Weather on August 18
Rockford, IL
55 Years of Data
Avg High
81°F
Avg Low
61°F
Warmest
1972
81°F avg
Coldest
1977
59°F avg
About This Date
August 18th in Rockford, IL typically brings warm summer weather, with average highs around 81°F and lows near 61°F. Over 55 years of records, the warmest August 18th was in 1972 (81°F average), while the coldest was 1977 (59°F) — a 22°F range across recorded history. Rain or other precipitation has occurred on about 36% of August 18th dates historically, with the wettest August 18th recording 7.29" of rain. The last decade has been 4.7°F warmer on this date compared to 20-30 years ago.
The last decade has been 4.7°F warmer on this date compared to 20-30 years ago.
Planning for August 18th in Rockford, IL? Stay hydrated and seek shade during peak afternoon hours. Consider bringing rain gear or an umbrella.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 87° | 68° | 78° | 1.6" | — |
| 2024 | 80° | 65° | 72° | — | — |
| 2023 | 75° | 52° | 63° | — | — |
| 2022 | 83° | 56° | 69° | — | — |
| 2021 | 88° | 65° | 76° | — | — |
| 2020 | 83° | 59° | 71° | — | — |
| 2019 | 80° | 66° | 73° | 0.51" | — |
| 2018 | 83° | 66° | 74° | — | — |
| 2017 | 80° | 63° | 71° | — | — |
| 2016 | 88° | 68° | 78° | 0.46" | — |
| 2015 | 82° | 67° | 74° | 7.29" | — |
| 2014 | 84° | 62° | 73° | — | — |
| 2013 | 83° | 54° | 68° | — | — |
| 2012 | 77° | 50° | 64° | — | — |
| 2011 | 83° | 61° | 72° | — | — |
| 2010 | 80° | 61° | 70° | — | — |
| 2009 | 79° | 58° | 68° | — | — |
| 2008 | 83° | 61° | 72° | — | — |
| 2007 | 65° | 57° | 61° | 1.52" | — |
| 2006 | 77° | 67° | 72° | 0.18" | — |
| 2005 | 83° | 67° | 75° | 5.66" | — |
| 2004 | 77° | 57° | 67° | — | — |
| 2003 | 87° | 60° | 74° | — | — |
| 2002 | 78° | 51° | 65° | 0.03" | — |
| 2001 | 75° | 60° | 68° | 0.48" | — |
| 2000 | 76° | 57° | 66° | — | — |
| 1999 | 70° | 59° | 64° | 0.25" | — |
| 1998 | 75° | 58° | 66° | — | — |
| 1997 | 69° | 57° | 63° | — | — |
| 1996 | 77° | 63° | 70° | 0.08" | — |
| 1995 | 87° | 73° | 80° | — | — |
| 1994 | 77° | 63° | 70° | 2.92" | — |
| 1993 | 85° | 67° | 76° | — | — |
| 1992 | 78° | 57° | 68° | 0.41" | — |
| 1991 | 85° | 60° | 72° | — | — |
| 1990 | 91° | 70° | 80° | 2.46" | — |
| 1989 | 80° | 52° | 66° | — | — |
| 1988 | 92° | 70° | 81° | 1.04" | — |
| 1987 | 78° | 61° | 69° | 1.14" | — |
| 1986 | 79° | 60° | 69° | — | — |
| 1985 | 76° | 56° | 66° | 0.08" | — |
| 1984 | 80° | 63° | 71° | — | — |
| 1983 | 91° | 69° | 80° | — | — |
| 1982 | 82° | 55° | 69° | — | — |
| 1981 | 77° | 47° | 62° | — | — |
| 1980 | 84° | 64° | 74° | — | — |
| 1979 | 77° | 68° | 73° | 0.03" | — |
| 1978 | 87° | 71° | 79° | 0.28" | — |
| 1977coldest | 70° | 49° | 59° | — | — |
| 1976 | 85° | 58° | 71° | — | — |
| 1975 | 79° | 61° | 70° | — | — |
| 1974 | 85° | 58° | 71° | — | — |
| 1973 | 89° | 61° | 75° | 0.13" | — |
| 1972warmest | 91° | 71° | 81° | — | — |
| 1971 | 86° | 54° | 70° | — | — |
55 years of data from ROCKFORD GTR ROCKFORD AP