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Weather extremes

How extreme does Lake in the Hills's weather get?

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

Based on 35 years of daily weather observations (1991–present), from the Crystal Lake 4Nw station 10 km away. Updated through June 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 Lake in the Hills has recorded — each shown against what a normal day that time of year looks like.

🔥 Hottest day
103°F Jul 6, 2012

That is about 19°F hotter than a normal July afternoon in Lake in the Hills (typical high near 84°F).

The three most extreme on record

1 103°F Jul 6, 2012
2 102°F Jul 5, 2012
3 102°F Jul 7, 2012
❄️ Coldest night
-29°F Feb 1, 2019

About 45°F colder than a normal February night in Lake in the Hills (typical low near 16°F).

The three most extreme on record

1 -29°F Feb 1, 2019
2 -28°F Jan 31, 2019
3 -24°F Jan 30, 2019
🌧️ Most rain in one day
5.04 in Aug 22, 2002

More rain in a single day than Lake in the Hills usually gets in the whole month of August (typical August total about 3.8 in).

The three most extreme on record

1 5.04 in Aug 22, 2002
2 4.50 in Jun 26, 2013
3 4.49 in Aug 10, 2021
Most snow in one day
14.0 in Feb 1, 2015

Close to a whole typical February's snow in one day (Lake in the Hills averages about 9 in across the month).

The three most extreme on record

1 14.0 in Feb 1, 2015
2 12.9 in Feb 2, 2011
3 12.6 in Dec 6, 2015

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.

-50°-30°-10°10°30°50°70°90°110°130° all-time high 103°F JanFebMarAprMayJunJulAugSepOctNovDec
normal range of daily temperatureshottest ever recordedcoldest ever recorded

Lake in the Hills's record heat sits well above even a hot day for the season — July's 103°F is about 19°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, Lake in the Hills's warmest days reach the mid-80s°F and its coldest nights drop to the mid-10s°F. But across the record it has gone as high as 103°F and as low as −29°F. A single day has delivered over 5 inches of rain or close to 14 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 Crystal Lake 4nw (NOAA GHCN station USC00112048), about 10 km from the city centre.

How we build these numbers →