Weather on May 27
Naperville, IL
55 Years of Data
Avg High
76°F
Avg Low
50°F
Warmest
1987
80°F avg
Coldest
2011
46°F avg
About This Date
May 27th in Naperville, IL typically brings pleasant spring weather, with average highs around 76°F and lows near 50°F — a 26°F daily swing. Over 55 years of records, the warmest May 27th was in 1987 (80°F average), while the coldest was 2011 (46°F) — a 34°F range across recorded history. Rain or other precipitation has occurred on about 38% of May 27th dates historically, with the wettest May 27th recording 3.71" 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 May 27th in Naperville, IL? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Warming Trend
0.5°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 68° | 55° | 62° | — | — |
| 2024 | 72° | 52° | 62° | 3.05" | — |
| 2023 | 71° | 37° | 54° | — | — |
| 2022 | 75° | 53° | 64° | 1.19" | — |
| 2021 | 81° | 53° | 67° | — | — |
| 2020 | 87° | 66° | 77° | — | — |
| 2019 | 76° | 49° | 62° | 0.08" | — |
| 2018 | 91° | 62° | 77° | — | — |
| 2017 | 71° | 51° | 61° | 1.45" | — |
| 2016 | — | 64° | — | 0.05" | — |
| 2015 | 76° | 63° | 69° | 1.35" | — |
| 2014 | 88° | 66° | 77° | 0.2" | — |
| 2013 | 66° | 47° | 56° | 0.23" | — |
| 2012 | 85° | 61° | 73° | — | — |
| 2011coldest | 52° | 40° | 46° | 0.13" | — |
| 2010 | 78° | 49° | 63° | — | — |
| 2009 | 79° | 57° | 68° | 3.2" | — |
| 2008 | 82° | 42° | 62° | — | — |
| 2007 | 66° | 49° | 57° | 1.35" | — |
| 2006 | 85° | 56° | 70° | — | — |
| 2005 | 75° | 46° | 61° | — | — |
| 2004 | 78° | 46° | 62° | — | — |
| 2003 | 75° | 43° | 59° | — | — |
| 2002 | 80° | 48° | 64° | — | — |
| 2001 | 65° | 47° | 56° | 2.29" | — |
| 2000 | 70° | 54° | 62° | 0.43" | — |
| 1999 | 83° | 41° | 62° | — | — |
| 1998 | 86° | 48° | 67° | — | — |
| 1997 | 70° | 44° | 57° | — | — |
| 1996 | 60° | 48° | 54° | 1.3" | — |
| 1995 | 70° | 52° | 61° | 0.2" | — |
| 1994 | 69° | 33° | 51° | 0.05" | — |
| 1993 | 80° | 51° | 66° | — | — |
| 1992 | 67° | 29° | 48° | — | — |
| 1991 | 90° | 65° | 77° | 3.07" | — |
| 1990 | 77° | 54° | 65° | — | — |
| 1989 | 76° | 40° | 58° | — | — |
| 1988 | 83° | 51° | 67° | — | — |
| 1987warmest | 90° | 70° | 80° | — | — |
| 1986 | 71° | 55° | 63° | 0.81" | — |
| 1985 | 72° | 52° | 62° | 1.27" | — |
| 1984 | 68° | 44° | 56° | — | — |
| 1983 | 70° | 38° | 54° | — | — |
| 1982 | 74° | 59° | 66° | — | — |
| 1981 | 74° | 56° | 65° | — | — |
| 1980 | 85° | 41° | 63° | — | — |
| 1979 | 70° | 40° | 55° | — | — |
| 1978 | 90° | 64° | 77° | — | — |
| 1977 | 84° | 51° | 68° | — | — |
| 1976 | 78° | 42° | 60° | — | — |
| 1975 | 75° | 50° | 63° | 0.28" | — |
| 1974 | 73° | 38° | 55° | — | — |
| 1973 | 68° | 55° | 62° | 3.71" | — |
| 1972 | 90° | 54° | 72° | — | — |
| 1971 | 68° | 32° | 50° | — | — |
55 years of data from LISLE - MORTON ARBORETUM