Weather on October 21
Indianapolis, IN
55 Years of Data
Avg High
62°F
Avg Low
42°F
Warmest
1979
72°F avg
Coldest
1989
35°F avg
About This Date
October 21st in Indianapolis, IN typically brings mild fall weather, with average highs around 62°F and lows near 42°F. Over 53 years of records, the warmest October 21st was in 1979 (72°F average), while the coldest was 1989 (35°F) — a 37°F range across recorded history. Precipitation has occurred on 25% of recorded October 21st dates, with snow falling 2% of the time. The last decade has been 2.6°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.6°F warmer on this date compared to 20-30 years ago.
Planning for October 21st in Indianapolis, IN? Great weather for outdoor activities.
Warming Trend
0.8°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 64° | 45° | 54° | 0.03" | — |
| 2024 | 75° | 43° | 59° | — | — |
| 2023 | 71° | 38° | 54° | — | — |
| 2022 | 72° | 42° | 57° | — | — |
| 2021 | 62° | 50° | 56° | 0.03" | — |
| 2020 | 63° | 53° | 58° | 3.38" | — |
| 2019 | 65° | 52° | 58° | 1.4" | — |
| 2018 | 50° | 28° | 39° | — | — |
| 2017 | 75° | 53° | 64° | — | — |
| 2016 | 56° | 43° | 49° | 0.36" | — |
| 2015 | 75° | 52° | 63° | — | — |
| 2014 | 57° | 47° | 52° | — | — |
| 2012 | 55° | 36° | 45° | — | — |
| 2011 | 43° | 37° | 40° | 0.43" | — |
| 2010 | 68° | 37° | 53° | — | — |
| 2009 | 68° | 44° | 56° | — | — |
| 2008 | 67° | 36° | 51° | — | — |
| 2007 | 72° | 50° | 61° | — | — |
| 2006 | 51° | 38° | 44° | — | — |
| 2004 | 55° | 49° | 52° | — | — |
| 2003 | 79° | 52° | 65° | — | — |
| 2002 | 53° | 32° | 43° | — | — |
| 2001 | 71° | 49° | 60° | — | — |
| 2000 | 72° | 47° | 59° | — | — |
| 1999 | 56° | 31° | 43° | — | — |
| 1998 | 60° | 43° | 51° | — | — |
| 1997 | 58° | 38° | 48° | — | — |
| 1996 | 60° | 37° | 49° | — | — |
| 1995 | 42° | 33° | 38° | — | — |
| 1994 | 68° | 39° | 54° | — | — |
| 1993 | 65° | 41° | 53° | 1.6" | — |
| 1992 | 63° | 40° | 51° | — | — |
| 1991 | 65° | 34° | 49° | — | — |
| 1990 | 65° | 40° | 52° | — | — |
| 1989coldest | 40° | 31° | 35° | 0.2" | 0.8" |
| 1988 | 53° | 36° | 44° | 0.46" | — |
| 1987 | 67° | 33° | 50° | 0.05" | — |
| 1986 | 68° | 39° | 54° | — | — |
| 1985 | 62° | 50° | 56° | 0.3" | — |
| 1984 | 48° | 67° | 57° | 1.52" | — |
| 1983 | 54° | 51° | 52° | 2.95" | — |
| 1982 | 46° | 38° | 42° | — | — |
| 1981 | 70° | 38° | 54° | — | — |
| 1980 | 65° | 44° | 54° | — | — |
| 1979warmest | 82° | 63° | 72° | — | — |
| 1978 | 74° | 39° | 56° | — | — |
| 1977 | 63° | 33° | 48° | — | — |
| 1976 | 46° | 34° | 40° | — | — |
| 1975 | 66° | 43° | 54° | — | — |
| 1974 | 48° | 25° | 36° | — | — |
| 1973 | 65° | 43° | 54° | — | — |
| 1972 | 54° | 27° | 40° | — | — |
| 1971 | 80° | 56° | 68° | — | — |
53 years of data from INDIANAPOLIS SE SIDE