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Weather extremes
How extreme does Naperville's weather get?
The hottest, coldest, wettest and snowiest days Naperville has recorded — the outer limits of what its weather can do, and how far they sit beyond a normal day.
The four kinds of extreme
The hottest, coldest, wettest and snowiest single days Naperville has recorded — each shown against what a normal day that time of year looks like.
That is about 18°F hotter than a normal July afternoon in Naperville (typical high near 84°F).
The three most extreme on record
About 38°F colder than a normal January night in Naperville (typical low near 15°F).
The three most extreme on record
More rain in a single day than Naperville usually gets in the whole month of April (typical April total about 3.8 in).
The three most extreme on record
The three most extreme on record
How hot and cold it gets, month by month
The shaded band is the normal range of daily temperatures for each month. The dots show the most extreme it has ever been — so you can see how far beyond a normal day the records really sit.
Naperville's record heat sits well above even a hot day for the season — July's 102°F is about 18°F beyond a normal hot afternoon. Its record cold is just as far below a normal winter night — the dots mark how rare each extreme really is.
In plain terms
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from NOAA's U.S. Climate Normals, measured at Aurora Water (NOAA GHCN station USC00110338), about 13 km from the city centre.