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Weather extremes

How extreme does Austin's weather get?

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

Based on 21 years of daily weather observations (2005–present), from the Austin Great Hills station 17 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 Austin has recorded — each shown against what a normal day that time of year looks like.

🔥 Hottest day
110°F Aug 30, 2011

That is about 14°F hotter than a normal August afternoon in Austin (typical high near 96°F).

The three most extreme on record

1 110°F Aug 30, 2011
2 110°F Aug 28, 2023
3 109°F Aug 29, 2011
❄️ Coldest night
4°F Feb 16, 2021

About 37°F colder than a normal February night in Austin (typical low near 41°F).

The three most extreme on record

1 4°F Feb 16, 2021recent
2 4°F Feb 17, 2021
3 6°F Feb 15, 2021
🌧️ Most rain in one day
10.14 in Sep 8, 2010

More rain in a single day than Austin usually gets in the whole month of September (typical September total about 3.4 in).

The three most extreme on record

1 10.14 in Sep 8, 2010
2 8.78 in Oct 31, 2013
3 5.93 in Oct 25, 2015
Most snow in one day
5.8 in Feb 15, 2021

The three most extreme on record

1 5.8 in Feb 15, 2021recent
2 2.4 in Jan 11, 2021
3 1.1 in Feb 24, 2010

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.

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

Austin's record heat sits well above even a hot day for the season — August's 110°F is about 14°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, Austin's warmest days reach the mid-90s°F and its coldest nights drop to the high 30s°F. But across the record it has gone as high as 110°F and as low as 4°F. A single day has delivered over 10 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 San Marcos (NOAA GHCN station USC00417983), about 47 km from the city centre.

How we build these numbers →