Weather on August 21
Cedar Rapids, IA
55 Years of Data
About This Date
August 21st in Cedar Rapids, IA typically brings warm summer weather, with average highs around 83°F and lows near 61°F. Over 55 years of records, the warmest August 21st was in 1983 (84°F average), while the coldest was 2004 (59°F) — a 25°F range across recorded history. Rain or other precipitation has occurred on about 35% of August 21st dates historically, with the wettest August 21st recording 5.99" of rain. Temperatures on this date have remained relatively stable over the past several decades.
Temperatures on this date have remained relatively stable over the past several decades.
Planning for August 21st in Cedar Rapids, IA? Stay hydrated and seek shade during peak afternoon hours. Consider bringing rain gear or an umbrella.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 85° | 60° | 72° | — | — |
| 2024 | 76° | 55° | 65° | — | — |
| 2023 | 93° | 72° | 82° | — | — |
| 2022 | 79° | 60° | 69° | — | — |
| 2021 | 87° | 69° | 78° | 1.3" | — |
| 2020 | 87° | 57° | 72° | — | — |
| 2019 | 83° | 65° | 74° | — | — |
| 2018 | 73° | 61° | 67° | 1.07" | — |
| 2017 | 80° | 65° | 72° | 0.69" | — |
| 2016 | 78° | 54° | 66° | — | — |
| 2015 | 80° | 56° | 68° | — | — |
| 2014 | 79° | 68° | 73° | 0.36" | — |
| 2013 | 90° | 69° | 79° | — | — |
| 2012 | 81° | 46° | 63° | — | — |
| 2011 | 83° | 61° | 72° | — | — |
| 2010 | 87° | 71° | 79° | — | — |
| 2009 | 72° | 59° | 65° | 0.61" | — |
| 2008 | 82° | 65° | 73° | 1.17" | — |
| 2007 | 90° | 69° | 79° | 1.5" | — |
| 2006 | 80° | 58° | 69° | — | — |
| 2005 | 80° | 59° | 70° | — | — |
| 2004coldest | 74° | 45° | 59° | — | — |
| 2003 | 93° | 73° | 83° | — | — |
| 2002 | 89° | 66° | 78° | — | — |
| 2001 | 78° | 60° | 69° | — | — |
| 2000 | 79° | 59° | 69° | — | — |
| 1999 | 78° | 59° | 69° | 0.03" | — |
| 1998 | 87° | 68° | 78° | — | — |
| 1997 | 75° | 53° | 64° | 0.1" | — |
| 1996 | 89° | 68° | 79° | — | — |
| 1995 | 89° | 58° | 73° | — | — |
| 1994 | 76° | 54° | 65° | — | — |
| 1993 | 78° | 58° | 68° | — | — |
| 1992 | 80° | 52° | 66° | — | — |
| 1991 | 86° | 61° | 73° | 0.23" | — |
| 1990 | 69° | 62° | 66° | 1.02" | — |
| 1989 | 86° | 61° | 73° | — | — |
| 1988 | 84° | 62° | 73° | — | — |
| 1987 | 93° | 64° | 79° | 5.99" | — |
| 1986 | 77° | 63° | 70° | — | — |
| 1985 | 81° | 53° | 67° | — | — |
| 1984 | 78° | 59° | 69° | 0.08" | — |
| 1983warmest | 94° | 74° | 84° | 0.05" | — |
| 1982 | 82° | 55° | 69° | — | — |
| 1981 | 77° | 53° | 65° | — | — |
| 1980 | 87° | 64° | 76° | 0.13" | — |
| 1979 | 82° | 65° | 73° | 0.03" | — |
| 1978 | 73° | 56° | 64° | 0.81" | — |
| 1977 | 77° | 58° | 67° | 0.61" | — |
| 1976 | 88° | 60° | 74° | — | — |
| 1975 | 94° | 70° | 82° | — | — |
| 1974 | 87° | 70° | 78° | — | — |
| 1973 | 80° | 53° | 67° | 0.41" | — |
| 1972 | 88° | 73° | 80° | — | — |
| 1971 | 85° | 63° | 74° | — | — |