Verdict: Good month
Austin Weather in September
September is seriously hot in Austin — days average 33°C (91°F), so plan mornings out and afternoons in the shade or the water. Rain is occasional — about 8 wet days in a typical year. Overall, September is a solid month to visit Austin.
Average high
33°C / 91°F
Average low
22°C / 72°F
Rain days
~8
Precipitation
92 mm
What to pack for Austin in September
- Light, breathable clothing — linen and technical fabrics earn their keep
- High-SPF sunscreen, sunglasses, and a refillable water bottle
- A packable rain shell or compact umbrella earns its space
- Comfortable walking shoes — every guide on this site assumes you'll use them
September against the rest of the year
Warmest in Austin: Aug (36°C / 97°F) · Coolest: Jan (17°C / 63°F) · Wettest: May (~15 rain days)
17°
6°
Jan
18°
6°
Feb
24°
13°
Mar
26°
16°
Apr
30°
20°
May
34°
23°
Jun
35°
25°
Jul
36°
25°
Aug
33°
22°
Sep
28°
17°
Oct
22°
12°
Nov
19°
9°
Dec
Daily highs / lows in °C · bars show rain days per month · ERA5 climate normals (2020–2024)