Weather on May 9
Joliet, IL
55 Years of Data
Avg High
71°F
Avg Low
47°F
Warmest
2014
77°F avg
Coldest
2020
38°F avg
About This Date
May 9th in Joliet, IL typically brings pleasant spring weather, with average highs around 71°F and lows near 47°F. Over 53 years of records, the warmest May 9th was in 2014 (77°F average), while the coldest was 2020 (38°F) — a 39°F range across recorded history. Rain or other precipitation has occurred on about 36% of May 9th dates historically, with the wettest May 9th recording 4.57" of rain. The last decade has been 9.0°F cooler on this date compared to 20-30 years ago.
The last decade has been 9.0°F cooler on this date compared to 20-30 years ago.
Planning for May 9th in Joliet, IL? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Warming Trend
0.3°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 70° | 36° | 53° | — | — |
| 2024 | 80° | 52° | 66° | 1.78" | — |
| 2023 | 70° | 48° | 59° | — | — |
| 2022 | 66° | 47° | 56° | — | — |
| 2021 | 55° | 35° | 45° | 4.57" | — |
| 2020coldest | 47° | 30° | 38° | — | — |
| 2019 | 74° | 45° | 59° | 2.54" | — |
| 2018 | 81° | 52° | 66° | — | — |
| 2017 | 63° | 35° | 49° | 0.76" | — |
| 2016 | 65° | 41° | 53° | 0.13" | — |
| 2015 | 79° | 64° | 71° | 1.88" | — |
| 2014warmest | 89° | 65° | 77° | 2.67" | — |
| 2013 | 80° | 50° | 65° | — | — |
| 2012 | 69° | 49° | 59° | — | — |
| 2011 | 70° | 45° | 57° | — | — |
| 2010 | 50° | 38° | 44° | — | — |
| 2009 | 73° | 53° | 63° | 0.41" | — |
| 2008 | 59° | 45° | 52° | — | — |
| 2007 | 84° | 59° | 72° | 0.18" | — |
| 2006 | 73° | 43° | 58° | — | — |
| 2005 | 85° | 55° | 70° | — | — |
| 2004 | 86° | 50° | 68° | — | — |
| 2003 | 72° | 49° | 60° | 3.56" | — |
| 2002 | 70° | 51° | 60° | 1.65" | — |
| 2001 | 80° | 55° | 68° | — | — |
| 2000 | 84° | 65° | 74° | 1.57" | — |
| 1999 | 57° | 45° | 51° | — | — |
| 1998 | 71° | 53° | 62° | — | — |
| 1997 | 71° | 46° | 59° | — | — |
| 1996 | 70° | 54° | 62° | 0.86" | — |
| 1995 | 65° | 50° | 57° | 2.13" | — |
| 1994 | 66° | 40° | 53° | — | — |
| 1993 | 85° | 62° | 73° | — | — |
| 1992 | 74° | 44° | 59° | — | — |
| 1991 | 76° | 53° | 64° | — | — |
| 1990 | 80° | 60° | 70° | — | — |
| 1989 | 65° | 40° | 52° | 0.15" | — |
| 1988 | 83° | 55° | 69° | 1.17" | — |
| 1987 | 79° | 42° | 60° | — | — |
| 1986 | 77° | 48° | 63° | — | — |
| 1985 | 79° | 53° | 66° | — | — |
| 1984 | 54° | 35° | 44° | — | — |
| 1983 | 53° | 32° | 43° | — | — |
| 1981 | 65° | 43° | 54° | — | — |
| 1980 | 56° | 34° | 45° | — | — |
| 1979 | 87° | 64° | 76° | — | — |
| 1978 | 70° | 46° | 58° | 0.05" | — |
| 1977 | 73° | 37° | 55° | — | — |
| 1976 | 64° | 44° | 54° | — | — |
| 1974 | 52° | 40° | 46° | — | — |
| 1973 | 74° | 50° | 62° | — | — |
| 1972 | 62° | 36° | 49° | 1.07" | — |
| 1971 | 73° | 46° | 60° | 0.71" | — |
53 years of data from JOLIET