Today | Weather | Tuesday, March 17, 2026

Active Weather Warnings

Freeze Warning

Weather in Lewisville, Texas

02:24 AM

Now

37° F

Feels Like 32°

Precipitation 0 %

Wind 8 mph

Humidity 49 %

Today

Day 66°

Night 48°

Precipitation 0 %

Wind 16 mph

UV Index (0 - 11+) 6

Lewisville Weather Forecast Updated

Last updated on March 17, 2026 at 1:17 AM

Weather Forecast History

Last Year's Weather on This Day (March 17, 2025)

Day

86°

Night

59°

Wind

15 mph

UV Index

Precipitation

0 %

Air Quality in Lewisville

NOW

26 AQI

Good air quality Dominant pollutant: O₃

Pollutant Concentrations:

PM_2.5 2.36 µg/m³

PM₁₀ 3.53 µg/m³

O₃ 0.028 ppm

NO₂ 3.4 ppb

SO₂ 0.1 ppb

CO 0.17 ppm

NH₃ 10.65 µg/m³

NO 0 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 – 2.36 µg/m³

PM₁₀ – 3.53 µg/m³

O₃ – 55.81 µg/m³

NO₂ – 6.35 µg/m³

SO₂ – 0.16 µg/m³

CO – 189.6 µg/m³

NH₃ – 10.65 µg/m³

NO – 0 µg/m³

View Hourly Air Quality Forecast

Weather Alerts and Warnings for Lewisville

Moderate Expected Likely

Freeze Warning

Freeze Warning issued March 16 at 11:52AM CDT until March 17 at 9:00AM CDT by NWS Fort Worth TX

Mar 17, 3:00 AM → Mar 17, 9:00 AM

WHAT: Sub-freezing temperatures as low as 26 expected.

WHERE: North and Central Texas

WHEN: From 3 AM to 9 AM CDT Tuesday.

IMPACTS: Frost and freeze conditions could kill crops, other
sensitive vegetation and possibly damage unprotected outdoor
plumbing.

ADDITIONAL DETAILS: Highly urban areas like DFW may hover just
above freezing overnight in some areas.

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Take steps now to protect tender plants from the cold. Freeze Warnings are issued in the spring when a late-season freeze is expected after the growing season has begun. Frost and freeze conditions will damage unprotected vegetation that is sensitive to freezing temperatures.

Updated: Mar 17, 1:17 AM Source: NWS Alert