Weather on May 21
Indianapolis, IN
55 Years of Data
Avg High
75°F
Avg Low
54°F
Warmest
1975
79°F avg
Coldest
2002
44°F avg
About This Date
May 21st in Indianapolis, IN typically brings pleasant spring weather, with average highs around 75°F and lows near 54°F. Over 55 years of records, the warmest May 21st was in 1975 (79°F average), while the coldest was 2002 (44°F) — a 35°F range across recorded history. Rain or other precipitation has occurred on about 25% of May 21st dates historically, with the wettest May 21st recording 4.88" of rain. The last decade has been 3.8°F warmer on this date compared to 20-30 years ago.
The last decade has been 3.8°F warmer on this date compared to 20-30 years ago.
Planning for May 21st in Indianapolis, IN? Great weather for outdoor activities.
Cooling Trend
0.6°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 60° | 52° | 56° | 0.2" | — |
| 2024 | 86° | 64° | 75° | — | — |
| 2023 | 77° | 42° | 60° | — | — |
| 2022 | 82° | 64° | 73° | 0.2" | — |
| 2021 | 83° | 60° | 71° | — | — |
| 2020 | 63° | 52° | 57° | 0.03" | — |
| 2019 | 56° | 45° | 50° | 0.15" | — |
| 2018 | 81° | 62° | 71° | — | — |
| 2017 | 75° | 57° | 66° | 0.18" | — |
| 2016 | 73° | 54° | 63° | 1.73" | — |
| 2015 | 62° | 46° | 54° | — | — |
| 2014 | 85° | 63° | 74° | 2.72" | — |
| 2013 | 83° | 62° | 72° | 0.2" | — |
| 2012 | 88° | 60° | 74° | — | — |
| 2011 | 78° | 55° | 67° | — | — |
| 2010 | 69° | 52° | 60° | 1.52" | — |
| 2009 | 82° | 57° | 70° | — | — |
| 2008 | 61° | 45° | 53° | — | — |
| 2007 | 80° | 52° | 66° | — | — |
| 2006 | 67° | 48° | 57° | — | — |
| 2005 | 67° | 46° | 56° | 0.03" | — |
| 2004 | 82° | 69° | 76° | — | — |
| 2003 | 70° | 45° | 57° | — | — |
| 2002coldest | 53° | 35° | 44° | — | — |
| 2001 | 79° | 58° | 68° | — | — |
| 2000 | 56° | 46° | 51° | — | — |
| 1999 | 76° | 56° | 66° | — | — |
| 1998 | 84° | 58° | 71° | — | — |
| 1997 | 63° | 40° | 51° | — | — |
| 1996 | 75° | 53° | 64° | — | — |
| 1995 | 72° | 48° | 60° | — | — |
| 1994 | 79° | 53° | 66° | — | — |
| 1993 | 64° | 40° | 52° | — | — |
| 1992 | 84° | 60° | 72° | — | — |
| 1991 | 82° | 67° | 74° | — | — |
| 1990 | 74° | 51° | 62° | 0.08" | — |
| 1989 | 80° | 47° | 63° | — | — |
| 1988 | 79° | 61° | 70° | — | — |
| 1987 | 87° | 69° | 78° | — | — |
| 1986 | 54° | 44° | 49° | — | — |
| 1985 | 80° | 59° | 70° | 0.53" | — |
| 1984 | 76° | 60° | 68° | 4.88" | — |
| 1983 | 72° | 55° | 63° | — | — |
| 1982 | 85° | 58° | 71° | — | — |
| 1981 | 72° | 52° | 62° | — | — |
| 1980 | 72° | 55° | 63° | — | — |
| 1979 | 72° | 51° | 61° | — | — |
| 1978 | 81° | 53° | 67° | 0.48" | — |
| 1977 | 89° | 65° | 77° | — | — |
| 1976 | 81° | 51° | 66° | — | — |
| 1975warmest | 90° | 69° | 79° | — | — |
| 1974 | 82° | 59° | 71° | — | — |
| 1973 | 69° | 47° | 58° | — | — |
| 1972 | 83° | 59° | 71° | — | — |
| 1971 | 72° | 48° | 60° | — | — |
55 years of data from INDIANAPOLIS SE SIDE