Today | Weather | Sunday, October 4, 2026

Weather in Round Rock, Texas

03:23 PM
Now
Stormy Weather
73° F
Feels Like 73°
Precipitation 76 %
Wind 9 mph
UV Index (0 - 11+) 1
Humidity 94 %
Today
Stormy Weather
Day 75°
Night 68°
Precipitation 82 %
Wind 10 mph
UV Index (0 - 11+) 1

Round Rock Weather Forecast Updated

45 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (October 4, 2025)
Night

Day

88°

Night

66°

Wind

6 mph

Precipitation

1 %

Air Quality in Round Rock

NOW
29 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 3.29 µg/m³
PM10 3.59 µg/m³
O3 0.031 ppm
NO2 0.8 ppb
SO2 0.2 ppb
CO 0.13 ppm
NH3 0.2 µg/m³
NO 0.24 µg/m³
PM2.5 – Fine particles <2.5μm
PM10 – Inhalable particles <10μm
O3 – Ozone
NO2 – Nitrogen dioxide
SO2 – Sulfur dioxide
CO – Carbon monoxide
NH3 – Ammonia
NO – Nitric oxide

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

Show raw pollutant concentrations (µg/m³)
PM2.5 – 3.29 µg/m³
PM10 – 3.59 µg/m³
O3 – 60.93 µg/m³
NO2 – 1.56 µg/m³
SO2 – 0.44 µg/m³
CO – 154.1 µg/m³
NH3 – 0.2 µg/m³
NO – 0.24 µg/m³