Today | Weather | Monday, September 21, 2026

Weather in Surprise, Arizona

04:46 PM
Now
Cloudy Weather
99° F
Feels Like 99°
Precipitation 0 %
Wind 8 mph
UV Index (0 - 11+) 1
Humidity 21 %
Today
Cloudy Weather
Day 100°
Night 75°
Precipitation 0 %
Wind 6 mph
UV Index (0 - 11+) 7

Surprise Weather Forecast Updated

58 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (September 21, 2025)
Stormy Weather

Day

100°

Night

79°

Wind

9 mph

Precipitation

55 %

Air Quality in Surprise

NOW
32 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 2.07 µg/m³
PM10 10.81 µg/m³
O3 0.034 ppm
NO2 0.1 ppb
SO2 0 ppb
CO 0.07 ppm
NH3 0.1 µg/m³
NO 0.03 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)
PM2.52.07 µg/m³
PM1010.81 µg/m³
O367.03 µg/m³
NO20.15 µg/m³
SO20.02 µg/m³
CO85.11 µg/m³
NH30.1 µg/m³
NO0.03 µg/m³