How extreme does Bloomingdale's weather get?

The hottest, coldest, wettest and snowiest days Bloomingdale has recorded — the outer limits of what its weather can do, and how far they sit beyond a normal day.

Based on 50+ years of daily weather observations (1971–present), from the Chicago Ohare Intl Ap station 12 km away. Updated through May 2026 — an all-time extreme only changes when a more extreme day actually occurs, so some dates are old. That is normal, not stale data.

The four kinds of extreme

The hottest, coldest, wettest and snowiest single days Bloomingdale has recorded — each shown against what a normal day that time of year looks like.

🔥 Hottest day

104°F Jun 20, 1988

That is about 24°F hotter than a normal June afternoon in Bloomingdale (typical high near 80°F).

The three most extreme on record

1 104°F Jun 20, 1988

2 104°F Jul 13, 1995

3 103°F Jun 25, 1988

❄️ Coldest night

-27°F Jan 20, 1985

About 46°F colder than a normal January night in Bloomingdale (typical low near 19°F).

The three most extreme on record

1 -27°F Jan 20, 1985

2 -26°F Jan 10, 1982

3 -25°F Jan 16, 1982

🌧️ Most rain in one day

6.86 in Jul 23, 2011

More rain in a single day than Bloomingdale usually gets in the whole month of July (typical July total about 3.7 in).

The three most extreme on record

1 6.86 in Jul 23, 2011

2 6.64 in Sep 13, 2008

3 6.49 in Aug 14, 1987

⛄ Most snow in one day

18.6 in Jan 2, 1999

Close to a whole typical January's snow in one day (Bloomingdale averages about 11 in across the month).

The three most extreme on record

1 18.6 in Jan 2, 1999

2 16.2 in Feb 1, 2015

3 15.3 in Jan 13, 1979

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.

normal range of daily temperatureshottest ever recordedcoldest ever recorded

Bloomingdale's record heat sits well above even a hot day for the season — June's 104°F is about 24°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

In a normal year, Bloomingdale's warmest days reach the mid-80s°F and its coldest nights drop to the high 10s°F. But across the record it has gone as high as 104°F and as low as −27°F. A single day has delivered over 7 inches of rain or close to 19 inches of snow. Those are the outer edges worth knowing if you are moving here, planning a trip, or thinking about a house.

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 27 km from the city centre.

How we build these numbers →

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