Weather on August 21
Davenport, IA
55 Years of Data
Avg High
83°F
Avg Low
65°F
Warmest
2003
85°F avg
Coldest
2004
65°F avg
About This Date
August 21st in Davenport, IA typically brings warm summer weather, with average highs around 83°F and lows near 65°F. Over 55 years of records, the warmest August 21st was in 2003 (85°F average), while the coldest was 2004 (65°F) — a 20°F range across recorded history. Rain or other precipitation has occurred on about 29% of August 21st dates historically, with the wettest August 21st recording 9.02" of rain. The last decade has been 2.0°F cooler on this date compared to 20-30 years ago.
The last decade has been 2.0°F cooler on this date compared to 20-30 years ago.
Planning for August 21st in Davenport, IA? 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 | 82° | 68° | 75° | — | — |
| 2024 | 77° | 58° | 67° | — | — |
| 2023 | 88° | 69° | 78° | — | — |
| 2022 | 77° | 65° | 71° | — | — |
| 2021 | 85° | 70° | 77° | 0.3" | — |
| 2020 | 88° | 64° | 76° | — | — |
| 2019 | 83° | 68° | 75° | 0.28" | — |
| 2018 | 77° | 60° | 69° | 0.05" | — |
| 2017 | 81° | 68° | 74° | 0.23" | — |
| 2016 | 76° | 59° | 67° | — | — |
| 2015 | 83° | 62° | 72° | — | — |
| 2014 | 81° | 71° | 76° | 0.03" | — |
| 2013 | 89° | 72° | 80° | — | — |
| 2012 | 80° | 56° | 68° | — | — |
| 2011 | 82° | 67° | 74° | — | — |
| 2010 | 86° | 69° | 78° | 0.3" | — |
| 2009 | 74° | 59° | 66° | — | — |
| 2008 | 85° | 64° | 74° | — | — |
| 2007 | 89° | 72° | 80° | 0.89" | — |
| 2006 | 83° | 64° | 73° | — | — |
| 2005 | 85° | 68° | 76° | — | — |
| 2004coldest | 75° | 55° | 65° | 0.03" | — |
| 2003warmest | 94° | 76° | 85° | 0.69" | — |
| 2002 | 90° | 66° | 78° | — | — |
| 2001 | 82° | 66° | 74° | — | — |
| 2000 | 83° | 62° | 72° | — | — |
| 1999 | 80° | 60° | 70° | — | — |
| 1998 | 89° | 72° | 80° | — | — |
| 1997 | 77° | 57° | 67° | 0.03" | — |
| 1996 | 91° | 73° | 82° | — | — |
| 1995 | 86° | 67° | 76° | — | — |
| 1994 | 78° | 59° | 69° | — | — |
| 1993 | 81° | 66° | 73° | — | — |
| 1992 | 80° | 56° | 68° | — | — |
| 1991 | 87° | 64° | 76° | — | — |
| 1990 | 71° | 66° | 69° | 0.46" | — |
| 1989 | 86° | 66° | 76° | — | — |
| 1988 | 85° | 67° | 76° | — | — |
| 1987 | 93° | 64° | 79° | 9.02" | — |
| 1986 | 80° | 68° | 74° | — | — |
| 1985 | 78° | 57° | 68° | — | — |
| 1984 | 85° | 61° | 73° | 0.36" | — |
| 1983 | 95° | 74° | 84° | — | — |
| 1982 | 83° | 61° | 72° | — | — |
| 1981 | 80° | 59° | 70° | — | — |
| 1980 | 84° | 68° | 76° | 1.83" | — |
| 1979 | 83° | 64° | 73° | — | — |
| 1978 | 86° | 58° | 72° | — | — |
| 1977 | 78° | 63° | 70° | — | — |
| 1976 | 90° | 65° | 77° | — | — |
| 1975 | 93° | 72° | 82° | 0.76" | — |
| 1974 | 90° | 67° | 78° | 0.69" | — |
| 1973 | 78° | 60° | 69° | — | — |
| 1972 | 90° | 72° | 81° | — | — |
| 1971 | 80° | 67° | 73° | — | — |
55 years of data from DAVENPORT L&D 15