When is the first freeze in San Antonio, TX?
Most years, but not every year, bring a freezing night to San Antonio. NOAA's 1991-2020 climate normals for SAN ANTONIO INTL AP, TX US give a 99.9% chance of a 32°F night in a given year. In years when it does freeze, the middle date for the first freeze is about Nov 28. The middle date for the first hard freeze (28°F or colder) is about Dec 13.
| First fall freeze (32°F), middle date | Nov 28 |
|---|---|
| First hard freeze (28°F), middle date | Dec 13 |
| Last spring freeze (32°F), middle date | Feb 26 |
| Chance of a 32°F night in a year | 99.9% |
| Weather station | SAN ANTONIO INTL AP, TX US (USW00012921) |
The middle date is NOAA's 50% date. In about half of years the first freeze comes sooner, and in half it comes later. One station can differ from nearby areas, mostly low or rural spots. Dates change each year, so check the latest National Weather Service forecast.
For HVAC and plumbing shops in San Antonio
ForecastBooked watches the NWS forecast for the ZIPs you serve. When the first freeze is really in the forecast, a ready-to-send email, text, Google post and social post for your customers appears on your kit page. Pro and up also get a graphic.
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NOAA National Centers for Environmental Information, U.S. Climate Normals 1991-2020, annual/seasonal normals, station USW00012921: fields ANN-TMIN-PRBFST-T32FP50, ANN-TMIN-PRBFST-T28FP50, ANN-TMIN-PRBLST-T32FP50, ANN-TMIN-PRBOCC-LSTH032. https://www.ncei.noaa.gov/data/normals-annualseasonal/1991-2020/access/USW00012921.csv. ForecastBooked is not affiliated with or endorsed by NOAA.