San Antonio weather live forecast

Today's maximum temperature in San Antonio is expected to be 37°C. Select a day from the live weather forecast for San Antonio, Texas, USA for more weather parameters.

Saturday
19th Sep
37

23

9

5
Sunday
20th Sep
37

23

8

9
Monday
21st Sep
38

24

7

9
Tuesday
22nd Sep
38

24

8

8
Wednesday
23rd Sep
37

25

7

9

5-day weather forecast updated at 04:00 on Saturday 19th September 2026 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 Saturday 19th September 2026

Expect scattered clouds in San Antonio, Texas with a maximum temperature of 37°C, very high levels of heat & humidity, maximum UV of 5 (Moderate) and 9 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 17 kph from the south-east.

37
°C maximum temperature
23
°C minimum temperature
scattered clouds
9
hours of sunshine
5
UV index (Moderate)
0
mm of rainfall expected
VH
very high heat & humidity
17
kph wind from SE

San Antonio weather for Sunday 20th September 2026

Expect scattered clouds in San Antonio, Texas with a maximum temperature of 37°C, very high levels of heat & humidity, maximum UV of 9 (Very High) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 15 kph from the south-east.

37
°C maximum temperature
23
°C minimum temperature
scattered clouds
8
hours of sunshine
9
UV index (Very High)
0
mm of rainfall expected
VH
very high heat & humidity
15
kph wind from SE

San Antonio weather for Monday 21st September 2026

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 7 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 14 kph from the south-east.

38
°C maximum temperature
24
°C minimum temperature
broken clouds
7
hours of sunshine
9
UV index (Very High)
0
mm of rainfall expected
VH
very high heat & humidity
14
kph wind from SE

San Antonio weather for Tuesday 22nd September 2026

Expect scattered clouds in San Antonio, Texas with a maximum temperature of 38°C, very high levels of heat & humidity, maximum UV of 8 (Very High) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 15 kph from the east.

38
°C maximum temperature
24
°C minimum temperature
scattered clouds
8
hours of sunshine
8
UV index (Very High)
0
mm of rainfall expected
VH
very high heat & humidity
15
kph wind from E

San Antonio weather for Wednesday 23rd September 2026

Expect broken clouds in San Antonio, Texas with a maximum temperature of 37°C, very high levels of heat & humidity, maximum UV of 9 (Very High) and 7 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 17 kph from the east.