Air Quality in Fort Collins, United States

Windy
34.6°C · 16.8% humidity
34.6°
Feels 34.6°
68
Moderate
Unusually sensitive people should consider reducing prolonged outdoor exertion.
4 stations

Nearby Monitoring Stations

AQI Forecast
25 8am
25
25
68 11am
56
47
41 2pm
36
33
31 5pm
29
28
27 8pm
27
26
28 11pm
28
27
27 2am
27
27
27 5am
27
27
AD 728×90

Air Quality Index Trend

46h · 7 stn

Fort Collins's air quality is primarily affected by vehicle emissions and industrial activity. Seasonal wildfire smoke and weather patterns can cause periodic air quality deterioration. Current PM2.5 concentration in Fort Collins is 1.4× the WHO 24-hour guideline of 15 µg/m³.

16.8%
Humidity
46.6 km/h
Wind SSE
1008.8 hPa
Pressure
19.9
UV Extreme
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
68
20.45 µg/m³
PM10
13
13.7 µg/m³
050100150200300500

What is the weather forecast for Fort Collins?

Temperature & Precipitation

PM2.5 Trend

46h · 7 stations
PM2.520.45 µg/m³ ×1.4 WHO
Moderate
PM1013.7 µg/m³
Good
UV INDEX19.9
Extreme
AD 300×250
Station readings (4 stations within 25 km)
20.45
Median
20.14
Average
19.0
Low
20.54
High
PM2.5 µg/m³ · Model: 6.0 · Bias: -14.4

What is the 7-day forecast for Fort Collins?

07-21
34.6° 18.5°
2.63 mm
07-22
36.0° 15.4°
07-23
25.1° 14.9°
0.44 mm
07-24
33.9° 17.8°
0.56 mm
07-25
36.5° 17.4°
0.44 mm
07-26
31.3° 18.8°
3.75 mm
07-27
36.4° 16.6°
Both models agree Avg diff: 4.6°C

Where are air quality stations near Fort Collins?

69
FTW1
4.9 km PM2.5: 20.5 µg/m³
69
FTW2
4.9 km PM2.5: 20.5 µg/m³
69
FTW3
4.9 km PM2.5: 20.5 µg/m³
–
Fossil Creek
12.7 km
66
Timnath - Bethke Elementary
13.8 km PM2.5: 19.0 µg/m³ PM10: 38.0 µg/m³

What cities are near Fort Collins?

67 Loveland 66 Greeley 68 Evans 58 Longmont 65 Erie 73 Boulder 25 Cheyenne 65 Louisville 65 Broomfield 64 Northglenn
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Data sources: AQI from ground-level monitoring stations via AQICN. Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-07-21T17:15 UTC.