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Naperville, IL Weather on May 26
May 26th in Naperville, IL typically brings pleasant spring weather, with average highs around 75°F and lows near 50°F — a 25°F daily swing. Over 55 years of records, the warmest May 26th was in 1985 (78°F average), while the coldest was 1992 (48°F) — a 30°F range across recorded history. Rain or other precipitation has occurred on about 36% of May 26th dates historically, with the wettest May 26th recording 6.12" of rain. The last decade has been 7.5°F warmer on this date compared to 20-30 years ago.
What to Expect on May 26
Planning for May 26th in Naperville, IL? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
May 26 Weather Records for Naperville
- •The all-time record high for May 26th in Naperville, IL is 92°F, set in 1985.
- •The coldest May 26th on record dropped to 34°F in 1983.
- •Temperatures have reached 90°F or higher on May 26th in 2 of the last 55 years.
- •Last year (1971), May 26th was 22°F cooler than the long-term average.
Frequently Asked Questions
What was the warmest May 26 ever in Naperville?
The warmest May 26 in Naperville, IL reached 92°F in 1985. That is 17°F above the long-term average high of 75°F.
What was the coldest May 26 ever in Naperville?
The coldest May 26 in Naperville, IL dropped to 34°F in 1983. That is 16°F below the long-term average low of 50°F.
What is the average temperature on May 26 in Naperville?
On May 26, Naperville averages a high of 75°F and a low of 50°F based on 55 years of NOAA weather observations from WHEATON 3 SE.
How many years of weather data are available for May 26 in Naperville?
We have 55 years of weather records for May 26 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.
May 26 Weather History in Naperville
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 68°F | 45°F | 0.03" | -- |
| 2024 | 76°F | 50°F | 0" | -- |
| 2023 | 63°F | 36°F | 0" | -- |
| 2022 | 77°F | 56°F | 1.12" | -- |
| 2021 | 81°F | 53°F | 1.8" | -- |
| 2020 | 89°F | -- | 0" | -- |
| 2019 | 82°F | 66°F | 0" | -- |
| 2018 | 90°F | 67°F | 0" | -- |
| 2017 | 71°F | 49°F | 0" | -- |
| 2016 | 89°F | 64°F | 3.33" | -- |
| 2015 | 80°F | 66°F | 0.66" | -- |
| 2014 | 84°F | 51°F | 0" | -- |
| 2013 | 59°F | 41°F | 0" | -- |
| 2012 | 79°F | 62°F | 0" | -- |
| 2011 | 74°F | 45°F | 6.12" | -- |
| 2010 | 89°F | 61°F | 1.96" | -- |
| 2009 | 65°F | 55°F | 0.53" | -- |
| 2008 | 77°F | 58°F | 2.74" | -- |
| 2007 | 73°F | 47°F | 0.71" | -- |
| 2006 | 80°F | 63°F | 0.3" | -- |
| 2005 | 76°F | 54°F | 0" | -- |
| 2004 | 69°F | 46°F | 0" | -- |
| 2003 | 74°F | 41°F | 0" | -- |
| 2002 | 76°F | 37°F | 0" | -- |
| 2001 | 59°F | 37°F | 2.16" | -- |
| 2000 | 78°F | 48°F | 0" | -- |
| 1999 | 75°F | 49°F | 0" | -- |
| 1998 | 82°F | 45°F | 0" | -- |
| 1997 | 64°F | 45°F | 0" | -- |
| 1996 | 65°F | 46°F | 0.2" | -- |
| 1995 | 70°F | 42°F | 0.03" | -- |
| 1994 | 76°F | 48°F | 0.38" | -- |
| 1993 | 80°F | 41°F | 0" | -- |
| 1992 | 54°F | 43°F | 0" | -- |
| 1991 | 83°F | 61°F | 2.79" | -- |
| 1990 | 67°F | 55°F | 1.85" | -- |
| 1989 | 74°F | 43°F | 0.13" | -- |
| 1988 | 78°F | 39°F | 0" | -- |
| 1987 | 86°F | 62°F | 0" | -- |
| 1986 | 69°F | 54°F | 0" | -- |
| 1985 | 92°F | 64°F | 0" | -- |
| 1984 | 68°F | 58°F | 1.14" | -- |
| 1983 | 67°F | 34°F | 0" | -- |
| 1982 | 68°F | 53°F | 0.71" | -- |
| 1981 | 80°F | 54°F | 0" | -- |
| 1980 | 75°F | 45°F | 0" | -- |
| 1979 | 70°F | 36°F | 0" | -- |
| 1978 | 89°F | 63°F | 0" | -- |
| 1977 | 88°F | 57°F | 0" | -- |
| 1976 | 74°F | 36°F | 0" | -- |
| 1975 | 79°F | 60°F | 0" | -- |
| 1974 | 70°F | 47°F | 0" | -- |
| 1973 | 72°F | 42°F | 0" | -- |
| 1972 | 86°F | 54°F | 0" | -- |
| 1971 | 53°F | 45°F | 0" | -- |
Based on 55 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.