Austin sits in a unique transitional zone between the dry deserts of the American Southwest and the lush, humid regions of the Southeast. Classified as humid subtropical, the city experiences long, very hot summers, short and mild winters, and warm to hot spring and fall seasons. Annual rainfall averages 34.32 inches (872 mm), mostly evenly distributed, with spring and fall being the wettest periods. The city enjoys abundant sunshine, totaling around 2,650 hours annually, or 60% of the possible total.

Summers in Austin are notably hot, with July and August highs frequently reaching the high 90s °F (34–36 °C) or above. On average, Austin experiences 123 days per year with highs of 90 °F (32 °C), including roughly 29 days exceeding 100 °F (38 °C). Extreme temperatures have reached 112 °F (44 °C). Humidity in the city fluctuates significantly depending on wind patterns, rising with easterly or southeasterly Gulf winds and dropping with westerly winds from the Chihuahuan Desert.

Winters are mild but occasionally interrupted by short-lived cold snaps known as “Blue Northers.” January, the coolest month, averages a daytime high of 62.5 °F (17 °C) and sees 12 nights at or below freezing. Snowfall is rare, though significant events have occurred, including a 6.4-inch (16 cm) snowstorm in February 2021—the largest two-day snowfall on record. Ice storms also periodically disrupt travel, highlighting the city’s vulnerability to extreme winter weather despite generally mild conditions.

Austin is prone to severe weather, especially in spring. While it lies at the southern edge of Tornado Alley, tornadoes are less frequent than in northern Texas, though supercell thunderstorms can bring damaging winds, lightning, heavy rainfall, and flash flooding. Historical tornado events include the deadly twin tornadoes of May 4, 1922, and the Central Texas tornado outbreak of May 27, 1997.

The city’s climate, combining hot summers, mild winters, and occasional severe storms, shapes both Austin’s natural environment and urban lifestyle, making weather a defining feature of life in the Texas capital.