Weather on May 18
Rockford, IL
55 Years of Data
Avg High
72°F
Avg Low
49°F
Warmest
1996
80°F avg
Coldest
2002
43°F avg
About This Date
May 18th in Rockford, IL typically brings pleasant spring weather, with average highs around 72°F and lows near 49°F. Over 55 years of records, the warmest May 18th was in 1996 (80°F average), while the coldest was 2002 (43°F) — a 37°F range across recorded history. Rain or other precipitation has occurred on about 44% of May 18th dates historically, with the wettest May 18th recording 3.91" of rain. Temperatures on this date have remained relatively stable over the past several decades.
Temperatures on this date have remained relatively stable over the past several decades.
Planning for May 18th in Rockford, IL? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Cooling Trend
0.7°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 72° | 45° | 58° | — | — |
| 2024 | 88° | 53° | 70° | — | — |
| 2023 | 76° | 41° | 58° | — | — |
| 2022 | 62° | 51° | 57° | 0.81" | — |
| 2021 | 71° | 58° | 64° | 1.22" | — |
| 2020 | 66° | 53° | 60° | — | — |
| 2019 | 69° | 47° | 58° | 0.38" | — |
| 2018 | 77° | 53° | 65° | 0.13" | — |
| 2017 | 75° | 51° | 63° | — | — |
| 2016 | 69° | 38° | 53° | — | — |
| 2015 | 69° | 47° | 58° | — | — |
| 2014 | 70° | 41° | 55° | — | — |
| 2013 | 82° | 56° | 69° | — | — |
| 2012 | 88° | 52° | 70° | — | — |
| 2011 | 58° | 46° | 52° | 0.03" | — |
| 2010 | 71° | 50° | 61° | — | — |
| 2009 | 65° | 39° | 52° | — | — |
| 2008 | 62° | 42° | 52° | — | — |
| 2007 | 74° | 39° | 56° | — | — |
| 2006 | 64° | 42° | 53° | 0.03" | — |
| 2005 | 76° | 57° | 66° | 0.46" | — |
| 2004 | 65° | 47° | 56° | 0.48" | — |
| 2003 | 74° | 50° | 62° | — | — |
| 2002coldest | 56° | 31° | 43° | — | — |
| 2001 | 77° | 52° | 64° | — | — |
| 2000 | 59° | 43° | 51° | 3.4" | — |
| 1999 | 68° | 48° | 58° | 0.51" | — |
| 1998 | 88° | 57° | 72° | — | — |
| 1997 | 77° | 42° | 60° | 0.74" | — |
| 1996warmest | 89° | 72° | 80° | — | — |
| 1995 | 61° | 45° | 53° | 0.18" | — |
| 1994 | 75° | 43° | 59° | — | — |
| 1993 | 65° | 43° | 54° | 0.03" | — |
| 1992 | 70° | 47° | 58° | — | — |
| 1991 | 51° | 47° | 49° | 0.74" | — |
| 1990 | 71° | 45° | 58° | — | — |
| 1989 | 75° | 57° | 66° | 0.23" | — |
| 1988 | 75° | 38° | 56° | — | — |
| 1987 | 82° | 60° | 71° | 3.91" | — |
| 1986 | 66° | 50° | 58° | 0.03" | — |
| 1985 | 72° | 46° | 59° | — | — |
| 1984 | 87° | 60° | 74° | — | — |
| 1983 | 64° | 45° | 54° | 0.28" | — |
| 1982 | 81° | 60° | 70° | 0.43" | — |
| 1981 | 61° | 44° | 52° | — | — |
| 1980 | 64° | 53° | 59° | 0.41" | — |
| 1979 | 83° | 57° | 70° | 0.18" | — |
| 1978 | 78° | 46° | 62° | — | — |
| 1977 | 88° | 63° | 75° | — | — |
| 1976 | 66° | 36° | 51° | — | — |
| 1975 | 88° | 48° | 68° | — | — |
| 1974 | 56° | 49° | 52° | 0.81" | — |
| 1973 | 71° | 42° | 57° | 0.23" | — |
| 1972 | 85° | 55° | 70° | — | — |
| 1971 | 80° | 64° | 72° | 0.36" | — |
55 years of data from ROCKFORD GTR ROCKFORD AP