Today | Weather | Friday, March 20, 2026

Weather in Decatur, Alabama

12:54 AM
Now
Cloudy Night
59° F
Feels Like 57°
Precipitation 0 %
Wind 7 mph
Humidity 80 %
Today
Cloudy Weather
Day 77°
Night 55°
Precipitation 0 %
Wind 9 mph
UV Index (0 - 11+) 6

Decatur Weather Forecast Updated

Last updated on
Weather Forecast History
Last Year's Weather on This Day (March 20, 2025)

Day

63°

Night

34°

Air Quality in Decatur

NOW
37 AQI
Good air quality Dominant pollutant: PM2.5

Pollutant Concentrations:

PM2.5 8.77 µg/m³
PM10 13.23 µg/m³
O3 0.032 ppm
NO2 3.6 ppb
SO2 0.2 ppb
CO 0.17 ppm
NH3 1.01 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)
PM2.58.77 µg/m³
PM1013.23 µg/m³
O363.25 µg/m³
NO26.72 µg/m³
SO20.42 µg/m³
CO194.21 µg/m³
NH31.01 µg/m³
NO0 µg/m³