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Weather extremes

How extreme does Flower Mound's weather get?

The hottest, coldest, wettest and snowiest days Flower Mound 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 (1971–present), from the Grapevine Dam station 8 km away. Updated through March 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 Flower Mound has recorded — each shown against what a normal day that time of year looks like.

🔥 Hottest day
110°F Jul 13, 1998

That is about 15°F hotter than a normal July afternoon in Flower Mound (typical high near 95°F).

The three most extreme on record

1 110°F Jul 13, 1998
2 110°F Aug 3, 2011
3 110°F Aug 4, 2011
❄️ Coldest night
-1°F Dec 23, 1989

About 37°F colder than a normal December night in Flower Mound (typical low near 36°F).

The three most extreme on record

1 -1°F Dec 23, 1989
2 0°F Mar 1, 2004
3 0°F Mar 2, 2004
🌧️ Most rain in one day
8.30 in Jun 14, 1989

More rain in a single day than Flower Mound usually gets in the whole month of June (typical June total about 3.8 in).

The three most extreme on record

1 8.30 in Jun 14, 1989
2 7.50 in Jul 29, 2004
3 6.47 in May 17, 1989
Most snow in one day
3.1 in Dec 16, 1983

The three most extreme on record

1 3.1 in Dec 16, 1983
2 1.0 in Feb 2, 1996
3 0.8 in Nov 13, 1976

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

Flower Mound's record heat sits well above even a hot day for the season — July's 110°F is about 15°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, Flower Mound's warmest days reach the mid-90s°F and its coldest nights drop to the mid-30s°F. But across the record it has gone as high as 110°F and as low as −1°F. A single day has delivered over 8 inches of rain or close to 3 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 Dal-ftw Wscmo AP (NOAA GHCN station USW00003927), about 15 km from the city centre.

How we build these numbers →