Today | Weather | Sunday, September 21, 2025

Weather in Tucson, Arizona

08:52 PM

Now

73° F

Feels Like 73°

Precipitation 49 %

Wind 6 mph

Humidity 77 %

Today

Day 95°

Night 70°

Precipitation 55 %

Wind 10

Tucson Weather Forecast Updated

Last updated on September 21, 2025 7:25 PM

Last Year's Weather on This Day (September 21, 2024)

86°

63°

6 mph

NOW

42 AQI

Good air quality Dominant pollutant: O3

PM2.5 6.35 µg/m³

PM10 17.04 µg/m³

O₃ 42.46 ppb

NO₂ 1.79 ppb

SO₂ 0.44 ppb

CO 111.09 ppb

PM_2.5 – Fine particles <2.5μm

PM₁₀ – Inhalable particles <10μm

O₃ – Ozone

NO₂ – Nitrogen dioxide

SO₂ – Sulfur dioxide

CO – Carbon monoxide

With this level of air quality, you have no limitations. Enjoy the outdoors