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Weather

San Antonio Weather Today

Live rain radar, current conditions, an hour-by-hour outlook and a seven-day forecast for San Antonio, with original writing about the city's climate from The Daily San Antonio.

Today's briefing

It's a scorching 25 degrees this morning in San Antonio, though it'll feel closer to 29 with the humidity, and things are only going to heat up as we push toward a maximum of 36 degrees this arvo. There's virtually no chance of rain today with just 1 percent, so you'll want to make the most of any shade you can find. Grab some lightweight, breathable clothing and absolutely don't forget your sunscreen, especially with that very high UV index of 9 working against you all day. The weekend isn't looking much cooler either, with Saturday and Sunday both hitting 36 and 37 degrees respectively and staying bone dry, so keep those hydration levels up and plan your outdoor activities for the cooler morning hours if you can.

28°

Clear · feels like 31°

Today
35° / 25°
Humidity
74%
Wind
16 km/h SE
UV index
0 · Low
Sunrise
6:38 am
Sunset
8:37 pm
Updated
11:02 pm

Next 24 hours

  1. Now

    28°

    0%

  2. 12am

    27°

    0%

  3. 1am

    26°

    0%

  4. 2am

    26°

    0%

  5. 3am

    26°

    0%

  6. 4am

    25°

    0%

  7. 5am

    25°

    0%

  8. 6am

    24°

    0%

  9. 7am

    24°

    0%

  10. 8am

    25°

    0%

  11. 9am

    26°

    0%

  12. 10am

    28°

    0%

  13. 11am

    29°

    0%

  14. 12pm

    31°

    0%

  15. 1pm

    33°

    0%

  16. 2pm

    34°

    0%

  17. 3pm

    35°

    0%

  18. 4pm

    35°

    0%

  19. 5pm

    36°

    0%

  20. 6pm

    35°

    0%

  21. 7pm

    35°

    0%

  22. 8pm

    33°

    0%

  23. 9pm

    31°

    0%

  24. 10pm

    29°

    0%

Live rain radar

Drag to pan, scroll the page over it

Animated rain radar via RainViewer (Bureau of Meteorology sources). Full BOM radar loop.

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Seven-day forecast

  1. Thu

    Overcast

    35° 25°

    Rain 3%

  2. Fri

    Overcast

    36° 24°

    Rain 0%

  3. Sat

    Overcast

    37° 23°

    Rain 0%

  4. Sun

    Overcast

    38° 24°

    Rain 0%

  5. Mon

    Partly cloudy

    38° 24°

    Rain 4%

  6. Tue

    Clear

    39° 24°

    Rain 1%

  7. Wed

    Clear

    39° 23°

    Rain 1%

Air quality

32

Good

US AQI

PM2.5
6
PM10
7
Ozone
47

Air quality by Open-Meteo (CAMS), in µg/m³.

Sun and moon

Sunrise
6:38 am
Sunset
8:37 pm
Daylight
13h 59m

Waning gibbous

82% lit

From the weather desk

San Antonio weather, explained

How to read the San Antonio forecast

A good forecast is really three views at once. The current panel tells you what it feels like outside right now, which is what matters before you head out the door. The hourly strip is for planning the next part of your day: when the rain band arrives, when the wind picks up, when it is warm enough to walk. The seven-day outlook is for the week ahead, and it is most reliable in the first three or four days. Read it from the top down and you will almost always have what you need for San Antonio.

What the UV index actually means

The UV index rates the strength of the sun's ultraviolet radiation on a simple scale. Below 3 is low and you can be outside safely without protection. From 3 to 7 is moderate to high, the point at which sunburn becomes likely within an hour, so a hat and sunscreen earn their keep. Above 8 is very high to extreme, and skin can burn in minutes around the middle of the day. The index peaks at solar noon, not at the hottest part of the afternoon, so the safest habit is to check the number rather than judge by the temperature.

Why the overnight low matters as much as the high

Daytime maximums get the headlines, but the overnight minimum shapes how the day actually feels. A cold night means a slow, crisp start and, on clear evenings, the chance of fog or frost before dawn. A mild night means the warmth carries over and the morning is comfortable from the outset. Clear skies let heat escape and push the low down; cloud cover traps it and keeps the night warmer. That is why two days with the same maximum can feel completely different depending on the night that came before.

San Antonio severe weather alerts

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Weather data by Open-Meteo. The Daily San Antonio is independent and not affiliated with any government weather agency.

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