Weather on August 31
Indianapolis, IN
55 Years of Data
Avg High
81°F
Avg Low
61°F
Warmest
1983
81°F avg
Coldest
2009
58°F avg
About This Date
August 31st in Indianapolis, IN typically brings warm summer weather, with average highs around 81°F and lows near 61°F. Over 55 years of records, the warmest August 31st was in 1983 (81°F average), while the coldest was 2009 (58°F) — a 23°F range across recorded history. Rain or other precipitation has occurred on about 27% of August 31st dates historically, with the wettest August 31st recording 9.86" of rain. The last decade has been 1.1°F cooler on this date compared to 20-30 years ago.
The last decade has been 1.1°F cooler on this date compared to 20-30 years ago.
Planning for August 31st in Indianapolis, IN? Stay hydrated and seek shade during peak afternoon hours.
Cooling Trend
0.3°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 75° | 49° | 62° | — | — |
| 2024 | 81° | 66° | 73° | 0.3" | — |
| 2023 | 75° | 53° | 64° | — | — |
| 2022 | 79° | 56° | 67° | — | — |
| 2021 | 81° | 67° | 74° | 0.03" | — |
| 2020 | 82° | 59° | 71° | — | — |
| 2019 | 72° | 60° | 66° | 0.66" | — |
| 2018 | 85° | 61° | 73° | — | — |
| 2017 | 79° | 59° | 69° | — | — |
| 2016 | 84° | 67° | 75° | — | — |
| 2015 | 86° | 66° | 76° | — | — |
| 2014 | 82° | 70° | 76° | 0.03" | — |
| 2013 | 93° | 69° | 81° | 1.04" | — |
| 2012 | 87° | 62° | 75° | — | — |
| 2011 | 83° | 57° | 70° | 0.18" | — |
| 2010 | 87° | 69° | 78° | — | — |
| 2009coldest | 67° | 49° | 58° | — | — |
| 2008 | 85° | 58° | 71° | — | — |
| 2007 | 77° | 53° | 65° | — | — |
| 2006 | 76° | 64° | 70° | 0.03" | — |
| 2005 | 70° | 66° | 68° | 9.86" | — |
| 2004 | 77° | 53° | 65° | — | — |
| 2003 | 75° | 61° | 68° | — | — |
| 2002 | 84° | 61° | 72° | — | — |
| 2001 | 87° | 65° | 76° | 2.16" | — |
| 2000 | 87° | 68° | 78° | — | — |
| 1999 | 77° | 52° | 64° | — | — |
| 1998 | 87° | 58° | 72° | — | — |
| 1997 | 76° | 68° | 72° | — | — |
| 1996 | 82° | 57° | 70° | — | — |
| 1995 | 91° | 65° | 78° | — | — |
| 1994 | 74° | 53° | 63° | — | — |
| 1993 | 89° | 68° | 79° | 0.53" | — |
| 1992 | 74° | 53° | 63° | — | — |
| 1991 | 85° | 59° | 72° | — | — |
| 1990 | 81° | 62° | 71° | — | — |
| 1989 | 83° | 62° | 72° | — | — |
| 1988 | 77° | 55° | 66° | — | — |
| 1987 | 81° | 56° | 68° | — | — |
| 1986 | 78° | 45° | 61° | — | — |
| 1985 | 79° | 62° | 70° | — | — |
| 1984 | 92° | 54° | 73° | — | — |
| 1983warmest | 90° | 73° | 81° | — | — |
| 1982 | 74° | 63° | 68° | 1.47" | — |
| 1981 | 83° | 64° | 73° | 1.91" | — |
| 1980 | 85° | 65° | 75° | — | — |
| 1979 | 88° | 63° | 75° | — | — |
| 1978 | 64° | 57° | 61° | 2.08" | — |
| 1977 | 85° | 68° | 76° | — | — |
| 1976 | 78° | 51° | 65° | — | — |
| 1975 | 79° | 68° | 73° | 0.08" | — |
| 1974 | 80° | 61° | 70° | — | — |
| 1973 | 88° | 69° | 78° | 0.13" | — |
| 1972 | 88° | 60° | 74° | — | — |
| 1971 | 86° | 61° | 73° | — | — |
55 years of data from INDIANAPOLIS SE SIDE