Austin weather in August

August in Austin: sweltering, a little rain — not the time — 41°C afternoons.

Updated September 2026 · climate normals from ERA5 reanalysis

Austin🇺🇸 United States · US South · City47
  1. 74Jan
  2. 79Feb
  3. 90Mar
  4. 84Apr
  5. 69May
  6. 59Jun
  7. 49Jul
  8. 47Aug
  9. 66Sep
  10. 81Oct
  11. 87Nov
  12. 76Dec

#12 of 12 months in Austin · #1260 of 1413 destinations to visit in August · comfort 47/100 (tier F)

Days
38°C
Nights
25°C
Wet days
5
Sun
11.4 h
Humidity
62%
Daylight
13 h
Austin, United States
Photo: Thomas balabaud · Pexels

Traveller notes on Austin in August

Other months in Austin

Regulars call this the most unpredictable month of the year here, capable of sub-freezing cold or 60-plus Fahrenheit warmth within the same week - one recent February never dropped below freezing at all and ran genuinely hot, while a different year brought a full week of snow and ice. Our row backs the moderate average sitting between those real extremes, 19.6C over 7.4C nights feeling 5C, with 52.2mm of rain across 4.9 days and a trace of possible snow, 0.9cm. Regulars are direct that the practical response is flexibility rather than optimism - avoid non-refundable bookings and be ready to adjust plans on short notice given how fast conditions can flip. The record: humidity 70 percent, 6.8 hours of sun, a 20.5 kph wind and AQI 36.
SchizophrenicMonthSameWeekBothExtremes · February · 1 month ago · Read more on Tripadvisor ↗
October is the month regulars rate highest for weather here - late October into November is the best of the year - and the month the city is hardest to book. The festival weekends, the grand prix and the university's home games between them fill the hotels, push rates up and bring minimum stays, so the advice is to book early or choose the weeks between. If you are not going to the festival it barely touches downtown, because the music is all out at the park. Our row gives 29.4C over 16.5C at 62 percent humidity with 91.4mm of rain across 5.7 days - sixteen millimetres at a time. The record: 9.1 hours of sun, a 17.2 kph wind and AQI 38.
BookBeforeTheFestivalDoes · October · 1 month ago · Read more on Tripadvisor ↗
April is the month regulars hand out here, and the reason is the hill country: the bluebonnets run from March and the real show is usually early to mid April, with nothing left by summer. The weather half is a slope - pleasant and not yet hot at the start, hot and humid by the end, with nights still in the low teens. Our row averages 27.3C over 15.1C, a twelve-degree gap, at 68 percent humidity with a 21.4 kph wind. Rain is 108mm across 6.5 days, which means storms rather than showers when they arrive. Wildflower roads west of the city are the day out this month is for. The record: a dew point of 13.5C, 8.8 hours of sun and AQI 40.
BluebonnetsThenTheHeat · April · 1 month ago · Read more on Tripadvisor ↗
November is the month Austin regulars hand over as the city's best weather, with the summer humidity gone and highs in the 60s and 70s Fahrenheit through the first half. The month does not hold still, though: by late November it has turned, shorts are unlikely, and the standing description of the swing is 40 one day and 75 the next. What they suggest packing for the last week is jeans, a long-sleeved shirt and a light jacket. Two practical consequences follow: the rivers are too cool for tubing by now, a heated pool aside, and the Hill Country is the day trip people name instead. Our row's 22.9C average high against 10.8C nights is that gap in one line. The record: 5.1 precipitation days carrying 56.2mm, 7.2 hours of sun and AQI 34.
FortyOneDaySeventyFiveTheNext · November · 1 month ago · Read more on Tripadvisor ↗

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Austin climate normals — August

Daytime high38°C / 100°F🔥 sweltering
Nighttime low25°C / 77°F
Feels like (high)41°C / 106°F
Rainfall78 mm / 3.1 in🌦 some rain
Rainy days5 days
Humidity62%💧 humid
Dew point21°C / 70°F
Sunshine11.4 h/day
Daylight13.2 h
Wind17 km/h / 11 mph
Air quality (US AQI)51🙂 moderate

Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.

Crowds in Austin in August

How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.

BusySummer break in United States, school holidays in 2 of the markets that fill it(estimated)

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Peak crowdsBusyShoulder seasonQuiet

Best months for Austin's weather

Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).

Toughest weatherAustin's best weather comes in March, April and November — separate windows, not one continuous season.

August coincides with Texas summer heat.

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Best weatherFair weatherToughest weather

What's on in Austin in August

Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.

  • Nature

    Congress Avenue bats

    20 Mar – 1 Nov · usuallyWildlife season

    A million and a half Mexican free-tailed bats roost under the bridge from spring until they head south in the autumn. August, when the pups are flying, gives the biggest emergence at dusk. Source ↗

  • Hazard

    Blue-green algae on the lake

    15 May – 31 Oct · usuallyAlgae & red tideClosures

    The city posts warnings for toxic cyanobacteria on Lady Bird Lake through the warm months. It is a dog problem more than a swimmer's problem, but it closes the water access points. Source ↗

  • Hazard

    Texas summer heat

    1 Jun – 20 Sep · usuallyExtreme heat

    Weeks of triple-digit afternoons with the run of hundred-degree days now routinely stretching into September. Anything outdoors happens before nine or after eight, or in Barton Springs. Source ↗

What's on around the world in August →

Where is Austin?

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Austin in August — FAQ

Is August a good time to visit Austin?
August in Austin: sweltering, a little rain — not the time — 41°C afternoons. It ranks #12 of 12 months for Austin on SeasonMap's comfort score (47/100).
What is the weather like in Austin in August?
In August, Austin averages a daily high of 37.6°C and a low of 24.9°C, with about 77.6 mm of rain over roughly 4.8 rainy days.
What is the air quality in Austin in August?
Austin has a mean US Air Quality Index of about 51 in August.