Today | Weather | Thursday, December 18, 2025

Weather in Mesa, Arizona

12:00 PM
Now
Sunny Weather
70° F
Feels Like 73°
Precipitation 0 %
Wind 4 mph
UV Index (0 - 11+) 3
Humidity 29 %
Today
Cloudy Weather
Day 73°
Night 46°
Precipitation 0 %
Wind 4 mph
UV Index (0 - 11+) 3

Mesa Weather Forecast Updated

24 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (December 18, 2024)
Sunny Weather

Day

82°

Night

48°

Wind

4 mph

UV Index

3

Precipitation

0 %

Air Quality in Mesa

NOW
92 AQI
Moderate air quality Dominant pollutant: PM2.5

Pollutant Concentrations:

PM2.5 31.73 µg/m³
PM10 80.78 µg/m³
O3 0.054 ppm
NO2 1.2 ppb
SO2 0.3 ppb
CO 0.15 ppm
NH3 2.41 µg/m³
NO 0.4 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 acceptable; however, for some pollutants, there may be a moderate health concern for a very small number of people who are unusually sensitive to air pollution.

Show raw pollutant concentrations (µg/m³)
PM2.531.73 µg/m³
PM1080.78 µg/m³
O3105.89 µg/m³
NO22.26 µg/m³
SO20.66 µg/m³
CO176 µg/m³
NH32.41 µg/m³
NO0.4 µg/m³