Air Quality in Roy, United States

Windy
37.7°C · 9.9% humidity
37.7°
Feels 37.7°
67
Moderate
Unusually sensitive people should consider reducing prolonged outdoor exertion.
3 stations

Nearby Monitoring Stations

AQI Forecast
25 11am
25
25
67 2pm
56
48
42 5pm
38
35
30 8pm
31
30
29 11pm
28
28
28 2am
28
27
27 5am
27
27
27 8am
27
27
AD 728×90

Air Quality Index Trend

45h · 6 stn

Roy'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 Roy is 1.3× the WHO 24-hour guideline of 15 µg/m³.

9.9%
Humidity
58.4 km/h
Wind WSW
1006.0 hPa
Pressure
24.9
UV Extreme
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
67
19.55 µg/m³
PM10
13
13.7 µg/m³
050100150200300500

What is the weather forecast for Roy?

Temperature & Precipitation

PM2.5 Trend

45h · 6 stations
PM2.519.55 µg/m³ ×1.3 WHO
Moderate
PM1013.7 µg/m³
Good
UV INDEX24.9
Extreme
AD 300×250
Station readings (3 stations within 25 km)
19.55
Median
18.23
Average
11.0
Low
23.0
High
PM2.5 µg/m³ · Model: 6.25 · Bias: -13.3

What is the 7-day forecast for Roy?

07-21
38.9° 20.3°
07-22
38.1° 18.8°
0.25 mm
07-23
37.0° 22.8°
0.13 mm
07-24
37.5° 22.7°
07-25
38.0° 20.0°
0.44 mm
07-26
36.6° 16.4°
07-27
35.3° 21.2°
Both models agree Avg diff: 4.4°C

Where are air quality stations near Roy?

31
Harrisville, Weber, Utah
16.0 km PM2.5: 7.4 µg/m³
29
Davis, Utah
22.8 km PM2.5: 7.0 µg/m³

What cities are near Roy?

67 Clearfield 69 South Ogden 68 Ogden 68 Syracuse 72 Layton 73 Kaysville 48 North Ogden 74 Centerville 74 Bountiful 66 North Salt Lake
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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 2026-07-21T20:01 UTC.