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Weather in San Antonio for August 2025

Your guide to San Antonio weather in August - trends and predictions
  • In general, the average temperature in San Antonio at the beginning of August is 38.7 °F. As the month progressed, temperatures tended to moderately fall, reaching an average of 37.6 °F by the end of August.

  • With an average of 3 rainy days, San Antonio experiences minimal rainfall in August.

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Average dry days
28
Dry days
Average rainy days
3
Rainy days
Average snowy days
0
Snow days
Average temperatures
41°/25°
Temperatures
Average wind speed
24 km/h
Avg max wind
Average humidity
49 %
Avg humidity

San Antonio in August average weather

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Temperatures trend during August in San Antonio

See the weather trend as well as the moving average line

August weather day by day

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Date Weather Temperatures Rain UV More
Aug. 1 Cloudy
Cloudy
38° /23° 0 mm 9
Aug. 2 Overcast
Overcast
38° /23° 0 mm 9
Aug. 3 Overcast
Overcast
39° /25° 0 mm 9
Aug. 4 Sunny
Sunny
39° /25° 1.8 mm 9
Aug. 5 Cloudy
Cloudy
39° /25° 0 mm 9
Aug. 6 Overcast
Overcast
39° /25° 0 mm 9
Aug. 7 Overcast
Overcast
39° /25° 0 mm 9
Aug. 8 Overcast
Overcast
40° /25° 0 mm 9
Aug. 9 Overcast
Overcast
40° /24° 0 mm 9
Aug. 10 Overcast
Overcast
39° /24° 0.6 mm 9
Aug. 11 Overcast
Overcast
39° /25° 0 mm 9
Aug. 12 Overcast
Overcast
39° /25° 0 mm 9
Aug. 13 Overcast
Overcast
39° /25° 0 mm 9
Aug. 14 Overcast
Overcast
39° /24° 0 mm 9
Aug. 15 Sunny
Sunny
39° /25° 0 mm 10
Aug. 16 Patchy rain possible
Patchy rain possible
39° /25° 0.1 mm 9
Aug. 17 Sunny
Sunny
40° /25° 0 mm 10
Aug. 18 Sunny
Sunny
39° /24° 0 mm 10
Aug. 19 Overcast
Overcast
40° /24° 0 mm 9
Aug. 20 Overcast
Overcast
41° /24° 0 mm 10
Aug. 21 Partly cloudy
Partly cloudy
42° /27° 0.4 mm 10
Aug. 22 Patchy rain possible
Patchy rain possible
37° /26° 2.7 mm 8
Aug. 23 Moderate rain at times
Moderate rain at times
37° /24° 1.3 mm 9
Aug. 24 Cloudy
Cloudy
37° /24° 0 mm 8
Aug. 25 Partly cloudy
Partly cloudy
38° /25° 0 mm 10
Aug. 26 Partly cloudy
Partly cloudy
38° /23° 2.3 mm 9
Aug. 27 Sunny
Sunny
39° /23° 5.2 mm 9
Aug. 28 Patchy rain possible
Patchy rain possible
39° /25° 0.5 mm 8
Aug. 29 Partly cloudy
Partly cloudy
36° /25° 0.4 mm 8
Aug. 30 Partly cloudy
Partly cloudy
36° /24° 0 mm 8
Aug. 31 Sunny
Sunny
37° /25° 1.8 mm 9
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Important Notice
Our weather forecast for San Antonio in August is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the San Antonio forecast closer to your planned date for the most up-to-date weather information.

San Antonio in August - FAQ

What are the expected maximum and minimum temperatures in San Antonio during August?
With daytime temperatures soaring above 41° and not dropping much below 25° at night, August in San Antonio is quite hot. Staying hydrated and avoiding peak sun hours is advisable.
How much rainfall should be expected in San Antonio during August?
Rainfall in San Antonio during August is rare to nonexistent, with the total expected rainfall being less than 10 mm and approximately 3 days seeing any precipitation. Planning without the concern for rain is generally straightforward during this very dry period.
What are the typical wind conditions in San Antonio during August?
The average wind speed in San Antonio during August is 24 km/h, suggesting breezy to windy conditions, depending on your activities.

August rainfall patterns in San Antonio

Explore the daily rainfall trends and prepare for San Antonios August weather 💧

UV exposure in San Antonio during August

Stay informed about UV levels for safe outdoor activities throughout the month of August ☀️

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Location coordinates Where is San Antonio?

Get accurate weather forecasts for San Antonio, located at latitude 29.424 and longitude -98.494. Stay updated with localized weather information tailored for San Antonio.

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