San Antonio weather live forecast

Today's maximum temperature in San Antonio is expected to be 39°C. Select a day from the live weather forecast for San Antonio, Texas, USA for more weather parameters.

5-day weather forecast updated at 04:01 on Wednesday 20th August 2025 GMT

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The 5-day weather forecast for Texas (San Antonio) is provided by the Swiss meteorological agency, meteoblue. Find out more about our data sources.

San Antonio weather forecast by day

Below are the detailed weather forecasts for San Antonio for the next 5 days.

San Antonio weather for Wednesday 20th August 2025

Expect isolated thunderstorms in San Antonio, Texas with a maximum temperature of 39°C, very high levels of heat & humidity, maximum UV of 8 (Very High) and 9 hours of bright sunshine. There are 0-2 mm of rainfall expected with 25% chance of some rain and a gentle breeze of 15 kph from the north-east.

  • 39°C maximum temperature39
    °C maximum temperature
  • 23°C minimum temperature23
    °C minimum temperature
  • Isolated thunderstorms
    isolated thunderstorms
  • 9 hours of bright sunshine9
    hours of sunshine
  • UV (maximum) index 8 (Very High)8
    UV index (Very High)
  • 25% chance of some rain25
    % chance of some rain
  • 0-2 mm of rainfall expected<2
    mm of rainfall expected
  • Very high heat & humidityVH
    very high heat & humidity
  • Gentle breeze of 15 kph from the North-East15
    kph wind from NE

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San Antonio weather for Thursday 21st August 2025

Expect isolated thunderstorms in San Antonio, Texas with a maximum temperature of 37°C, very high levels of heat & humidity, maximum UV of 8 (Very High) and 5 hours of bright sunshine. There are 2-5 mm of rainfall expected with 59% chance of some rain and a light breeze of 12 kph from the north.

  • 37°C maximum temperature37
    °C maximum temperature
  • 25°C minimum temperature25
    °C minimum temperature
  • Isolated thunderstorms
    isolated thunderstorms
  • 5 hours of bright sunshine5
    hours of sunshine
  • UV (maximum) index 8 (Very High)8
    UV index (Very High)
  • 59% chance of some rain59
    % chance of some rain
  • 2-5 mm of rainfall expected<5
    mm of rainfall expected
  • Very high heat & humidityVH
    very high heat & humidity
  • Light breeze of 12 kph from the North12
    kph wind from N

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San Antonio weather for Friday 22nd August 2025

Expect scattered clouds in San Antonio, Texas with a maximum temperature of 37°C, very high levels of heat & humidity, maximum UV of 8 (Very High) and 8 hours of bright sunshine. There are 0-2 mm of rainfall expected with 34% chance of some rain and a gentle breeze of 15 kph from the east.

  • 37°C maximum temperature37
    °C maximum temperature
  • 24°C minimum temperature24
    °C minimum temperature
  • Scattered clouds
    scattered clouds
  • 8 hours of bright sunshine8
    hours of sunshine
  • UV (maximum) index 8 (Very High)8
    UV index (Very High)
  • 34% chance of some rain34
    % chance of some rain
  • 0-2 mm of rainfall expected<2
    mm of rainfall expected
  • Very high heat & humidityVH
    very high heat & humidity
  • Gentle breeze of 15 kph from the East15
    kph wind from E

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San Antonio weather for Saturday 23rd August 2025

Expect broken clouds in San Antonio, Texas with a maximum temperature of 38°C, very high levels of heat & humidity, maximum UV of 9 (Very High) and 5 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 16 kph from the east.

  • 38°C maximum temperature38
    °C maximum temperature
  • 24°C minimum temperature24
    °C minimum temperature
  • Broken clouds
    broken clouds
  • 5 hours of bright sunshine5
    hours of sunshine
  • UV (maximum) index 9 (Very High)9
    UV index (Very High)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • Very high heat & humidityVH
    very high heat & humidity
  • Gentle breeze of 16 kph from the East16
    kph wind from E

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San Antonio weather for Sunday 24th August 2025

Expect isolated thunderstorms in San Antonio, Texas with a maximum temperature of 39°C, very high levels of heat & humidity, maximum UV of 9 (Very High) and 6 hours of bright sunshine. There are 0-2 mm of rainfall expected with 25% chance of some rain and a gentle breeze of 16 kph from the east.

  • 39°C maximum temperature39
    °C maximum temperature
  • 24°C minimum temperature24
    °C minimum temperature
  • Isolated thunderstorms
    isolated thunderstorms
  • 6 hours of bright sunshine6
    hours of sunshine
  • UV (maximum) index 9 (Very High)9
    UV index (Very High)
  • 25% chance of some rain25
    % chance of some rain
  • 0-2 mm of rainfall expected<2
    mm of rainfall expected
  • Very high heat & humidityVH
    very high heat & humidity
  • Gentle breeze of 16 kph from the East16
    kph wind from E

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Metric (°C / mm)  |  Imperial (°F / inches)

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