Today | Weather | Tuesday, April 21, 2026

Active Weather Warnings

Weather in Georgetown, Texas

06:05 PM

Now

64° F

Feels Like 63°

Precipitation 55 %

Wind 8 mph

UV Index (0 - 11+) 0

Humidity 93 %

Today

Day 64°

Night 63°

Precipitation 98 %

Wind 8 mph

UV Index (0 - 11+) 2

Georgetown Weather Forecast Updated

50 minutes ago

Last updated on April 21, 2026 at 5:14 PM

Air Quality in Georgetown

NOW

34 AQI

Good air quality Dominant pollutant: O₃

Pollutant Concentrations:

PM_2.5 2.67 µg/m³

PM₁₀ 3.5 µg/m³

O₃ 0.037 ppm

NO₂ 1.9 ppb

SO₂ 0.3 ppb

CO 0.13 ppm

NH₃ 1.14 µg/m³

NO 0.2 µg/m³

PM_2.5 – 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)

PM_2.5 – 2.67 µg/m³

PM₁₀ – 3.5 µg/m³

O₃ – 71.75 µg/m³

NO₂ – 3.55 µg/m³

SO₂ – 0.85 µg/m³

CO – 145.03 µg/m³

NH₃ – 1.14 µg/m³

NO – 0.2 µg/m³

View Hourly Air Quality Forecast

Weather Alerts and Warnings for Georgetown

Severe Immediate Likely

Flash Flood Warning

Flash Flood Warning issued April 21 at 3:01PM CDT until April 21 at 6:15PM CDT by NWS Austin/San Antonio TX

Apr 21, 3:01 PM → Apr 21, 6:15 PM

FFWEWX

The National Weather Service in Austin/San Antonio has extended the

* Flash Flood Warning for...
Central Williamson County in south central Texas...

* Until 615 PM CDT.

* At 301 PM CDT, Emergency management reported several low water
crossings remain closed due to flooding throughout Williamson
County. Between 2 and 4 inches of rain have fallen. Additional
rainfall amounts up to 1 inch are possible in the warned area.
Flash flooding is already occurring.

HAZARD...Life threatening flash flooding. Thunderstorms
producing flash flooding.

SOURCE...Emergency management reported.

IMPACT...Life threatening flash flooding of creeks and streams,
urban areas, highways, streets and underpasses.

* Some locations that will experience flash flooding include...
Round Rock, Georgetown, Taylor, Serenada, Leander, Hutto, Liberty
Hill, Jarrell, Florence, Thrall, Weir, Georgetown Dam, Sun City,
Andice, Coupland, Jonah, Walburg, Theon, Waterloo and Seward
Junction.

+ Read More

Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Be aware of your surroundings and do not drive on flooded roads. Stay away or be swept away. River banks and culverts can become unstable and unsafe. In hilly terrain there are hundreds of low water crossings which are potentially dangerous in heavy rain. Do not attempt to cross flooded roads. Find an alternate route.

Updated: Apr 21, 5:14 PM Source: NWS Alert

Minor Expected Likely

Flood Advisory

Flood Advisory issued April 21 at 2:57PM CDT until April 21 at 6:15PM CDT by NWS Austin/San Antonio TX

Apr 21, 2:57 PM → Apr 21, 6:15 PM

WHAT: Urban and small stream flooding caused by excessive
rainfall continues.

WHERE: Williamson County

WHEN: Until 615 PM CDT.

IMPACTS: Minor flooding in low-lying and poor drainage areas.
Dangerous flows over low-water crossings. Water over roadways.

ADDITIONAL DETAILS:
- At 256 PM CDT, Doppler radar and automated rain gauges
indicated heavy rain due to thunderstorms. This is causing
urban and small stream flooding. Between 2 and 4.5 inches of
rain have fallen.
- Additional rainfall amounts up to 1 inch are expected over
the area. This additional rain will result in minor flooding.
- Some locations that will experience flooding include...
Austin, Round Rock, Cedar Park, Georgetown, Pflugerville,
Taylor, Granger, Serenada, Windemere, Anderson Mill, Leander,
Hutto, Bartlett, Liberty Hill, Jarrell, Florence, Thrall,
Weir, Georgetown Dam and Sun City.
- http://www.weather.gov/safety/flood