Weather on December 21
Indianapolis, IN
55 Years of Data
Avg High
39°F
Avg Low
22°F
Warmest
2015
47°F avg
Coldest
1989
3°F avg
About This Date
December 21st in Indianapolis, IN typically brings cold winter weather, with average highs around 39°F and lows near 22°F. Over 55 years of records, the warmest December 21st was in 2015 (47°F average), while the coldest was 1989 (3°F) — a 44°F range across recorded history. Precipitation has occurred on 35% of recorded December 21st dates, with snow falling 7% of the time (heaviest snowfall: 3"). The last decade has been 9.2°F warmer on this date compared to 20-30 years ago.
The last decade has been 9.2°F warmer on this date compared to 20-30 years ago.
Planning for December 21st in Indianapolis, IN? Bundle up with warm layers and protect extremities from the cold. Consider bringing rain gear or an umbrella.
Warming Trend
1.4°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 39° | 22° | 30° | — | — |
| 2024 | 33° | 21° | 27° | — | — |
| 2023 | 49° | 33° | 41° | — | — |
| 2022 | 39° | 22° | 30° | — | — |
| 2021 | 44° | 23° | 34° | — | — |
| 2020 | 46° | 35° | 41° | 0.13" | — |
| 2019 | 47° | 26° | 36° | — | — |
| 2018 | 42° | 32° | 37° | 0.25" | — |
| 2017 | 51° | 26° | 39° | — | — |
| 2016 | 39° | 20° | 29° | — | — |
| 2015warmest | 53° | 41° | 47° | 1.14" | — |
| 2014 | 36° | 19° | 27° | — | — |
| 2013 | 52° | 36° | 44° | 6.65" | — |
| 2012 | 53° | 24° | 39° | 0.56" | 2" |
| 2011 | 53° | 39° | 46° | 1.4" | — |
| 2010 | 30° | 25° | 27° | 1.17" | 3" |
| 2009 | 33° | 26° | 30° | 0.13" | 1" |
| 2008 | 30° | 7° | 18° | — | — |
| 2007 | 40° | 28° | 34° | — | — |
| 2006 | 46° | 27° | 36° | 1.17" | — |
| 2005 | 26° | 6° | 16° | — | — |
| 2004 | 33° | 9° | 21° | — | — |
| 2003 | 29° | 13° | 21° | — | — |
| 2002 | 41° | 31° | 36° | — | — |
| 2001 | 44° | 22° | 33° | — | — |
| 2000 | 22° | 2° | 12° | 0.05" | 0.5" |
| 1999 | 42° | 13° | 27° | — | — |
| 1998 | 47° | 33° | 40° | 0.08" | — |
| 1997 | 40° | 31° | 35° | — | — |
| 1996 | 16° | 6° | 11° | — | — |
| 1995 | 22° | 17° | 19° | — | — |
| 1994 | 51° | 28° | 40° | — | — |
| 1993 | 33° | 28° | 31° | — | — |
| 1992 | 35° | 22° | 28° | — | — |
| 1991 | 39° | 26° | 33° | — | — |
| 1990 | 53° | 32° | 43° | 0.48" | — |
| 1989coldest | 13° | -7° | 3° | — | — |
| 1988 | 61° | 31° | 46° | — | — |
| 1987 | 43° | 25° | 34° | — | — |
| 1986 | 44° | 27° | 35° | — | — |
| 1985 | 22° | 1° | 11° | — | — |
| 1984 | 41° | 29° | 35° | 0.53" | — |
| 1983 | 26° | 9° | 17° | 0.08" | — |
| 1982 | 34° | 31° | 32° | — | — |
| 1981 | 25° | -7° | 9° | 0.3" | — |
| 1980 | 21° | 5° | 13° | — | — |
| 1979 | 48° | 30° | 39° | — | — |
| 1978 | 62° | 28° | 45° | 1.5" | — |
| 1977 | 35° | 20° | 27° | — | — |
| 1976 | 35° | 4° | 19° | 0.48" | — |
| 1975 | 37° | 24° | 31° | — | — |
| 1974 | 41° | 28° | 35° | 0.15" | — |
| 1973 | 27° | 11° | 19° | 0.03" | — |
| 1972 | 38° | 36° | 37° | — | — |
| 1971 | 44° | 30° | 37° | — | — |
55 years of data from INDIANAPOLIS SE SIDE