September · United States
Best time to visit Austin in September Weather, crowds & prices
Weather in Austin in September
Average temperature 28°C, 59 mm of rain, about 29 days with 6+ hours of sunshine and 60% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
September score
6.7/10
Ranked #8 of 12 months
- Avg temp
- 28°C
- Rainfall
- 59 mm
- Humidity
- 60%
- Days with 6h+ sun
- 29
- Crowd Density
- Moderate Crowds
- Average Expenses
- $$ · Moderate Cost ($$)
September in Austin scores 6.7/10 for sightseeing and cultural travel - ranked #8 of 12. Expect around 28°C, 59 mm of rain, and roughly 29 days with 6+ hours of sunshine this month.
Live-music nights and BBQ patios feel most comfortable January through March.
September in Austin: mixed conditions, plan around the weather
September averages 28°C (82°F), so the practical pattern is early mornings, a long midday break, and evenings back outside.
Rainfall runs 59 mm, so plan one flexible day in three; you still get about 29 days with 6+ hours of sunshine and 12.3 hours of daylight.
It scores 6.7/10 here, 8th of 12 months, against 8.8/10 in the destination's best month.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a packable rain layer.
Figure on mid-season pricing, with crowds are moderate.
Flexible dates? March scores 2.1 points higher here — enough to change the trip.
Frequently asked
- What is the weather like in Austin in September?
- In September, Austin averages 28°C, 59 mm of rain, and about 29 days with 6+ hours of sunshine. Its climate-comfort score is 6.7/10.
- Is September a good time to visit Austin?
- September earns a 6.7/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Austin in September?
- Expect about 59 mm of rain in September. Average humidity is 60% and there are about 29 days with 6+ hours of sunshine.
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