How extreme does Mason's weather get?

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

Based on 29 years of daily weather observations (1997–present), from the Dayton Wright Brothers Ap station 27 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 Mason has recorded — each shown against what a normal day that time of year looks like.

🔥 Hottest day

102°F Jul 7, 2012

That is about 16°F hotter than a normal July afternoon in Mason (typical high near 86°F).

The three most extreme on record

1 102°F Jul 7, 2012

2 100°F Jun 28, 2012

3 100°F Jul 6, 2012

❄️ Coldest night

-11°F Jan 27, 2003

About 33°F colder than a normal January night in Mason (typical low near 22°F).

The three most extreme on record

1 -11°F Jan 27, 2003

2 -10°F Dec 25, 2004

3 -10°F Jan 2, 2018

🌧️ Most rain in one day

3.80 in Sep 27, 2002

More rain in a single day than Mason usually gets in the whole month of September (typical September total about 3.0 in).

The three most extreme on record

1 3.80 in Sep 27, 2002

2 3.77 in Jul 27, 2002

3 3.16 in Sep 26, 2011

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

Mason's record heat sits well above even a hot day for the season — July's 102°F is about 16°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, Mason's warmest days reach the mid-80s°F and its coldest nights drop to the low 20s°F. But across the record it has gone as high as 102°F and as low as −11°F. A single day has delivered over 4 inches of rain. 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 Dayton Mcd (NOAA GHCN station USC00332067), about 48 km from the city centre.

How we build these numbers →

← Mason city detail