Weather on May 20
Des Moines, IA
55 Years of Data
Avg High
75°F
Avg Low
52°F
Warmest
1975
80°F avg
Coldest
2015
48°F avg
About This Date
May 20th in Des Moines, IA typically brings pleasant spring weather, with average highs around 75°F and lows near 52°F. Over 55 years of records, the warmest May 20th was in 1975 (80°F average), while the coldest was 2015 (48°F) — a 32°F range across recorded history. Rain or other precipitation has occurred on about 31% of May 20th dates historically, with the wettest May 20th recording 5.08" of rain. The last decade has been 1.3°F cooler on this date compared to 20-30 years ago.
The last decade has been 1.3°F cooler on this date compared to 20-30 years ago.
Planning for May 20th in Des Moines, IA? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Cooling Trend
0.8°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 65° | 50° | 57° | 2.79" | — |
| 2024 | 84° | 63° | 73° | 1.37" | — |
| 2023 | 72° | 44° | 58° | — | — |
| 2022 | 73° | 54° | 63° | — | — |
| 2021 | 74° | 65° | 69° | 1.14" | — |
| 2020 | 62° | 51° | 57° | — | — |
| 2019 | 58° | 40° | 49° | 0.05" | — |
| 2018 | 69° | 57° | 63° | 2.34" | — |
| 2017 | 50° | 46° | 48° | 0.86" | — |
| 2016 | 70° | 53° | 61° | — | — |
| 2015coldest | 57° | 39° | 48° | 0.18" | — |
| 2014 | 73° | 56° | 64° | — | — |
| 2013 | 87° | 59° | 73° | 3.91" | — |
| 2012 | 88° | 63° | 75° | — | — |
| 2011 | 75° | 53° | 64° | — | — |
| 2010 | 78° | 50° | 64° | — | — |
| 2009 | 88° | 58° | 73° | — | — |
| 2008 | 76° | 46° | 61° | 0.15" | — |
| 2007 | 83° | 61° | 72° | — | — |
| 2006 | 88° | 49° | 68° | — | — |
| 2005 | 84° | 53° | 69° | — | — |
| 2004 | 81° | 55° | 68° | — | — |
| 2003 | 72° | 44° | 58° | 0.2" | — |
| 2002 | 65° | 34° | 49° | — | — |
| 2001 | 84° | 52° | 68° | — | — |
| 2000 | 65° | 40° | 52° | — | — |
| 1999 | 77° | 52° | 64° | — | — |
| 1998 | 93° | 58° | 75° | 5.08" | — |
| 1997 | 62° | 36° | 49° | — | — |
| 1996 | 70° | 49° | 59° | 0.25" | — |
| 1995 | 74° | 42° | 58° | — | — |
| 1994 | 80° | 44° | 62° | — | — |
| 1993 | 57° | 44° | 51° | — | — |
| 1992 | 82° | 57° | 70° | — | — |
| 1991 | 65° | 49° | 57° | — | — |
| 1990 | 71° | 45° | 58° | — | — |
| 1989 | 78° | 49° | 63° | — | — |
| 1988 | 86° | 55° | 71° | — | — |
| 1987 | 82° | 64° | 73° | 0.64" | — |
| 1986 | 69° | 47° | 58° | — | — |
| 1985 | 75° | 58° | 66° | 0.58" | — |
| 1984 | 79° | 53° | 66° | — | — |
| 1983 | 70° | 46° | 58° | — | — |
| 1982 | 73° | 57° | 65° | 0.43" | — |
| 1981 | 77° | 41° | 59° | — | — |
| 1980 | 75° | 53° | 64° | — | — |
| 1979 | 69° | 51° | 60° | — | — |
| 1978 | 81° | 53° | 67° | 1.04" | — |
| 1977 | 87° | 62° | 75° | — | — |
| 1976 | 81° | 59° | 70° | — | — |
| 1975warmest | 90° | 71° | 80° | — | — |
| 1974 | 70° | 56° | 63° | 0.1" | — |
| 1973 | 81° | 54° | 67° | — | — |
| 1972 | 85° | 56° | 70° | — | — |
| 1971 | 60° | 43° | 51° | — | — |
55 years of data from ANKENY