Weather on August 15
Des Moines, IA
55 Years of Data
Avg High
83°F
Avg Low
61°F
Warmest
1988
89°F avg
Coldest
1979
57°F avg
About This Date
August 15th in Des Moines, 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 15th was in 1988 (89°F average), while the coldest was 1979 (57°F) — a 32°F range across recorded history. Rain or other precipitation has occurred on about 27% of August 15th dates historically, with the wettest August 15th recording 2.08" of rain. The last decade has been 3.2°F warmer on this date compared to 20-30 years ago.
The last decade has been 3.2°F warmer on this date compared to 20-30 years ago.
Planning for August 15th in Des Moines, IA? Stay hydrated and seek shade during peak afternoon hours.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 91° | 71° | 81° | — | — |
| 2024 | 87° | 71° | 79° | 0.25" | — |
| 2023 | 80° | 57° | 69° | — | — |
| 2022 | 70° | 64° | 67° | 1.4" | — |
| 2021 | 82° | 60° | 71° | — | — |
| 2020 | 88° | 61° | 74° | 0.91" | — |
| 2019 | 76° | 59° | 67° | — | — |
| 2018 | 87° | 69° | 78° | 0.53" | — |
| 2017 | 85° | 62° | 73° | — | — |
| 2016 | 82° | 61° | 71° | — | — |
| 2015 | 86° | 63° | 74° | — | — |
| 2014 | 81° | 55° | 68° | — | — |
| 2013 | 76° | 53° | 64° | 0.03" | — |
| 2012 | 90° | 60° | 75° | — | — |
| 2011 | 88° | 58° | 73° | — | — |
| 2010 | 89° | 64° | 77° | — | — |
| 2009 | 90° | 66° | 78° | — | — |
| 2008 | 84° | 60° | 72° | 0.05" | — |
| 2007 | 83° | 72° | 77° | 0.03" | — |
| 2006 | 81° | 59° | 70° | — | — |
| 2005 | 78° | 56° | 67° | — | — |
| 2004 | 76° | 46° | 61° | — | — |
| 2003 | 88° | 64° | 76° | — | — |
| 2002 | 84° | 57° | 71° | — | — |
| 2001 | 81° | 52° | 66° | 0.15" | — |
| 2000 | 93° | 71° | 82° | — | — |
| 1999 | 78° | 52° | 65° | — | — |
| 1998 | 86° | 62° | 74° | 1.27" | — |
| 1997 | 75° | 55° | 65° | 1.52" | — |
| 1996 | 86° | 55° | 71° | — | — |
| 1995 | 82° | 67° | 74° | 0.18" | — |
| 1994 | 70° | 46° | 58° | — | — |
| 1993 | 87° | 68° | 78° | 0.13" | — |
| 1992 | 70° | 47° | 58° | — | — |
| 1991 | 82° | 57° | 70° | — | — |
| 1990 | 80° | 60° | 70° | — | — |
| 1989 | 76° | 58° | 67° | — | — |
| 1988warmest | 102° | 76° | 89° | — | — |
| 1987 | 90° | 68° | 79° | 0.84" | — |
| 1986 | 88° | 67° | 77° | — | — |
| 1985 | 80° | 54° | 67° | — | — |
| 1984 | 93° | 63° | 78° | — | — |
| 1983 | 97° | 64° | 80° | — | — |
| 1982 | 75° | 66° | 71° | — | — |
| 1981 | 87° | 67° | 77° | 2.08" | — |
| 1980 | 76° | 57° | 66° | — | — |
| 1979coldest | 65° | 49° | 57° | — | — |
| 1978 | 92° | 66° | 79° | 0.48" | — |
| 1977 | 73° | 56° | 64° | — | — |
| 1976 | 76° | 59° | 67° | — | — |
| 1975 | 76° | 61° | 68° | — | — |
| 1974 | 85° | 65° | 75° | — | — |
| 1973 | 82° | 63° | 72° | — | — |
| 1972 | 93° | 68° | 81° | — | — |
| 1971 | 77° | 61° | 69° | — | — |
55 years of data from ANKENY