Weather on April 21
Indianapolis, IN
55 Years of Data
Avg High
64°F
Avg Low
43°F
Warmest
1985
74°F avg
Coldest
2011
36°F avg
About This Date
April 21st in Indianapolis, IN typically brings mild spring weather, with average highs around 64°F and lows near 43°F. Over 55 years of records, the warmest April 21st was in 1985 (74°F average), while the coldest was 2011 (36°F) — a 38°F range across recorded history. Rain or other precipitation has occurred on about 45% of April 21st dates historically, with the wettest April 21st recording 4.01" of rain. The last decade has been 3.8°F cooler on this date compared to 20-30 years ago.
The last decade has been 3.8°F cooler on this date compared to 20-30 years ago.
Planning for April 21st in Indianapolis, IN? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Cooling Trend
1.1°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 70° | 47° | 58° | 0.53" | — |
| 2024 | 54° | 36° | 45° | — | — |
| 2023 | 68° | 45° | 56° | 1.27" | — |
| 2022 | 70° | 50° | 60° | 0.56" | — |
| 2021 | 47° | 25° | 36° | 0.05" | — |
| 2020 | 54° | 37° | 45° | 0.03" | — |
| 2019 | 72° | 34° | 53° | — | — |
| 2018 | 62° | 36° | 49° | — | — |
| 2017 | 59° | 45° | 52° | — | — |
| 2016 | 68° | 56° | 62° | 1.35" | — |
| 2015 | 62° | 42° | 52° | — | — |
| 2014 | 75° | 45° | 60° | — | — |
| 2013 | 46° | 31° | 38° | — | — |
| 2012 | 75° | 40° | 57° | 0.3" | — |
| 2011coldest | 44° | 29° | 36° | — | — |
| 2010 | 66° | 37° | 52° | — | — |
| 2009 | 56° | 41° | 48° | 0.1" | — |
| 2008 | 63° | 48° | 55° | — | — |
| 2007 | 67° | 39° | 53° | — | — |
| 2006 | 75° | 55° | 65° | — | — |
| 2005 | 78° | 48° | 63° | 1.07" | — |
| 2004 | 69° | 52° | 60° | 0.64" | — |
| 2003 | 54° | 40° | 47° | — | — |
| 2002 | 65° | 41° | 53° | 2.95" | — |
| 2001 | 69° | 53° | 61° | 0.05" | — |
| 2000 | 74° | 41° | 57° | 2.34" | — |
| 1999 | 62° | 42° | 52° | 1.63" | — |
| 1998 | 64° | 48° | 56° | 0.33" | — |
| 1997 | 59° | 41° | 50° | 0.71" | — |
| 1996 | 70° | 41° | 55° | 1.07" | — |
| 1995 | 68° | 42° | 55° | 0.1" | — |
| 1994 | 55° | 40° | 47° | — | — |
| 1993 | 49° | 30° | 39° | — | — |
| 1992 | 68° | 46° | 57° | — | — |
| 1991 | 47° | 40° | 43° | 0.05" | — |
| 1990 | 62° | 53° | 58° | 1.78" | — |
| 1989 | 65° | 48° | 56° | — | — |
| 1988 | 65° | 39° | 52° | — | — |
| 1987 | 83° | 54° | 68° | — | — |
| 1986 | 55° | 44° | 50° | 4.01" | — |
| 1985warmest | 85° | 63° | 74° | — | — |
| 1984 | 59° | 36° | 47° | 0.48" | — |
| 1983 | 52° | 28° | 40° | — | — |
| 1982 | 62° | 33° | 48° | — | — |
| 1981 | 54° | 31° | 42° | — | — |
| 1980 | 77° | 49° | 63° | — | — |
| 1979 | 72° | 49° | 60° | — | — |
| 1978 | 46° | 37° | 42° | 0.03" | — |
| 1977 | 77° | 62° | 70° | — | — |
| 1976 | 74° | 57° | 65° | 0.3" | — |
| 1975 | 50° | 33° | 42° | — | — |
| 1974 | 78° | 43° | 60° | — | — |
| 1973 | 75° | 57° | 66° | 0.05" | — |
| 1972 | 56° | 43° | 49° | — | — |
| 1971 | 81° | 54° | 67° | — | — |
55 years of data from INDIANAPOLIS SE SIDE