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Naperville, IL Weather on August 25
August 25th in Naperville, IL typically brings warm summer weather, with average highs around 84°F and lows near 61°F. Over 54 years of records, the warmest August 25th was in 1991 (83°F average), while the coldest was 1977 (61°F) — a 22°F range across recorded history. Rain or other precipitation has occurred on about 30% of August 25th dates historically, with the wettest August 25th recording 2.35" of rain. Temperatures on this date have remained relatively stable over the past several decades.
What to Expect on August 25
Planning for August 25th in Naperville, IL? Stay hydrated and seek shade during peak afternoon hours. Consider bringing rain gear or an umbrella.
August 25 Weather Records for Naperville
- •The all-time record high for August 25th in Naperville, IL is 98°F, set in 1991.
- •The coldest August 25th on record dropped to 44°F in 1977.
- •Temperatures have reached 90°F or higher on August 25th in 13 of the last 54 years.
- •Last year (1971), August 25th was 6°F warmer than the long-term average.
Frequently Asked Questions
What was the warmest August 25 ever in Naperville?
The warmest August 25 in Naperville, IL reached 98°F in 1991. That is 14°F above the long-term average high of 84°F.
What was the coldest August 25 ever in Naperville?
The coldest August 25 in Naperville, IL dropped to 44°F in 1977. That is 17°F below the long-term average low of 61°F.
What is the average temperature on August 25 in Naperville?
On August 25, Naperville averages a high of 84°F and a low of 61°F based on 54 years of NOAA weather observations from WHEATON 3 SE.
How many years of weather data are available for August 25 in Naperville?
We have 54 years of weather records for August 25 in Naperville, IL, sourced from NOAA's Global Historical Climatology Network. Records include daily high and low temperatures, precipitation, and snowfall data going back to 2025.
August 25 Weather History in Naperville
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 74°F | 52°F | 0" | -- |
| 2024 | 90°F | 66°F | 0" | -- |
| 2023 | 97°F | 68°F | 0" | -- |
| 2022 | 85°F | 61°F | 0.17" | -- |
| 2021 | 94°F | 70°F | 0.16" | -- |
| 2020 | 94°F | 62°F | 0" | -- |
| 2019 | 74°F | 53°F | 0" | -- |
| 2018 | 72°F | 61°F | 0.25" | -- |
| 2017 | 76°F | 46°F | 0" | -- |
| 2016 | 84°F | 70°F | 0.46" | -- |
| 2015 | 73°F | 55°F | 0" | -- |
| 2014 | 89°F | 70°F | 0.02" | -- |
| 2013 | 85°F | 54°F | 0" | -- |
| 2012 | 94°F | 60°F | 0" | -- |
| 2011 | 92°F | 61°F | 0" | -- |
| 2010 | 84°F | 57°F | 0" | -- |
| 2009 | 82°F | 55°F | 0.46" | -- |
| 2008 | 74°F | 52°F | 0" | -- |
| 2007 | 81°F | 64°F | 0.2" | -- |
| 2006 | 83°F | 66°F | 0.02" | -- |
| 2005 | 81°F | 61°F | 0" | -- |
| 2004 | 78°F | 66°F | 0.87" | -- |
| 2003 | 93°F | 70°F | 0" | -- |
| 2002 | 85°F | 61°F | 0" | -- |
| 2001 | 82°F | 69°F | 0.42" | -- |
| 2000 | 88°F | 56°F | 0" | -- |
| 1999 | 73°F | 65°F | 1.19" | -- |
| 1998 | 87°F | 69°F | 0.56" | -- |
| 1997 | 82°F | 60°F | 0" | -- |
| 1996 | 86°F | 51°F | 0" | -- |
| 1995 | 90°F | 70°F | 0" | -- |
| 1994 | 89°F | 65°F | 0" | -- |
| 1993 | 92°F | 65°F | 0" | -- |
| 1992 | 92°F | 68°F | 0" | -- |
| 1991 | 98°F | 68°F | 0" | -- |
| 1990 | 86°F | 67°F | 0" | -- |
| 1989 | 80°F | 61°F | 0" | -- |
| 1988 | 82°F | 58°F | 0" | -- |
| 1987 | 73°F | 56°F | 0" | -- |
| 1985 | 82°F | 55°F | 0.32" | -- |
| 1984 | 81°F | 53°F | 0" | -- |
| 1983 | 89°F | 68°F | 0" | -- |
| 1982 | 79°F | 54°F | 0.05" | -- |
| 1981 | 85°F | 60°F | 0.46" | -- |
| 1980 | 86°F | 54°F | 0" | -- |
| 1979 | 81°F | 54°F | 0" | -- |
| 1978 | 83°F | 67°F | 0" | -- |
| 1977 | 79°F | 44°F | 0" | -- |
| 1976 | 85°F | 63°F | 0" | -- |
| 1975 | 91°F | 67°F | 0" | -- |
| 1974 | 81°F | 49°F | 0" | -- |
| 1973 | 87°F | 63°F | 0" | -- |
| 1972 | 83°F | 62°F | 0" | -- |
| 1971 | 90°F | 57°F | 2.35" | -- |
Based on 54 years of data from NOAA station: WHEATON 3 SE
Monthly Climate Averages
Historical temperature and precipitation averages for Naperville, IL, based on 55+ years of weather data.
Temperatures in Fahrenheit. Precipitation and snowfall in inches.