Weather on September 21
Cedar Rapids, IA
55 Years of Data
About This Date
September 21st in Cedar Rapids, IA typically brings pleasant fall weather, with average highs around 74°F and lows near 52°F. Over 56 years of records, the warmest September 21st was in 2017 (81°F average), while the coldest was 1983 (45°F) — a 36°F range across recorded history. Rain or other precipitation has occurred on about 29% of September 21st dates historically, with the wettest September 21st recording 0.76" of rain. The last decade has been 10.2°F warmer on this date compared to 20-30 years ago.
The last decade has been 10.2°F warmer on this date compared to 20-30 years ago.
Planning for September 21st in Cedar Rapids, IA? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026 | 68° | 56° | 62° | 0.07" | — |
| 2025 | 78° | 59° | 69° | — | — |
| 2024 | 88° | 59° | 73° | — | — |
| 2023 | 78° | 55° | 67° | — | — |
| 2022 | 94° | 68° | 81° | — | — |
| 2021 | 81° | 55° | 68° | 0.32" | — |
| 2020 | 77° | 46° | 62° | — | — |
| 2019 | 85° | 70° | 77° | 0.18" | — |
| 2018 | 89° | 59° | 74° | 0.12" | — |
| 2017warmest | 94° | 68° | 81° | — | — |
| 2016 | 87° | 68° | 78° | — | — |
| 2015 | 75° | 47° | 61° | — | — |
| 2014 | 77° | 54° | 65° | — | — |
| 2013 | 69° | 47° | 58° | — | — |
| 2012 | 67° | 44° | 55° | 0.02" | — |
| 2011 | 77° | 52° | 64° | — | — |
| 2010 | 83° | 64° | 73° | 0.76" | — |
| 2009 | 74° | 52° | 63° | 0.13" | — |
| 2008 | 82° | 53° | 68° | — | — |
| 2007 | 87° | 67° | 77° | — | — |
| 2006 | 67° | 47° | 57° | — | — |
| 2005 | 91° | 60° | 76° | — | — |
| 2004 | 84° | 58° | 71° | — | — |
| 2003 | 69° | 59° | 64° | 0.2" | — |
| 2002 | 71° | 53° | 62° | — | — |
| 2001 | 69° | 55° | 62° | 0.03" | — |
| 2000 | 64° | 39° | 52° | — | — |
| 1999 | 64° | 35° | 50° | — | — |
| 1998 | 77° | 51° | 64° | — | — |
| 1997 | 65° | 41° | 53° | — | — |
| 1996 | 71° | 58° | 64° | — | — |
| 1995 | 52° | 42° | 47° | 0.04" | — |
| 1994 | 83° | 58° | 70° | — | — |
| 1993 | 69° | 55° | 62° | — | — |
| 1992 | 62° | 55° | 59° | 0.18" | — |
| 1991 | 67° | 34° | 50° | — | — |
| 1990 | 69° | 60° | 65° | 0.14" | — |
| 1989 | 78° | 52° | 65° | — | — |
| 1988 | 70° | 43° | 56° | 0.06" | — |
| 1987 | 65° | 47° | 56° | 0.11" | — |
| 1986 | 86° | 62° | 74° | — | — |
| 1985 | 61° | 49° | 55° | 0.43" | — |
| 1984 | 85° | 54° | 69° | — | — |
| 1983coldest | 53° | 37° | 45° | — | — |
| 1982 | 61° | 36° | 48° | — | — |
| 1981 | 73° | 55° | 64° | — | — |
| 1980 | 84° | 61° | 72° | — | — |
| 1979 | 78° | 46° | 62° | — | — |
| 1978 | 65° | 50° | 57° | — | — |
| 1977 | 73° | 50° | 62° | — | — |
| 1976 | 66° | 46° | 56° | — | — |
| 1975 | 55° | 48° | 52° | — | — |
| 1974 | 63° | 42° | 52° | — | — |
| 1973 | 71° | 49° | 60° | 0.01" | — |
| 1972 | 74° | 52° | 63° | — | — |
| 1971 | 73° | 45° | 59° | — | — |
Cedar Rapids, IA Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
Cedar Rapids, IA Monthly Precipitation
Average rainfall and snowfall per month, in inches.
Cedar Rapids, IA 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 Cedar Rapids, IA
Most pleasant months in Cedar Rapids, IA: May, June, September.