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Weather extremes
How extreme does Calgary's weather get?
The hottest, coldest, wettest and snowiest days Calgary 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 Calgary has recorded — each shown against what a normal day that time of year looks like.
That is about 28°F hotter than a normal August afternoon in Calgary (typical high near 71°F).
The three most extreme on record
About 53°F colder than a normal January night in Calgary (typical low near 11°F).
The three most extreme on record
About 64% of a typical June's rain in a single day (Calgary averages roughly 4.1 in across the month).
The three most extreme on record
About 34% of a typical February's snow in a single day (Calgary averages roughly 8 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.
Calgary's record heat sits well above even a hot day for the season — August's 99°F is about 28°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 — 1991–2020 normals computed from 21 years of daily observations at Calgary Int'l A, a weather station, about 8 km from the city centre. The underlying daily records come from NOAA's global station network.