Air Quality in Fort Collins, United States

Drizzle
11.1°C · 95.9% humidity
11.1°
Feels 11.1°
39
Good
Air quality is satisfactory. Enjoy outdoor activities.
5 stations

Nearby Monitoring Stations

AQI Forecast
27 5am
27
27
39 8am
34
31
29 11am
28
27
27 2pm
26
26
26 5pm
25
25
25 8pm
25
25
25 11pm
27
27
27 2am
27
27
AD 728×90

Air Quality Index Trend

47h · 1 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 1.9× the WHO annual guideline of 5 µg/m³.

95.9%
Humidity
65.4 km/h
Wind SE
1019.0 hPa
Pressure
4.4
UV Moderate
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
39
9.36 µg/m³
PM10
13
13.7 µg/m³
050100150200300500

What is the weather forecast for Fort Collins?

Temperature & Precipitation

PM2.5 Trend

47h · 1 station
PM2.59.36 µg/m³ ✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX4.4
Moderate
AD 300×250
Station readings (5 stations within 25 km)
9.36
Median
9.2
Average
6.0
Low
10.4
High
PM2.5 µg/m³ · Model: 6.25 · Bias: -3.1

What is the 7-day forecast for Fort Collins?

05-29
30.5° 11.1°
19.69 mm
05-30
28.4° 12.4°
0.56 mm
05-31
28.6° 13.9°
2.0 mm
06-01
26.4° 12.3°
06-02
32.7° 14.7°
06-03
32.1° 14.0°
06-04
28.2° 12.5°
4.44 mm
Both models agree Avg diff: 4.3°C

Where are air quality stations near Fort Collins?

42
FTW1
4.9 km PM2.5: 10.2 µg/m³
43
FTW2
4.9 km PM2.5: 10.4 µg/m³
43
FTW3
4.9 km PM2.5: 10.3 µg/m³
–
Fossil Creek
12.7 km
25
Timnath - Bethke Elementary
13.8 km PM2.5: 6.0 µg/m³ PM10: 12.0 µg/m³

What cities are near Fort Collins?

37 Loveland 25 Greeley 25 Evans 41 Longmont 41 Erie 32 Boulder 29 Cheyenne 36 Louisville 35 Broomfield 34 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 2026-05-29T14:36 UTC.