Today | Weather | Wednesday, May 20, 2026

Weather in Mesa, Arizona

02:17 AM
Now
Cloudy Night
70° F
Feels Like 68°
Precipitation 0 %
Wind 5 mph
Humidity 14 %
Today
Cloudy Weather
Day 93°
Night 66°
Precipitation 1 %
Wind 7 mph
UV Index (0 - 11+) 11

Warning: Extreme UV Index Today: 11

Overexposure to the sun's harmful UV rays can cause sunburn and increase the risk of developing skin cancer, including melanoma. Protect yourself by wearing clothing that covers your skin, sunglasses, and a hat. Apply a broad-spectrum sunscreen with an SPF of 30 or higher every two hours, even on cloudy days. Minimize direct sun exposure during peak hours (10 AM to 4 PM) to reduce the risk.

Mesa Weather Forecast Updated

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

Day

99°

Night

66°

Wind

6 mph

UV Index

11

Precipitation

0 %

Air Quality in Mesa

NOW
61 AQI
Moderate air quality Dominant pollutant: PM10

Pollutant Concentrations:

PM2.5 14.71 µg/m³
PM10 76.89 µg/m³
O3 0.050 ppm
NO2 0.4 ppb
SO2 0 ppb
CO 0.10 ppm
NH3 2.41 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 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)
PM2.514.71 µg/m³
PM1076.89 µg/m³
O397.47 µg/m³
NO20.67 µg/m³
SO20.1 µg/m³
CO116.89 µg/m³
NH32.41 µg/m³
NO0 µg/m³