Air quality index85Moderate

Acceptable for most people; unusually sensitive people should take it easier outdoors.

Next 24 hours

US AQI

89Now
86
73
608 PM
47
47
4711 PM
47
47
472 AM
47
45
435 AM
41
41
408 AM
39
49
5911 AM
69
75
822 PM
88
88

Air quality outlook

Worst hour each day

Today94Moderate
Thu 888Moderate
Fri 949Good
Sat 1045Good
Sun 1141Good

From our air-quality forecast models (GEOS-CF / GEFS aerosols). AQI uses the US EPA scale.

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About Tempe weather

Tempe is in Maricopa County, Arizona, United States at 33.41°, -111.91°. Right now it’s 100° and mostly clear; today’s high is 100° with a 1% chance of rain.

Arizona is known for its arid desert climate, particularly in the southern lowlands where Phoenix regularly ranks as one of the hottest cities in the United States. Summer temperatures in the Sonoran Desert routinely exceed 110 degrees Fahrenheit, and the city has recorded stretches of consecutive days above 100 degrees lasting over a month. Despite the heat, humidity remains very low for most of the year.