Today | Weather | Wednesday, March 18, 2026

Weather in Tucson, Arizona

07:59 PM
Now
Cloudy Night
84° F
Feels Like 82°
Precipitation 0 %
Wind 6 mph
Humidity 11 %
Today
Night
Day 95°
Night 68°
Precipitation 0 %
Wind 5 mph

Tucson Weather Forecast Updated

4 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (March 18, 2025)
Sunny Weather

Day

64°

Night

41°

Wind

12 mph

UV Index

7

Precipitation

1 %

Air Quality in Tucson

NOW
44 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 2.24 µg/m³
PM10 5.01 µg/m³
O3 0.047 ppm
NO2 0.5 ppb
SO2 0.1 ppb
CO 0.08 ppm
NH3 1.03 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)
PM2.52.24 µg/m³
PM105.01 µg/m³
O393.09 µg/m³
NO20.99 µg/m³
SO20.33 µg/m³
CO93.62 µg/m³
NH31.03 µg/m³
NO0 µg/m³