | 56° | — | — |
| 1974 | 74° | 51° | 62° | — | — |
| 1973 | 72° | 62° | 67° | — | — |
| 1972 | 74° | 57° | 65° | — | — |
| 1971 | 75° | 50° | 63° | — | — |
Kansas City, MO Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
Kansas City, MO Monthly Precipitation
Average rainfall and snowfall per month, in inches.
Kansas City, 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 Kansas City, MO
Kansas City, MO has no months that meet our "pleasant" threshold — every season has tradeoffs.