San Antonio, TX All-Time Weather Extremes
The most extreme temperature, precipitation, and snowfall ever recorded in San Antonio, from NOAA daily weather observations.
| Temperature | ||
|---|---|---|
| Record High | 111°F (44°C) | September 5, 2000 |
| Record Low | 0°F (-18°C) | January 31, 1949 |
| Lowest High | 23°F (-5°C) | January 30, 1951 and December 22, 1989 |
| Highest Low | 82°F (28°C) | August 5, 1980 and August 11, 2011 and August 28, 2011 |
| Highest Mean | 96.0°F (36°C) | August 28, 2011 |
| Lowest Mean | 16.5°F (-9°C) | January 30, 1949 |
| Precipitation | ||
| Max in One Calendar Day | 11.26" (286.0 mm) | October 17, 1998 |
| Max in One Month | 18.07" (459.0 mm) | October 1998 |
| Least in One Month | 0.00" (0.0 mm) | August 1952 |
| Max in One Year | 52.31" (1328.8 mm) | 1973 |
| Least in One Year | 11.54" (293.1 mm) | 2022 |
| Snowfall | ||
| Max in One Calendar Day | 13.2" (33.5 cm) | January 12, 1985 |
| Max in One Month | 15.9" (40.4 cm) | January 1985 |
| Max in One Season | 15.9" (40.4 cm) | 1984-85 |
| Max in One Year | 15.9" (40.4 cm) | 1985 |
| Earliest Snow | 0.3" (0.8 cm) | November 23, 1957 |
| Earliest Measurable Snow | 0.3" (0.8 cm) | November 23, 1957 |
| Latest Snow | 0.1" (0.3 cm) | February 25, 2003 |
| Latest Measurable Snow | 0.1" (0.3 cm) | February 25, 2003 |
| Period of Record | ||
| Temperature | September 1, 1946 – February 6, 2025 | |
| Precipitation | September 1, 1946 – February 6, 2025 | |
| Snowfall | September 1, 1946 – February 6, 2025 | |
Note: Records compiled from NOAA GHCN-Daily observations at SAN ANTONIO INTL AP (6 mi from San Antonio, TX). Quality-flagged readings are excluded. Monthly and annual totals require substantially complete reporting for “least” records.
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Frequently Asked Questions
What is the hottest temperature ever recorded in San Antonio, TX?
The all-time record high in San Antonio, TX is 111°F (44°C), set on September 5, 2000.
What is the coldest temperature ever recorded in San Antonio, TX?
The all-time record low in San Antonio, TX is 0°F (-18°C), set on January 31, 1949.
What is the most rain San Antonio, TX has ever had in one day?
The most precipitation recorded in one calendar day near San Antonio, TX is 11.26 inches, on October 17, 1998.
What is the biggest snowfall ever recorded in San Antonio, TX?
The most snow recorded in one calendar day near San Antonio, TX is 13.2 inches, on January 12, 1985.
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