You’ve probably heard the old joke about San Antonio: if you don’t like the weather, just wait five minutes. Well, looking at the San Antonio 2 week forecast, that isn't just a cliché; it’s literally the survival guide for the rest of January 2026.
Honestly, we’re about to see a massive swing from "light jacket weather" to "where did I put my heavy coat?" followed by a very soggy end to the month. If you’re planning a trip to the River Walk or just trying to figure out if you need to cover your hibiscus plants, listen up. The next 14 days are basically a weather mood ring.
The Immediate Outlook: Sun vs. The Cold Front
Today, Thursday, January 15, is looking pretty stellar. We’re hitting a high of 62°F with nothing but sun. It’s that crisp, classic South Texas winter day where you can actually enjoy being outside without melting. But don’t get too comfortable.
Tomorrow, Friday, January 16, things stay warm—maybe even a bit warmer with a high of 69°F—but the clouds start rolling in by the afternoon. This is the calm before the metaphorical (and literal) storm.
Saturday is when the vibe shifts. A front is pushing through, and we’re looking at a high of only 51°F with overnight lows dropping down to a bone-chilling 37°F. If you’re heading to the Frost Bank Center to see the Spurs take on the Timberwolves on Saturday night, definitely bring the heavy layers. Walking from the parking lot in 18 mph winds is no joke.
Why Sunday Morning Will Be the Real Test
If you have plants outside, Sunday, January 18, is the date to watch. We are looking at an overnight low of 29°F.
That is a hard freeze territory for some of our more sensitive local greenery. Experts like Sarah Spivey from KSAT have been hammering this home: water your plants before the freeze. Wet soil stays warmer than dry soil. It sounds weird, but it works.
The good news? Sunday stays sunny. Even if it’s cold, the sun will be out, and we’ll crawl back up to 55°F by the afternoon.
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The Soggy Shift: Rain is Finally Coming
The second half of the San Antonio 2 week forecast is where things get interesting—and wet. After years of Bexar County being stuck in a drought, we are finally seeing some real moisture on the horizon.
Starting Tuesday, January 20, the humidity is going to spike. We’re talking 74% humidity jumping to a whopping 97% by Wednesday.
Wednesday, January 21, is looking like a total washout. We’re expecting heavy rain with about 1.38 inches of accumulation. For a city that usually deals with "sprinkles," over an inch of rain in one day can cause some serious ponding on the access roads. If you’re commuting on I-10 or 1604, give yourself an extra 20 minutes. You’re gonna need it.
The Late January Warming Trend
After the rain clears, the temperatures aren't staying down. In fact, we’re heading into a strangely warm end of the month.
- Friday, Jan 23: High of 74°F (but watch out for isolated thunderstorms).
- Saturday, Jan 24: High of 72°F with some early showers.
- Sunday, Jan 25: Another 74°F day.
It’s going to feel very muggy. The overcast skies aren't going anywhere, so don't expect those bright blue Texas skies to return until maybe the 28th. This "warm and wet" pattern is exactly what the long-range Almanac predicted for this window, and it looks like it’s holding steady.
Is This the End of the Drought?
Kinda, but not really. While the 1.38 inches on the 21st is great, we’ve been in a deficit for four years. Climatologists are looking at a potential shift from La Niña to El Niño later in 2026, which usually means more rain for us. But for now, these January showers are just a small dent in a very big bucket.
Actionable Advice for San Antonians:
- Saturday Night Prep: If you're going to the Wild West Wildlife Festival or the Spurs game, Saturday and Sunday are the "big coat" days.
- Plant Safety: Move the potted succulents inside by Saturday evening. The 29°F low on Sunday morning will likely bite anything left out.
- Driving Hazards: Wednesday the 21st will be the messiest day on the roads. Check your windshield wipers now. There's nothing worse than realizing your blades are dry-rotted when you're stuck in a downpour on Highway 281.
- Allergy Watch: With the rain and the fluctuating temps, cedar fever is still very much a thing. Keep the antihistamines handy as the wind picks up this weekend.
Basically, keep your umbrella in the car and your sweater on the coat rack. You’re going to use both before the month is out.