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Weather extremes
How extreme does Collinsville's weather get?
The hottest, coldest, wettest and snowiest days Collinsville 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 Collinsville has recorded — each shown against what a normal day that time of year looks like.
That is about 19°F hotter than a normal June afternoon in Collinsville (typical high near 87°F).
The three most extreme on record
About 51°F colder than a normal January night in Collinsville (typical low near 24°F).
The three most extreme on record
About 93% of a typical April's rain in a single day (Collinsville averages roughly 4.9 in across the month).
The three most extreme on record
Close to a whole typical January's snow in one day (Collinsville averages about 3 in across the month).
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.
Collinsville's record heat sits well above even a hot day for the season — June's 106°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
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from NOAA's U.S. Climate Normals, measured at ST Charles 7 Ssw (NOAA GHCN station USC00237398), about 47 km from the city centre.