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Active Weather Warnings

Weather in Round Rock, Texas

12:30 AM
Now
Cloudy Weather
77° F
Feels Like 82°
Precipitation 20 %
Wind 7 mph
Humidity 93 %
Today
Stormy Weather
Day 86°
Night 75°
Precipitation 88 %
Wind 8 mph
UV Index (0 - 11+) 4

Round Rock Weather Forecast Updated

Last updated on
Weather Forecast History
Last Year's Weather on This Day (July 16, 2025)
Cloudy Weather

Day

93°

Night

75°

Wind

11 mph

UV Index

12

Precipitation

3 %

Air Quality in Round Rock

NOW
14 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 2.8 µg/m³
PM10 6.06 µg/m³
O3 0.015 ppm
NO2 1.4 ppb
SO2 0.3 ppb
CO 0.08 ppm
NH3 0.37 µg/m³
NO 0 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)
PM2.52.8 µg/m³
PM106.06 µg/m³
O330.4 µg/m³
NO22.68 µg/m³
SO20.71 µg/m³
CO89.19 µg/m³
NH30.37 µg/m³
NO0 µg/m³

Weather Alerts and Warnings for Round Rock

Severe Future Possible

Flood Watch

Flood Watch issued July 15 at 1:05PM CDT until July 16 at 7:00PM CDT by NWS Austin/San Antonio TX
Jul 15, 1:05 PM Jul 16, 7:00 PM
WHAT: Flooding and flash flooding caused by excessive rainfall
continues to be possible.

WHERE: A portion of south central Texas, including the following
counties, Bandera, Bexar, Blanco, Burnet, Comal, Dimmit, Edwards,
Frio, Gillespie, Guadalupe, Hays, Kendall, Kerr, Kinney, Llano,
Maverick, Medina, Real, Travis, Uvalde, Val Verde, Williamson and
Zavala.

WHEN: Through Thursday evening.

IMPACTS: There is a potential for life threatening flooding
somewhere in the watch area. Considerable to locally catastrophic
flash flooding impacts are likely for the southern Edwards
Plateau, Rio Grande, western Hill Country, and US 90 corridor west
of San Antonio. Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.
Creeks and streams may rise out of their banks. Flooding may occur
in poor drainage and urban areas. Catastrophic impacts are
possible downstream of the heaviest rains. Low-water crossings may
be flooded. Extensive street flooding and flooding of creeks and
rivers are possible.

ADDITIONAL DETAILS:
- Intense rainfall rates and compounding effects from multiple
rounds of storms will maintain a dangerous flash flood threat
through Thursday. Additional rain amounts of 2 to 6 inches
are possible within the Flood Watch area with isolated
amounts of 10 to 15 inches possible in the Rio Grande Plains,
southern Edwards Plateau, western Hill Country, and US 90
corridor west of San Antonio.
- http://www.weather.gov/safety/flood
+ Read More
You should monitor later forecasts and be alert for possible Flood Warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop.
Updated: Jul 15, 11:22 PM Source: NWS Alert