Weather on April 18
Naperville, IL
55 Years of Data
About This Date
April 18th in Naperville, IL typically brings mild spring weather, with average highs around 65°F and lows near 39°F — a 26°F daily swing. Over 56 years of records, the warmest April 18th was in 2002 (75°F average), while the coldest was 1983 (33°F) — a 42°F range across recorded history. Precipitation has occurred on 32% of recorded April 18th dates, with snow falling 2% of the time. The last decade has been 5.4°F cooler on this date compared to 20-30 years ago.
The last decade has been 5.4°F cooler on this date compared to 20-30 years ago.
Planning for April 18th in Naperville, IL? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026 | 81° | 44° | 62° | 1.88" | — |
| 2025 | 62° | 45° | 53° | 0.23" | — |
| 2024 | 66° | 42° | 54° | 0.48" | — |
| 2023 | 37° | 29° | 33° | — | — |
| 2022 | 43° | 32° | 37° | 0.66" | 0.4" |
| 2021 | 57° | 31° | 44° | — | — |
| 2020 | 40° | 32° | 36° | 0.15" | — |
| 2019 | 77° | 49° | 63° | 0.28" | — |
| 2018 | 44° | 24° | 34° | — | — |
| 2017 | 73° | 37° | 55° | — | — |
| 2016 | 81° | 40° | 60° | — | — |
| 2015 | 79° | 47° | 63° | — | — |
| 2014 | 62° | 37° | 50° | — | — |
| 2013 | 54° | 42° | 48° | 14.02" | — |
| 2012 | 59° | 35° | 47° | — | — |
| 2011 | 52° | 33° | 42° | 1.32" | — |
| 2010 | 60° | 28° | 44° | — | — |
| 2009 | 71° | 36° | 53° | — | — |
| 2008 | 75° | 47° | 61° | — | — |
| 2007 | 74° | 39° | 56° | — | — |
| 2006 | 67° | 36° | 51° | 0.03" | — |
| 2005 | 83° | 45° | 64° | — | — |
| 2004 | 86° | 53° | 70° | — | — |
| 2003 | 49° | 39° | 44° | 0.05" | — |
| 2002warmest | 90° | 61° | 75° | — | — |
| 2001 | 58° | 25° | 41° | — | — |
| 2000 | 55° | 40° | 47° | — | — |
| 1999 | 48° | 38° | 43° | 0.2" | — |
| 1998 | 64° | 31° | 47° | — | — |
| 1997 | 57° | 24° | 41° | — | — |
| 1996 | 78° | 52° | 65° | — | — |
| 1995 | 77° | 45° | 61° | 1.6" | — |
| 1994 | 85° | 49° | 67° | — | — |
| 1993 | 65° | 42° | 53° | — | — |
| 1992 | 66° | 41° | 54° | 0.28" | — |
| 1991 | 62° | 37° | 50° | — | — |
| 1990 | 55° | 24° | 40° | — | — |
| 1989 | 44° | 33° | 39° | 0.05" | — |
| 1988 | 62° | 34° | 48° | — | — |
| 1987 | 79° | 43° | 61° | — | — |
| 1986 | 70° | 34° | 52° | — | — |
| 1985 | 84° | 60° | 72° | — | — |
| 1984 | 50° | 39° | 45° | 0.25" | — |
| 1983coldest | 41° | 24° | 33° | — | — |
| 1982 | 65° | 34° | 49° | — | — |
| 1981 | 58° | 44° | 51° | — | — |
| 1980 | 71° | 30° | 51° | — | — |
| 1979 | 63° | 30° | 46° | — | — |
| 1978 | 64° | 41° | 53° | 2.62" | — |
| 1977 | 86° | 50° | 68° | — | — |
| 1976 | 83° | 60° | 71° | — | — |
| 1975 | 74° | 49° | 61° | 4.57" | — |
| 1974 | 67° | 40° | 53° | 0.08" | — |
| 1973 | 68° | 41° | 55° | — | — |
| 1972 | 79° | — | — | — | — |
| 1971 | 66° | 38° | 52° | — | — |
Naperville, IL Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
Naperville, IL Monthly Precipitation
Average rainfall and snowfall per month, in inches.
Naperville, IL Daily Temperature Calendar
Average daily high temperature for every day of the year. Each cell is the climatological mean for that calendar day across 55 years of NOAA data.
Best Time to Visit Naperville, IL
Naperville, IL has no months that meet our "pleasant" threshold — every season has tradeoffs.