San Antonio Precipitation: Average Monthly Rainfall and Snowfall

This graph shows the average amount of rainfall per month in San Antonio (). The numbers are calculated over a 30-year period to provide a reliable average.

• A lot of rain (rainy season) falls in the months: January, February, March, April, May, June, July, August, September, October, November and December.
• On average, April is the wettest month with 383 mm of precipitation.
• On average, August is the driest month with 140 mm of precipitation.
• The average amount of annual precipitation is 3431 mm.