Today | Weather | Saturday, July 18, 2026

Weather in Tempe, Arizona

07:54 AM
Now
Cloudy Weather
81° F
Feels Like 84°
Precipitation 37 %
Wind 7 mph
UV Index (0 - 11+) 1
Humidity 71 %
Today
Sunny with a Chance of Thunderstorms
Day 97°
Night 81°
Precipitation 55 %
Wind 7 mph
UV Index (0 - 11+) 8

Warning: High UV Index Today: 8

High risk of harm from unprotected sun exposure. Take precautions: wear a hat, sunglasses, and apply sunscreen regularly if you’ll be outdoors for extended periods.

Tempe Weather Forecast Updated

Last updated on
Weather Forecast History
Last Year's Weather on This Day (July 18, 2025)
Sunny with a Chance of Thunderstorms

Day

106°

Night

82°

Wind

4 mph

UV Index

12

Precipitation

40 %

Air Quality in Tempe

NOW
24 AQI
Good air quality Dominant pollutant: PM2.5

Pollutant Concentrations:

PM2.5 5.66 µg/m³
PM10 26.1 µg/m³
O3 0.021 ppm
NO2 0.4 ppb
SO2 0 ppb
CO 0.08 ppm
NH3 1.08 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)
PM2.55.66 µg/m³
PM1026.1 µg/m³
O341.62 µg/m³
NO20.76 µg/m³
SO20.05 µg/m³
CO89.78 µg/m³
NH31.08 µg/m³
NO0.03 µg/m³