Air quality index64Moderate

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

Next 24 hours

US AQI

75Now
65
55
5311 PM
51
49
562 AM
63
71
675 AM
64
61
458 AM
29
14
3311 AM
52
71
732 PM
76
78
725 PM
65
59

Air quality outlook

Worst hour each day

Today94Moderate
Fri 978Moderate
Sat 1053Moderate
Sun 11500Hazardous
Mon 1243Good

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

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About Thornton weather

Thornton is in Adams County, Colorado, United States at 39.87°, -104.97°. Right now it’s 76° and partly cloudy; today’s high is 85° with a 1% chance of rain.

Colorado's climate is defined by dramatic elevation changes, from the eastern plains at around 3,500 feet to over 50 peaks exceeding 14,000 feet in the Rocky Mountains. Denver, known as the Mile High City, enjoys over 300 days of sunshine per year and has a semi-arid climate with low humidity. Temperature swings of 40 degrees or more in a single day are not uncommon along the Front Range.