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Weather extremes
How extreme does Mason City's weather get?
The hottest, coldest, wettest and snowiest days Mason City 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 Mason City has recorded — each shown against what a normal day that time of year looks like.
That is about 21°F hotter than a normal June afternoon in Mason City (typical high near 81°F).
The three most extreme on record
About 45°F colder than a normal February night in Mason City (typical low near 13°F).
The three most extreme on record
More rain in a single day than Mason City usually gets in the whole month of August (typical August total about 4.0 in).
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.
Mason City's record heat sits well above even a hot day for the season — June's 102°F is about 21°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 30 years of daily observations at Mason City Municipal Arpt, a weather station, about 10 km from the city centre. The underlying daily records come from NOAA's global station network.