Air Quality in Fort Collins, United States

Windy
37.5°C · 7.0% humidity
37.5°
Feels 37.5°
62
Moderate
Unusually sensitive people should consider reducing prolonged outdoor exertion.
5 stations

Nearby Monitoring Stations

AQI Forecast
25 2pm
25
25
62 5pm
52
44
39 8pm
35
31
29 11pm
28
28
27 2am
26
26
26 5am
25
27
25 8am
25
25
25 11am
25
24
AD 728×90

Air Quality Index Trend

46h · 8 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 1.2× the WHO 24-hour guideline of 15 µg/m³.

7.0%
Humidity
73.8 km/h
Wind SW
997.2 hPa
Pressure
5.9
UV High
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
62
17.52 µg/m³
PM10
13
13.7 µg/m³
050100150200300500

What is the weather forecast for Fort Collins?

Temperature & Precipitation

PM2.5 Trend

46h · 8 stations
PM2.517.52 µg/m³ ×1.2 WHO
Moderate
PM1013.7 µg/m³
Good
UV INDEX5.9
High
AD 300×250
Station readings (5 stations within 25 km)
17.52
Median
9.7
Average
6.79
Low
21.1
High
PM2.5 µg/m³ · Model: 5.9 · Bias: -11.6

What is the 7-day forecast for Fort Collins?

06-08
25.7° 15.3°
06-09
37.5° 18.3°
06-10
31.8° 12.6°
0.13 mm
06-11
31.2° 15.1°
06-12
34.7° 14.4°
0.62 mm
06-13
34.1° 15.8°
0.25 mm
06-14
28.5° 20.1°
0.06 mm
Both models agree Avg diff: 5.1°C

Where are air quality stations near Fort Collins?

28
FTW1
4.9 km PM2.5: 6.8 µg/m³
28
FTW2
4.9 km PM2.5: 6.8 µg/m³
28
FTW3
4.9 km PM2.5: 6.8 µg/m³
–
Fossil Creek
12.7 km
29
Timnath - Bethke Elementary
13.8 km PM2.5: 7.0 µg/m³ PM10: 41.0 µg/m³

What cities are near Fort Collins?

42 Loveland 29 Greeley 33 Evans 38 Longmont 33 Erie 21 Boulder 37 Cheyenne 33 Louisville 35 Broomfield 32 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 2026-06-08T23:22 UTC.