How extreme does Harker Heights's weather get?

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

Based on 48 years of daily weather observations (1978–present), from the Killeen station 4 km away. Updated through April 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 Harker Heights has recorded — each shown against what a normal day that time of year looks like.

🔥 Hottest day

112°F Sep 4, 2000

That is about 22°F hotter than a normal September afternoon in Harker Heights (typical high near 90°F).

The three most extreme on record

1 112°F Sep 4, 2000

2 112°F Sep 6, 2000

3 111°F Sep 2, 2000

❄️ Coldest night

-11°F May 25, 1987

About 74°F colder than a normal May night in Harker Heights (typical low near 63°F).

The three most extreme on record

1 -11°F May 25, 1987

2 -6°F Feb 28, 1987

3 -2°F Dec 23, 1989

🌧️ Most rain in one day

11.13 in Sep 8, 2010

More rain in a single day than Harker Heights usually gets in the whole month of September (typical September total about 3.9 in).

The three most extreme on record

1 11.13 in Sep 8, 2010

2 5.63 in Oct 18, 1998

3 4.95 in Mar 31, 1993

⛄ Most snow in one day

1.0 in Feb 7, 1988

The three most extreme on record

1 1.0 in Feb 7, 1988

2 0.2 in Jan 2, 1985

3 0.2 in Jan 13, 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.

normal range of daily temperatureshottest ever recordedcoldest ever recorded

Harker Heights's record heat sits well above even a hot day for the season — September's 112°F is about 22°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, Harker Heights's warmest days reach the high 90s°F and its coldest nights drop to the mid-30s°F. But across the record it has gone as high as 112°F and as low as −11°F. A single day has delivered over 11 inches of rain or close to 1 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 Killeen (NOAA GHCN station USC00414792), about 4 km from the city centre.

How we build these numbers →

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