Weather on August 18
Des Moines, IA
55 Years of Data
Avg High
84°F
Avg Low
62°F
Warmest
1983
86°F avg
Coldest
2002
57°F avg
About This Date
August 18th in Des Moines, IA typically brings warm summer weather, with average highs around 84°F and lows near 62°F. Over 55 years of records, the warmest August 18th was in 1983 (86°F average), while the coldest was 2002 (57°F) — a 29°F range across recorded history. Rain or other precipitation has occurred on about 31% of August 18th dates historically, with the wettest August 18th recording 2.64" of rain. The last decade has been 3.0°F warmer on this date compared to 20-30 years ago.
The last decade has been 3.0°F warmer on this date compared to 20-30 years ago.
Planning for August 18th in Des Moines, IA? Stay hydrated and seek shade during peak afternoon hours. Consider bringing rain gear or an umbrella.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 87° | 73° | 80° | 0.33" | — |
| 2024 | 85° | 64° | 74° | — | — |
| 2023 | 81° | 54° | 67° | — | — |
| 2022 | 85° | 61° | 73° | 0.13" | — |
| 2021 | 88° | 67° | 77° | — | — |
| 2020 | 90° | 56° | 73° | — | — |
| 2019 | 86° | 63° | 74° | — | — |
| 2018 | 86° | 66° | 76° | — | — |
| 2017 | 82° | 60° | 71° | — | — |
| 2016 | 85° | 67° | 76° | — | — |
| 2015 | 86° | 66° | 76° | 1.32" | — |
| 2014 | 83° | 62° | 72° | — | — |
| 2013 | 81° | 51° | 66° | — | — |
| 2012 | 75° | 51° | 63° | 0.08" | — |
| 2011 | 86° | 62° | 74° | 0.05" | — |
| 2010 | 67° | 59° | 63° | 2.64" | — |
| 2009 | 80° | 60° | 70° | — | — |
| 2008 | 84° | 58° | 71° | — | — |
| 2007 | 82° | 62° | 72° | 0.81" | — |
| 2006 | 84° | 67° | 75° | 0.69" | — |
| 2005 | 86° | 62° | 74° | — | — |
| 2004 | 80° | 63° | 71° | 0.03" | — |
| 2003 | 99° | 69° | 84° | — | — |
| 2002coldest | 71° | 42° | 57° | — | — |
| 2001 | 82° | 56° | 69° | 0.74" | — |
| 2000 | 73° | 57° | 65° | — | — |
| 1999 | 89° | 58° | 73° | 1.55" | — |
| 1998 | 87° | 68° | 78° | — | — |
| 1997 | 87° | 56° | 71° | — | — |
| 1996 | 75° | 62° | 69° | — | — |
| 1995 | 94° | 72° | 83° | — | — |
| 1994 | 88° | 65° | 76° | — | — |
| 1993 | 88° | 74° | 81° | — | — |
| 1992 | 75° | 55° | 65° | — | — |
| 1991 | 80° | 62° | 71° | 0.1" | — |
| 1990 | 90° | 71° | 80° | — | — |
| 1989 | 84° | 56° | 70° | — | — |
| 1988 | 94° | 77° | 85° | 0.43" | — |
| 1987 | 78° | 61° | 69° | 0.15" | — |
| 1986 | 82° | 62° | 72° | — | — |
| 1985 | 77° | 52° | 64° | — | — |
| 1984 | 82° | 67° | 74° | — | — |
| 1983warmest | 103° | 69° | 86° | — | — |
| 1982 | 85° | 64° | 74° | — | — |
| 1981 | 74° | 48° | 61° | — | — |
| 1980 | 87° | 59° | 73° | — | — |
| 1979 | 88° | 68° | 78° | 0.58" | — |
| 1978 | 86° | 69° | 78° | — | — |
| 1977 | 78° | 47° | 62° | — | — |
| 1976 | 86° | 62° | 74° | — | — |
| 1975 | 82° | 62° | 72° | 2.51" | — |
| 1974 | 71° | 55° | 63° | 0.84" | — |
| 1973 | 90° | 71° | 80° | — | — |
| 1972 | 92° | 70° | 81° | — | — |
| 1971 | 85° | 57° | 71° | — | — |
55 years of data from ANKENY