When does San Antonio typically see its last 90

In the thick of a warm summer and fall, it can be hard to imagine that it *ever* cools below 90 degrees regularly in San Antonio.

But fear not! We’ll eventually enjoy true sweater weather. It just takes a little patience.

So, when does it, on average, cool below 90 degrees in the Alamo City?

KEY POINTS: • Average last 90-degree day happens in mid-October for San Antonio • Actual date varies year-to-year • Latest to ever hit 90°? Christmas Day 1955

AVERAGE LAST 90° DAY

As meteorologists, we look at the last 30 years for average temperature or precipitation data.

Why 30 years? This amount of time is long enough to account for natural variability from long-term patterns that impact our weather, like La Niña or El Niño.

So, when looking at 1994 to 2024, the average last day with a