Today | Weather | Wednesday, October 7, 2026

Weather in Fort Collins, Colorado

10:32 PM
Now
Cloudy Night
57° F
Feels Like 55°
Precipitation 25 %
Wind 7 mph
Humidity 50 %
Today
Rainy Night
Day 79°
Night 52°
Precipitation 70 %
Wind 6 mph

Fort Collins Weather Forecast Updated

43 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (October 7, 2025)
Night

Day

59°

Night

39°

Wind

5 mph

Precipitation

4 %

Air Quality in Fort Collins

NOW
27 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 2.92 µg/m³
PM10 3.36 µg/m³
O3 0.029 ppm
NO2 2.4 ppb
SO2 0 ppb
CO 0.09 ppm
NH3 0.26 µg/m³
NO 0 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)
PM2.5 – 2.92 µg/m³
PM10 – 3.36 µg/m³
O3 – 56.62 µg/m³
NO2 – 4.45 µg/m³
SO2 – 0.11 µg/m³
CO – 97.76 µg/m³
NH3 – 0.26 µg/m³
NO – 0 µg/m³