Winter Storm Warnings in San Antonio, Texas
San Antonio sits at the southern edge of America's winter weather map, where snow is genuinely rare rather than merely infrequent. Across the 13 years analyzed from 2012 through 2024, the city averaged just 0.4 inches (1.1 cm) of snowfall per year — a figure so modest it barely registers on a ruler. February stands out as the snowiest month on the calendar, though that distinction is relative: measurable accumulation in any given February is far from guaranteed. Days meeting the threshold for heavy or major snowfall averaged out to zero per year across the entire study period.
Average winter overnight lows sit around 46°F (7.9°C), meaning freezing temperatures themselves are noteworthy events here, let alone significant snowfall.
When the National Weather Service does issue a winter storm warning for San Antonio, it signals conditions genuinely dangerous for a region unaccustomed to them — roads that ice quickly on bridges and overpasses, drivers with little experience on slick surfaces, and infrastructure not designed for sustained cold. It is worth knowing that warning thresholds are not uniform across the country. The snowfall amounts that trigger a warning in San Antonio would not necessarily meet the bar in Minneapolis or Denver. A warning here reflects what is dangerous for this city, not a national standard.
| Years analyzed | 13 winters (2012–2024) |
|---|---|
| Avg. annual snowfall | 0.4 in (1.1 cm) |
| Snowiest months | February |
| Avg. winter overnight low | 46.2°F (7.9°C) |
| Heavy-snow days per year | 0 |
Climatology figures are approximate estimates for the period shown and may differ from official local records.
Watch vs warning: a winter storm watch means a major storm is possible in San Antonio within 12–48 hours (be prepared); a winter storm warning means it is happening or about to (take action now). For full definitions, see the complete winter storm warning guide.
San Antonio winter storm FAQ
Is there a winter storm warning in San Antonio right now?
The live status at the top of this page shows whether a winter storm warning, watch, or advisory is currently in effect for San Antonio, Texas. It checks live forecast and alert data automatically and refreshes every time the page loads.
Does San Antonio get winter storm warnings often?
San Antonio rarely sees measurable snow, so winter storm warnings are uncommon; even a light snow or ice event can be highly disruptive here. The frequency varies year to year with the track of major storm systems.
How much snow triggers a winter storm warning in San Antonio?
There is no single national trigger: warning criteria are set by each local National Weather Service office, ranging from a couple of inches of snow in areas where snow is rare up to 6 inches or more in snow-belt regions, and significant ice accumulation can warrant a warning on its own. In a lower-snow area like San Antonio, warnings can be issued for amounts snowier regions would shrug off.
What should I do during a winter storm warning in San Antonio?
Avoid travel if possible, stay indoors and keep warm, prepare for power outages, keep an emergency kit, and check on elderly or vulnerable neighbours. Follow guidance from Texas authorities and the National Weather Service (NWS).
Winter storm warnings in nearby locations
- Winter storm warning in Austin, TX
- Winter storm warning in Houston, TX
- Winter storm warning in Fort Worth, TX
- Winter storm warning in Dallas, TX
- Winter storm warning in Lubbock, TX
- Winter storm warning in Shreveport, LA
See all locations, read the latest winter weather news, or the full winter storm warning guide. Definitions follow the National Weather Service (NWS) criteria; thresholds vary by region.