Today | Weather | Wednesday, March 18, 2026

Active Weather Warnings

Freeze Warning

Weather in Madison, Alabama

07:20 AM

Now

34° F

Feels Like 34°

Precipitation 1 %

Wind 4 mph

UV Index (0 - 11+) 0

Humidity 64 %

Today

Day 57°

Night 37°

Precipitation 5 %

Wind 8 mph

UV Index (0 - 11+) 2

Madison Weather Forecast Updated

Last updated on March 18, 2026 at 5:32 AM

Weather Forecast History

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

Day

75°

Night

39°

Air Quality in Madison

NOW

26 AQI

Good air quality Dominant pollutant: O₃

Pollutant Concentrations:

PM_2.5 5.84 µg/m³

PM₁₀ 9.78 µg/m³

O₃ 0.028 ppm

NO₂ 4.3 ppb

SO₂ 0.2 ppb

CO 0.19 ppm

NH₃ 1.56 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 – 5.84 µg/m³

PM₁₀ – 9.78 µg/m³

O₃ – 55.59 µg/m³

NO₂ – 8.07 µg/m³

SO₂ – 0.57 µg/m³

CO – 212.62 µg/m³

NH₃ – 1.56 µg/m³

NO – 0 µg/m³

View Hourly Air Quality Forecast

Weather Alerts and Warnings for Madison

Moderate Expected Likely

Freeze Warning

Freeze Warning issued March 17 at 2:41PM CDT until March 18 at 9:00AM CDT by NWS Huntsville AL

Mar 17, 9:00 PM → Mar 18, 9:00 AM

WHAT: Sub-freezing temperatures as low as 27 expected.

WHERE: Portions of north central, northeast, and northwest
Alabama.

WHEN: From 9 PM this evening to 9 AM CDT Wednesday.

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

+ Read More

Take steps now to protect tender plants from the cold.

Updated: Mar 18, 5:32 AM Source: NWS Alert