Weather on August 20
Indianapolis, IN
55 Years of Data
Avg High
83°F
Avg Low
63°F
Warmest
1983
88°F avg
Coldest
1985
63°F avg
About This Date
August 20th in Indianapolis, IN typically brings warm summer weather, with average highs around 83°F and lows near 63°F. Over 55 years of records, the warmest August 20th was in 1983 (88°F average), while the coldest was 1985 (63°F) — a 25°F range across recorded history. Rain or other precipitation has occurred on about 29% of August 20th dates historically, with the wettest August 20th recording 2.87" of rain. The last decade has been 2.5°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.5°F warmer on this date compared to 20-30 years ago.
Planning for August 20th in Indianapolis, IN? Stay hydrated and seek shade during peak afternoon hours.
Cooling Trend
0.4°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 75° | 69° | 72° | — | — |
| 2024 | 71° | 56° | 63° | — | — |
| 2023 | 89° | 63° | 76° | — | — |
| 2022 | 82° | 64° | 73° | 0.05" | — |
| 2021 | 87° | 67° | 77° | 0.05" | — |
| 2020 | 79° | 56° | 67° | — | — |
| 2019 | 87° | 68° | 78° | 0.18" | — |
| 2018 | 81° | 66° | 73° | 1.57" | — |
| 2017 | 89° | 64° | 77° | — | — |
| 2016 | 81° | 67° | 74° | 2.87" | — |
| 2015 | 75° | 58° | 66° | 0.13" | — |
| 2014 | 82° | 64° | 73° | — | — |
| 2013 | 85° | 62° | 73° | — | — |
| 2012 | 77° | 54° | 65° | — | — |
| 2011 | 85° | 63° | 74° | — | — |
| 2010 | 89° | 67° | 78° | — | — |
| 2009 | 84° | 65° | 74° | 2.59" | — |
| 2008 | 84° | 57° | 71° | — | — |
| 2007 | 88° | 67° | 77° | — | — |
| 2006 | 86° | 67° | 76° | — | — |
| 2005 | 87° | 69° | 78° | — | — |
| 2004 | 86° | 67° | 76° | — | — |
| 2003 | 84° | 62° | 73° | — | — |
| 2002 | 80° | 64° | 72° | 0.25" | — |
| 2001 | 70° | 57° | 63° | 0.1" | — |
| 2000 | 72° | 55° | 63° | — | — |
| 1999 | 81° | 55° | 68° | — | — |
| 1998 | 78° | 57° | 68° | — | — |
| 1997 | 69° | 60° | 65° | 2.21" | — |
| 1996 | 87° | 71° | 79° | — | — |
| 1995 | 87° | 70° | 78° | — | — |
| 1994 | 78° | 58° | 68° | 0.61" | — |
| 1993 | 82° | 58° | 70° | — | — |
| 1992 | 76° | 54° | 65° | — | — |
| 1991 | 76° | 59° | 67° | — | — |
| 1990 | 91° | 68° | 80° | — | — |
| 1989 | 79° | 64° | 71° | 1.6" | — |
| 1988 | 87° | 71° | 79° | — | — |
| 1987 | 83° | 64° | 73° | — | — |
| 1986 | 87° | 61° | 74° | — | — |
| 1985coldest | 73° | 53° | 63° | 0.13" | — |
| 1984 | 82° | 59° | 71° | — | — |
| 1983warmest | 98° | 78° | 88° | — | — |
| 1982 | 86° | 54° | 70° | — | — |
| 1981 | 83° | 59° | 71° | — | — |
| 1980 | 87° | 67° | 77° | 0.13" | — |
| 1979 | 86° | 67° | 76° | 1.52" | — |
| 1978 | 83° | 56° | 69° | 0.25" | — |
| 1977 | 76° | 56° | 66° | — | — |
| 1976 | 82° | 60° | 71° | — | — |
| 1975 | 86° | 68° | 77° | — | — |
| 1974 | 87° | 63° | 75° | — | — |
| 1973 | 86° | 68° | 77° | — | — |
| 1972 | 91° | 69° | 80° | — | — |
| 1971 | 87° | 66° | 77° | — | — |
55 years of data from INDIANAPOLIS SE SIDE