I don't have statistics, but a lot of years we have a long stretch without significant rain and temperatures that are really too hot for grass. It's usually a lot greener between November and June.
I am near Bulverde. I have a personal weather station that I can check history of weather on my property. Last rain was June. I run my sprinkler system one day per week, just to keep the lawn alive.
It has been 90 days straight of high temps above 90. This was the hottest August and September EVER in SA....no BS....look it up. So yeah it's brown in SA. (avoiding the troll bait).
The south side is pretty bad. Drought and rain totals down there seem to be a bit less than the popcorn showers on the north side around the Dominion /I10/hill country corridor.