Weather in Round Rock in September
Round Rock, United States averages a high of 31.3°C (88.3°F) and low of 21.6°C (70.9°F) in September, with 7 rain days and 10.3 hours of daily sunshine. Travel score: 89.2/100 (Excellent). The best time to visit Round Rock is September.
High
31°C88°F
Low
22°C71°F
🌧️
7
rain days
☀️
10.3
hrs/day sunshine
💧
65%
humidity
89— Excellent
September in Round Rock is hot and mostly dry — excellent conditions for exploring.
What are the average temperatures in Round Rock?
How much does it rain in Round Rock in September?
Round Rock receives an average of 76.5mm of rainfall across 7 rainy days in September. The annual total is 903.9mm.
What should I pack for Round Rock in September?
Essentials
👟
Comfortable walking shoes
Essential for exploring the city
👕
Light, breathable clothing
Hot weather with highs around 31°C
🧢
Sun hat or cap
Protection from intense sun
🧴
Sunscreen SPF 30+
10 hours of sunshine daily
🕶️
Sunglasses
Protect your eyes from bright sun
Traveling to United States in September?
Don't let a public holiday surprise you — restaurants, shops, and attractions may be closed.
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Data based on 1994–2024 averages · Last updated: 2024-12-31