Today | Weather | Friday, September 18, 2026

Active Weather Warnings

Air Quality Alert

Weather in Flower Mound, Texas

08:25 AM

Now

81° F

Feels Like 84°

Precipitation 0 %

Wind 6 mph

UV Index (0 - 11+) 1

Humidity 71 %

Today

Day 97°

Night 77°

Precipitation 1 %

Wind 7 mph

UV Index (0 - 11+) 7

Flower Mound Weather Forecast Updated

22 minutes ago

Last updated on September 18, 2026 at 8:03 AM

Weather Forecast History

Last Year's Weather on This Day (September 18, 2025)

Day

99°

Night

72°

Wind

6 mph

UV Index

Precipitation

55 %

Air Quality in Flower Mound

NOW

23 AQI

Good air quality Dominant pollutant: O₃

Pollutant Concentrations:

PM_2.5 3.15 µg/m³

PM₁₀ 3.68 µg/m³

O₃ 0.024 ppm

NO₂ 1.5 ppb

SO₂ 0.1 ppb

CO 0.13 ppm

NH₃ 0.35 µg/m³

NO 0.01 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 – 3.15 µg/m³

PM₁₀ – 3.68 µg/m³

O₃ – 47.78 µg/m³

NO₂ – 2.78 µg/m³

SO₂ – 0.32 µg/m³

CO – 143.82 µg/m³

NH₃ – 0.35 µg/m³

NO – 0.01 µg/m³

View Hourly Air Quality Forecast

Weather Alerts and Warnings for Flower Mound

Air Quality Alert

Air Quality Alert issued September 17 at 4:08PM CDT by NWS Fort Worth TX

Sep 17, 4:08 PM → Sep 18, 7:15 PM

AQAFWD

The Texas Commission on Environmental Quality (TCEQ) has issued
an Ozone Action Day for the Dallas-Fort Worth area for Friday,
September 18, 2026.

Atmospheric conditions are expected to be favorable for producing
high levels of ozone air pollution in the Dallas-Fort Worth area
on Friday. You can help prevent ozone pollution by sharing a
ride, walking, riding a bicycle, taking your lunch to work,
avoiding drive-through lanes, conserving energy, and keeping your
vehicle properly tuned.

For more information on ozone:

Ozone: The Facts (www.tceq.texas.gov/goto/ozonefacts)

Air North Texas: (www.airnorthtexas.org)

EPA Air Now
(www.airnow.gov/index.cfm?action.local_state&STATEID=45&TAB=0)

Take care of Texas (www.takecareoftexas.org)

North Central Texas Council of Governments Air Quality
(www.nctcog.org/trans/air/index.asp)

Updated: Sep 18, 8:03 AM Source: NWS Alert