Austin Average Monthly Temperatures

Austin, TX Weather Information

Young adults paddleboarding stand up paddling
••• Paddleboarding on Lake Austin. Jodi Jacobson/Getty Images

January

Average high: 62F, 16C

Average low: 42F, 5C

February

Average high: 65F, 18C

Average low: 45F, 7C

 

March

Average high: 72F, 22C

Average low: 51F, 11C

If you're visiting Austin in the spring or early summer, scroll down to the bottom of the page for more information about the possibility of flash flooding. 

April

Average high: 80F, 27C

Average low: 59F, 15C

May

Average high: 87F, 30C

Average low: 67F, 19C

June

Average high: 92F, 33C

Average low: 72F, 22C

July

Average high: 96F, 35C

Average low: 74F, 24C

August

Average high: 97F, 36C

Average low: 75F, 24C

September

Average high: 91F, 33C

Average low: 69F, 21C

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October

Average high: 82F, 28C

Average low: 61F, 16C

November

Average high: 71F, 22C

Average low: 51F, 10C

December

Average high: 63F, 17C

Average low: 42F, 6C

Overview of Austin Weather Year-Round

Many newcomers and visitors arrive with the misguided notion that Austin has a desert-like climate. Technically speaking, Austin has a humid subtropical climate, which means it has long, hot summers and typically mild winters. In July and August, high temps often top out at around 100 degrees F, sometimes for several days in a row. The humidity is usually only at sauna-like levels just before a rainstorm, but even when it’s not raining, the humidity rarely dips below 30 percent. Due to the generally mild climate, allergy season lasts all year.

 

Extreme Weather - Flash Flooding

In May and early June, spring rains can turn the area’s rivers, streams and even dry creek beds into raging walls of water. Several dams control the flow of the Colorado River through the city, creating Lake Austin and Lady Bird Lake. But even these flood control systems can get overwhelmed when the storms move slowly over the area.

Adding to the danger, many smaller streets traverse low-water crossings over normally timid streams. Most water-related tragedies in Austin occur at these low-water crossings, leading local officials to promote the slogan: “Turn around, don’t drown.” The cities and counties in the region operate a constantly updated website that displays the current status of low-water crossings.

In recent years, extended droughts have been more common than heavy rains. In 2013, the water level at Lake Travis dropped so low that many lakeside restaurants found themselves 100 yards or more from the water. Floods in 2015 greatly improved the lake levels, and many of the shuttered businesses reopened. Continued heavy rain in 2016 has sustained the lake levels and led to an economic boom in the Lake Travis area.

Saving Grace: Springs

The underground geology of much of the Austin area is made up of limestone. This porous stone develops pockets over time, which can develop into underground water sources known as aquifers. Cool, refreshing water bubbles up from the Edwards Aquifer to create Austin’s most famous swimming pool, Barton Springs. The three-acre pool in the heart of the city maintains a constant temperature of 68 degrees F year-round.

Because of the steady temperature of the water, many regulars swim year-round at Barton Springs. The water doesn't feel nearly as cold when the air temperature is also in the 60s.

Local TV station KXAN offers a handy interactive tool that allows you to see today’s weather in Austin for the last 10 years

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