Today | Weather | Saturday, August 29, 2026

Weather in Fort Collins, Colorado

06:06 PM
Now
Sunny with a Chance of Thunderstorms
81° F
Feels Like 77°
Precipitation 48 %
Wind 10 mph
UV Index (0 - 11+) 1
Humidity 40 %
Today
Sunny with a Chance of Thunderstorms
Day 88°
Night 63°
Precipitation 89 %
Wind 8 mph
UV Index (0 - 11+) 3

Fort Collins Weather Forecast Updated

14 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (August 29, 2025)
Rainy Night

Day

79°

Night

59°

Wind

7 mph

Precipitation

55 %

Air Quality in Fort Collins

NOW
32 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 1.94 µg/m³
PM10 3.17 µg/m³
O3 0.034 ppm
NO2 0.4 ppb
SO2 0 ppb
CO 0.06 ppm
NH3 0.32 µg/m³
NO 0.05 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)
PM2.51.94 µg/m³
PM103.17 µg/m³
O367.36 µg/m³
NO20.8 µg/m³
SO20.09 µg/m³
CO68.84 µg/m³
NH30.32 µg/m³
NO0.05 µg/m³