Climate & Weather in Austin
Austin has a humid subtropical climate: hot, often muggy summers with genuinely extreme heat by national standards, and mild winters with no real snow season. Austin averages an estimated 29 days per year at or above 100°F, with August highs averaging around 98°F, and annual rainfall of roughly 32 inches concentrated in a way that produces both real drought risk and real flash-flood risk in the same climate.
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Learn moreSummer: Genuinely Extreme Heat
Austin averages an estimated 29 days per year at or above 100°F, with August -- the hottest month -- averaging a high around 98°F. This is a defining, non-trivial feature of living here: most summer days reach at least 90°F, and the 100°F-plus stretch typically runs from mid-summer into early fall, with year-to-year variation in exactly when it starts (2026 saw its first 100°F day later than typical, for example, with a wetter-than-usual late spring delaying the onset). Humidity adds to the discomfort in a way a temperature-only figure understates.
Winter: Mild, With Occasional Cold Snaps
Austin winters are mild by most national comparisons, with no reliable snow season -- but the region is not immune to occasional severe cold-weather events (the February 2021 winter storm that caused widespread Texas power-grid failures is the most consequential recent example, though that was a statewide, not Austin-specific, event). "Mild winters" should not be read as "no winter weather risk at all," even if such events are rare relative to the summer heat that defines most of the year.
Rainfall, Drought, and the Highland Lakes
Austin receives an estimated 32 inches of rain annually, but that rainfall arrives unevenly -- concentrated storm events (the same mechanism behind the flash-flood risk covered on the flood-hurricane-risk page) alternating with extended dry stretches that produce real drought conditions. As of an April 2026 snapshot, the Highland Lakes (Austin's primary water-supply reservoirs) sat at 96.5% full (Lake Buchanan) and 73.5% full (Lake Travis), with the city in its baseline Conservation Stage of drought watering restrictions -- one or two watering days per week depending on irrigation method. Austin moved out of a more restrictive Stage 2 drought status in September 2025 after heavy July rains replenished the lakes; the underlying pattern, though, is a water supply that swings meaningfully between drought stress and replenishment year to year.
Wildfire Risk
Austin carries genuine wildfire exposure on its most dangerous fire-weather days, and that risk is expected to increase through 2050 per climate-risk analysis reviewed August 2026 -- one source found that of 548 census tracts in the Austin area, 529 have more than a quarter of buildings with significant fire risk, and 522 have more than half. This is a real, if less commonly discussed, climate hazard alongside heat, drought, and flash flooding -- particularly relevant for properties near the wildland-urban interface in the Hill Country areas west of the city.
A Climate of Genuine Extremes, Not a Single Simple Story
Austin's climate is best understood as a set of genuine extremes coexisting in the same place: severe summer heat, periodic drought, real wildfire risk on the worst fire-weather days, and -- on the opposite end -- real flash-flood risk when intense rain does fall. Anyone relocating from a milder or more climatically stable region should plan around all of these, not just the headline "hot Texas summer" characterization.
Key takeaways
- Austin averages an estimated 29 days per year at or above 100°F, with August highs averaging around 98°F -- genuinely extreme heat, not just "warm."
- Winters are mild with no reliable snow season, though rare severe cold-weather events (e.g., February 2021) have occurred statewide.
- Annual rainfall averages ~32 inches but arrives unevenly, producing both real drought risk (Highland Lakes levels fluctuate meaningfully year to year) and real flash-flood risk from the same concentrated-storm pattern.
- Wildfire risk is real and rising -- one climate-risk analysis found the large majority of Austin-area census tracts have significant building fire-risk exposure, expected to worsen through 2050.
- Austin's climate combines several genuine extremes (heat, drought, wildfire, flash flood) rather than presenting a single simple "hot Texas" story.
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