30YearWeather
Austin in September
Austin weather in September - United States
☀️Hot & Sunny

Austin Weather in September

Plan your September trip to Austin, United States. Based on 30 years of NASA data, expect temperatures of 32°C (high) to 22°C (low), with 19% rain probability and 8 hours of daily sunshine. Great conditions with only 2 rainy days expected.

Avg High
32°C

Hottest around day 1

Avg Low
22°C

Coolest around day 29

Rainy Days
2days

19% avg rain chance

Sunshine
8hrs/day

Autumn season

Austin September Weather Calendar

Click any day to see detailed weather information

Currency

USD

$ United States dollar

Language

English

Driving

Right side

Safety

Moderate Safety

GPI: 2.44

Travel Intelligence

Exclusive flight analytics & health data for Austin

Smart Flight Estimator

Airport-to-Airport Logistics

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Add your home location in settings to see airport details.

Flight Connectivity Analysis

Airport traffic data & seasonal patterns

Well Connected
65/ 100
Traffic Index

Popular destination

Peak Daily Arrivals

0

slots per day

Peak

May

Low

Jan

Monthly Traffic Distribution

264
Jan
269
Feb
293
Mar
364
Apr
377
May
320
Jun
342
Jul
336
Aug
335
Sep
320
Oct
266
Nov
328
Dec
Traffic Level
Low Season

Key Connections

Denver (DEN)
Dallas-Fort Worth (DFW)
Atlanta Hartsfield Jackson (ATL)
Los Angeles (LAX)
Phoenix Sky Harbor (PHX)

Health & Safety Advisory

CDC travel health recommendations

No Requirements

No Special Vaccinations Required

Standard travel precautions apply

Source: CDC Travelers' Health

View Complete Health Guide

Is September a Good Time to Visit Austin?

👌A reasonable choice for your trip
Short Answer

September isn't Austin's most comfortable season - 32°C and sticky 64% humidity will challenge most visitors. Consider air-conditioned tours and plan for afternoon breaks.

Decision Factors

Very hot conditions

32°C average highs - limit midday exposure

Feels significantly hotter than 32°C

Heat index: 38°C due to 64% humidity

Peak tourist season

89% of annual peak - expect crowds and high prices

Plenty of sunshine

10h of sunshine daily

Exceptional dining scene

48 Michelin-listed restaurants

Good For

  • 📸
    Photographers

    10h sunshine, 59% clear skies for golden hour shots

  • 💑
    Honeymoon couples

    Wedding score 94/100 with romantic weather conditions

  • 💼
    Business travelers

    Climate-controlled meetings unaffected by weather

Who Should Avoid

  • 💰
    Budget travelers

    Peak season means premium prices everywhere

  • 👴
    Elderly travelers

    Heat index of 38°C poses health risks

  • 🌡️
    Heat-sensitive visitors

    38°C feels-like temperature creates discomfort

900 observations30-year historical data
Confidence: 95%

"According to 30YearWeather's analysis of 30 years of NASA POWER satellite data,Austin in September averages 32°C with 19% precipitation probability."

📊 Source: 30YearWeather.com🛰️ Data: NASA POWER (1991-2021)View Methodology →

Frequently Asked Questions: Austin in September

What are the temperatures in Austin in September?

Daytime highs average 32°C, nights drop to 22°C. Temperatures remain fairly consistent.

How many rainy days in Austin in September?

Expect around 2 days with measurable rainfall. Rain is unlikely to disrupt plans.

What to wear in Austin in September?

Light, breathable fabrics. Don't forget sunglasses and a hat.

Is September peak season in Austin?

This is shoulder season—moderate prices and manageable crowds.