Air quality index53Moderate

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

Next 24 hours

US AQI

56Now
53
54
543 AM
55
56
586 AM
59
59
599 AM
59
61
6312 PM
65
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673 PM
69
71
746 PM
77
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679 PM
63
58

Air quality outlook

Worst hour each day

Today77Moderate
Fri 982Moderate
Sat 1053Moderate
Sun 1149Good
Mon 1242Good

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

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About Fort Collins weather

Fort Collins is in Larimer County, Colorado, United States at 40.59°, -105.08°. Right now it’s 55° and clear; today’s high is 84° with a 2% 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.