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Weather extremes

How extreme does Stephenville's weather get?

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

Based on 50+ years of daily weather observations (1974–present), from the Stephenville Clark Fld station 2 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 Stephenville has recorded — each shown against what a normal day that time of year looks like.

🔥 Hottest day
110°F Aug 17, 2023

That is about 12°F hotter than a normal August afternoon in Stephenville (typical high near 98°F).

The three most extreme on record

1 110°F Aug 17, 2023recent
2 109°F Jun 28, 1980
3 109°F Sep 5, 2000
❄️ Coldest night
-8°F Dec 23, 1989

About 41°F colder than a normal December night in Stephenville (typical low near 33°F).

The three most extreme on record

1 -8°F Dec 23, 1989
2 -1°F Dec 22, 1989
3 0°F Feb 16, 2021
🌧️ Most rain in one day
6.47 in Aug 1, 1995

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

The three most extreme on record

1 6.47 in Aug 1, 1995
2 5.35 in Jun 13, 1989
3 5.11 in Sep 8, 2010
Most snow in one day
6.0 in Dec 11, 1986

Close to a whole typical December's snow in one day (Stephenville averages about 0 in across the month).

The three most extreme on record

1 6.0 in Dec 11, 1986
2 4.0 in Jan 22, 1978
3 4.0 in Jan 1, 1985

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.

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

Stephenville's record heat sits well above even a hot day for the season — August's 110°F is about 12°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, Stephenville's warmest days reach the high 90s°F and its coldest nights drop to the low 30s°F. But across the record it has gone as high as 110°F and as low as −8°F. A single day has delivered over 6 inches of rain or close to 6 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 Stephenville Clark Fld (NOAA GHCN station USW00003969), about 2 km from the city centre.

How we build these numbers →