Weather on August 26
Naperville, IL
55 Years of Data
Avg High
85°F
Avg Low
62°F
Warmest
1993
83°F avg
Coldest
2025
60°F avg
About This Date
August 26th in Naperville, IL typically brings warm summer weather, with average highs around 85°F and lows near 62°F. Over 54 years of records, the warmest August 26th was in 1993 (83°F average), while the coldest was 2025 (60°F) — a 23°F range across recorded history. Rain or other precipitation has occurred on about 24% of August 26th dates historically, with the wettest August 26th recording 13.94" of rain. The last decade has been 2.3°F cooler on this date compared to 20-30 years ago.
The last decade has been 2.3°F cooler on this date compared to 20-30 years ago.
Planning for August 26th in Naperville, IL? Stay hydrated and seek shade during peak afternoon hours.
Cooling Trend
0.5°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025coldest | 74° | 47° | 60° | — | — |
| 2024 | 90° | 69° | 79° | — | — |
| 2023 | 81° | 65° | 73° | — | — |
| 2022 | 81° | 65° | 73° | 0.56" | — |
| 2021 | 94° | 67° | 80° | 0.23" | — |
| 2020 | 92° | 68° | 80° | — | — |
| 2019 | 78° | 56° | 67° | 0.46" | — |
| 2018 | — | 65° | — | — | — |
| 2017 | 75° | 50° | 63° | — | — |
| 2016 | 85° | 61° | 73° | — | — |
| 2015 | 72° | 51° | 61° | — | — |
| 2014 | 89° | 69° | 79° | 0.03" | — |
| 2013 | 88° | 55° | 71° | — | — |
| 2012 | 95° | 61° | 78° | — | — |
| 2011 | 82° | 54° | 68° | — | — |
| 2010 | 84° | 54° | 69° | — | — |
| 2009 | 74° | 64° | 69° | 4.01" | — |
| 2008 | 74° | 49° | 61° | — | — |
| 2007 | 81° | 56° | 68° | — | — |
| 2006 | 83° | 68° | 75° | — | — |
| 2005 | 84° | 63° | 73° | — | — |
| 2004 | 81° | 67° | 74° | 2.06" | — |
| 2003 | 92° | 73° | 82° | — | — |
| 2002 | 86° | 64° | 75° | — | — |
| 2001 | 88° | 67° | 77° | 2.16" | — |
| 2000 | 87° | 63° | 75° | — | — |
| 1999 | 83° | 60° | 71° | 0.48" | — |
| 1998 | 89° | 59° | 74° | — | — |
| 1997 | 84° | 55° | 70° | — | — |
| 1996 | 85° | 60° | 72° | — | — |
| 1995 | 90° | 68° | 79° | — | — |
| 1994 | 87° | 68° | 78° | — | — |
| 1993warmest | 95° | 72° | 83° | — | — |
| 1992 | 91° | 62° | 77° | 2.77" | — |
| 1991 | 96° | 66° | 81° | — | — |
| 1990 | 86° | 69° | 78° | — | — |
| 1989 | 81° | 64° | 72° | — | — |
| 1988 | 80° | 51° | 66° | — | — |
| 1987 | 67° | 57° | 62° | 6.1" | — |
| 1985 | 80° | 55° | 68° | — | — |
| 1984 | 87° | 56° | 71° | — | — |
| 1983 | 88° | 73° | 80° | 0.38" | — |
| 1982 | 78° | 53° | 66° | — | — |
| 1981 | 82° | 65° | 73° | — | — |
| 1980 | 90° | 60° | 75° | — | — |
| 1979 | 80° | 58° | 69° | — | — |
| 1978 | 84° | 67° | 75° | 0.13" | — |
| 1977 | 84° | 61° | 72° | — | — |
| 1976 | 87° | 66° | 77° | — | — |
| 1975 | 85° | 61° | 73° | — | — |
| 1974 | 91° | 59° | 75° | — | — |
| 1973 | 95° | 69° | 82° | — | — |
| 1972 | 81° | 65° | 73° | 13.94" | — |
| 1971 | 84° | 54° | 69° | — | — |
54 years of data from WHEATON 3 SE