Weather on August 15
Rockford, IL
55 Years of Data
Avg High
82°F
Avg Low
60°F
Warmest
1988
88°F avg
Coldest
1979
57°F avg
About This Date
August 15th in Rockford, IL typically brings warm summer weather, with average highs around 82°F and lows near 60°F. Over 55 years of records, the warmest August 15th was in 1988 (88°F average), while the coldest was 1979 (57°F) — a 31°F range across recorded history. Rain or other precipitation has occurred on about 24% of August 15th dates historically, with the wettest August 15th recording 4.01" of rain. The last decade has been 1.6°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.6°F warmer on this date compared to 20-30 years ago.
Planning for August 15th in Rockford, IL? Stay hydrated and seek shade during peak afternoon hours.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 87° | 64° | 76° | — | — |
| 2024 | 78° | 67° | 72° | 1.52" | — |
| 2023 | 77° | 59° | 68° | — | — |
| 2022 | 80° | 59° | 70° | — | — |
| 2021 | 80° | 54° | 67° | — | — |
| 2020 | 83° | 63° | 73° | — | — |
| 2019 | 81° | 60° | 70° | — | — |
| 2018 | 83° | 69° | 76° | 0.66" | — |
| 2017 | 85° | 61° | 73° | — | — |
| 2016 | 82° | 64° | 73° | 0.03" | — |
| 2015 | 92° | 66° | 79° | — | — |
| 2014 | 79° | 50° | 64° | — | — |
| 2013 | 78° | 53° | 66° | — | — |
| 2012 | 84° | 63° | 73° | — | — |
| 2011 | 81° | 54° | 67° | — | — |
| 2010 | 82° | 61° | 71° | — | — |
| 2009 | 86° | 63° | 74° | — | — |
| 2008 | 80° | 58° | 69° | — | — |
| 2007 | 79° | 68° | 73° | 0.1" | — |
| 2006 | 83° | 54° | 68° | — | — |
| 2005 | 82° | 58° | 70° | — | — |
| 2004 | 75° | 46° | 61° | — | — |
| 2003 | 90° | 67° | 78° | — | — |
| 2002 | 84° | 57° | 71° | 0.03" | — |
| 2001 | 72° | 61° | 66° | 1.24" | — |
| 2000 | 91° | 68° | 80° | — | — |
| 1999 | 78° | 50° | 64° | — | — |
| 1998 | 81° | 62° | 71° | 0.08" | — |
| 1997 | 84° | 67° | 75° | 1.09" | — |
| 1996 | 74° | 58° | 66° | — | — |
| 1995 | 83° | 64° | 73° | 4.01" | — |
| 1994 | 77° | 50° | 64° | — | — |
| 1993 | 84° | 67° | 75° | 1.91" | — |
| 1992 | 70° | 48° | 59° | — | — |
| 1991 | 87° | 62° | 75° | — | — |
| 1990 | 84° | 64° | 74° | — | — |
| 1989 | 78° | 58° | 68° | — | — |
| 1988warmest | 99° | 77° | 88° | — | — |
| 1987 | 90° | 73° | 81° | — | — |
| 1986 | 81° | 67° | 74° | — | — |
| 1985 | 78° | 60° | 69° | — | — |
| 1984 | 91° | 59° | 75° | — | — |
| 1983 | 90° | 62° | 76° | — | — |
| 1982 | 82° | 60° | 71° | — | — |
| 1981 | 85° | 67° | 76° | 0.08" | — |
| 1980 | 77° | 61° | 69° | — | — |
| 1979coldest | 68° | 46° | 57° | — | — |
| 1978 | 89° | 67° | 78° | 1.42" | — |
| 1977 | 79° | 54° | 66° | 0.08" | — |
| 1976 | 73° | 50° | 62° | — | — |
| 1975 | 84° | 63° | 73° | — | — |
| 1974 | 87° | 62° | 75° | — | — |
| 1973 | 81° | 57° | 69° | — | — |
| 1972 | 78° | 66° | 72° | — | — |
| 1971 | 79° | 56° | 67° | — | — |
55 years of data from ROCKFORD GTR ROCKFORD AP