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San Antonio River

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San Antonio River Weather, Climate and Best Time to Visit

Data source：Meteostat
Update date：2025-09

San Antonio River year round climate

  • Spring (March–May): Average 19.6–25.8°C, mild and comfortable climate, with the most rainfall in April, and vibrant plant life. Common activities: outdoor picnics, cycling, visiting historical sites. Suggested clothing: light jacket, long-sleeved shirt, comfortable shoes.
  • Summer (June–August): Average 29.4–30.4°C, hot and dry, with less rainfall in some months. Common activities: swimming, relaxing in shaded areas, visiting museums and art galleries. Suggested clothing: light and breathable clothing, hat, sunglasses.
  • Autumn (September–November): Average 23.9–17.9°C, pleasant climate with gradually decreasing temperatures. Common activities: hiking, viewing autumn leaves (certain tree species), outdoor concerts. Suggested clothing: light jacket, long-sleeved or short-sleeved shirt, depending on the weather.
  • Winter (December–February): Average 14.4–15.9°C, mild and dry, with occasional rainfall. Common activities: visiting indoor attractions, enjoying hot drinks, shopping. Suggested clothing: light jacket, long-sleeved shirt, warm clothing.

San Antonio River climatological average

Annual average temperature: approx. 23°C / Annual rainfall: approx. 699 mm / Summer humidity: 60%–70% / Rainiest month: April

San Antonio River monthly average temperature and precipitation

Month
Air temperature (°C)
Precipitation (mm)
January
13.1°C
96.2
February
15.9°C
31.4
March
19.6°C
48.8
April
21.8°C
162.1
May
25.8°C
102.2
June
29.4°C
34.3
July
29.9°C
33
August
30.4°C
72
September
28.2°C
14.3
October
23.9°C
25.5
November
17.9°C
55.2
December
14.4°C
24.7

San Antonio River weather for the next seven days

12/15
Monday
Sunny
16.6°C/1.3°C
12/16
Tuesday
Overcast
13.8°C/7.1°C
12/17
Wednesday
Heavy rain
19.8°C/12.9°C
12/18
Thursday
Partly Cloudy
25.8°C/12.3°C
12/19
Friday
Sunny
19.4°C/9.7°C
12/20
Saturday
Fog
27°C/12.4°C
12/21
Sunday
Partly Cloudy
28.9°C/18.2°C

San Antonio River Frequently Asked Questions and Useful Information for Travel

How much does it cost to ride the riverboat in San Antonio?

The GO RIO River Cruises typically cost $13.50 for adults with a valid ID. These scenic cruises last about 35 minutes and operate daily from morning until evening, offering a wonderful way to experience the San Antonio River.

What is the best time to visit the San Antonio River Walk?

The most pleasant times to visit the San Antonio River Walk are generally in the spring, from March to May, and in the fall, from September to November. During these seasons, the weather is mild and ideal for enjoying the outdoor charm of the River Walk.

How long is the boat ride on the San Antonio River Walk?

The standard GO RIO boat tour on the San Antonio River Walk lasts approximately 35 minutes. This duration allows ample time to connect with the city's rich culture, history, architecture, and enduring charm as you glide along the water.

How many miles long is the San Antonio Riverwalk?

The San Antonio River Walk spans an impressive 15 miles in total length. While it extends for 15 miles, approximately 5 miles of this vibrant pathway flow through the heart of downtown San Antonio, offering numerous points of interest.

What can I see on a San Antonio River boat tour?

A San Antonio River boat tour provides a unique perspective on the city's vibrant culture, fascinating history, stunning architecture, and timeless charm. You'll get to see diverse scenes and learn about the significance of this iconic waterway.