San Antonio, TX weather
Right now 77°, cloudy · tonight 72°, cloudy · seven days from the National Weather Service
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Right now · 77° · cloudy · wind NNE 10 mph · 2° warmer than this time yesterday · at San Antonio - Kelly, 10:36 PM
Today, in the Weather Service’s words
Mostly cloudy, with a low around 72. North northeast wind 10 to 15 mph, with gusts as high as 25 mph.
Seven days
Winter in San Antonio
San Antonio sees essentially no snow in an average year, according to NOAA’s 1991-2020 climate normals - a essentially snowless place. Measurable snow is close to unheard of. On the rare occasion it falls, everything stops.
That is why local snowfall thresholds differ so much from one town to the next: a district that plans for 0 inches a year is equipped differently from one that never sees any. Here, roughly 0.5 inches in a single storm is where a normal school day comes under threat.
Upper air over San Antonio
The nearest radiosonde launch is Corpus Christi, about 129 miles away. A weather balloon goes up twice a day and measures temperature, humidity and wind all the way through the atmosphere - which is what forecasters actually read to judge whether storms will fire, and how a surface forecast was arrived at.
Sources: National Weather Service forecast and hourly grid for San Antonio (api.weather.gov), updated Sun, 11:44 PM UTC. Sunrise and sunset from NOAA’s solar position calculations. Snowfall normals from NOAA’s 1991-2020 US Climate Normals. County lines from the US Census Bureau.