Weather on September 21
Carmel, IN
55 Years of Data
Avg High
77°F
Avg Low
52°F
Warmest
2018
81°F avg
Coldest
1991
48°F avg
About This Date
September 21st in Carmel, IN typically brings pleasant fall weather, with average highs around 77°F and lows near 52°F — a 25°F daily swing. Over 54 years of records, the warmest September 21st was in 2018 (81°F average), while the coldest was 1991 (48°F) — a 33°F range across recorded history. Rain or other precipitation has occurred on about 31% of September 21st dates historically, with the wettest September 21st recording 3.73" of rain. The last decade has been 8.5°F warmer on this date compared to 20-30 years ago.
The last decade has been 8.5°F warmer on this date compared to 20-30 years ago.
Planning for September 21st in Carmel, IN? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Warming Trend
2.0°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 89° | 61° | 75° | 0.1" | — |
| 2024 | 88° | 60° | 74° | — | — |
| 2023 | 81° | 61° | 71° | — | — |
| 2022 | 85° | 58° | 71° | — | — |
| 2021 | 77° | 59° | 68° | 0.91" | — |
| 2020 | 72° | 42° | 57° | — | — |
| 2019 | 88° | 65° | 76° | — | — |
| 2018warmest | 89° | 73° | 81° | — | — |
| 2017 | 88° | 65° | 76° | — | — |
| 2016 | 86° | 59° | 73° | — | — |
| 2015 | 71° | 48° | 60° | — | — |
| 2014 | 78° | 51° | 65° | 0.53" | — |
| 2013 | 78° | 54° | 66° | 1.09" | — |
| 2012 | 70° | 46° | 58° | — | — |
| 2011 | 76° | 59° | 67° | — | — |
| 2010 | 85° | 63° | 74° | — | — |
| 2009 | 76° | 54° | 65° | 0.1" | — |
| 2008 | 84° | 57° | 71° | 0.2" | — |
| 2007 | 88° | 61° | 74° | — | — |
| 2006 | 64° | 41° | 53° | — | — |
| 2005 | 85° | 59° | 72° | 0.05" | — |
| 2004 | 82° | 46° | 64° | — | — |
| 2003 | 72° | 44° | 58° | — | — |
| 2002 | 73° | 61° | 67° | 3.73" | — |
| 2001 | 75° | 59° | 67° | — | — |
| 2000 | 83° | 48° | 65° | 0.91" | — |
| 1999 | 71° | 45° | 58° | — | — |
| 1997 | 74° | 48° | 61° | — | — |
| 1996 | 74° | 48° | 61° | 0.91" | — |
| 1995 | 65° | 57° | 61° | 0.1" | — |
| 1994 | 81° | 49° | 65° | — | — |
| 1993 | 74° | 58° | 66° | — | — |
| 1992 | 70° | 51° | 60° | 0.76" | — |
| 1991coldest | 60° | 35° | 48° | — | — |
| 1990 | 70° | 49° | 59° | — | — |
| 1989 | 77° | 53° | 65° | — | — |
| 1988 | 75° | 46° | 61° | — | — |
| 1987 | 72° | 47° | 59° | — | — |
| 1986 | 75° | 57° | 66° | 0.05" | — |
| 1985 | 84° | 45° | 64° | — | — |
| 1984 | 86° | 53° | 70° | — | — |
| 1983 | 84° | 42° | 63° | 1.52" | — |
| 1982 | 69° | 37° | 53° | — | — |
| 1981 | 76° | 52° | 64° | — | — |
| 1980 | 87° | 65° | 76° | — | — |
| 1979 | 75° | 47° | 61° | — | — |
| 1978 | 89° | 67° | 78° | — | — |
| 1977 | 68° | 43° | 55° | — | — |
| 1976 | 69° | 40° | 54° | 0.03" | — |
| 1975 | 67° | 47° | 57° | 0.03" | — |
| 1974 | 72° | 52° | 62° | — | — |
| 1973 | 73° | 51° | 62° | — | — |
| 1972 | 78° | 55° | 67° | — | — |
| 1971 | 62° | 41° | 52° | 0.66" | — |
54 years of data from CARMEL 3 E