Air Quality in Rancho Cucamonga, United States

Windy
31.9°C · 20.5% humidity
31.9°
Feels 31.9°
68
Moderate
Unusually sensitive people should consider reducing prolonged outdoor exertion.
Model forecast

Nearby Monitoring Stations

AQI Forecast
54 1pm
54
54
68 4pm
64
61
59 7pm
58
57
56 10pm
55
55
55 1am
54
54
54 4am
66
66
66 7am
66
54
54 10am
54
54
AD 728×90

Air Quality Index Trend

46h · 11 stn

Rancho Cucamonga'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 Rancho Cucamonga is 1.4× the WHO 24-hour guideline of 15 µg/m³.

20.5%
Humidity
54.2 km/h
Wind S
1011.3 hPa
Pressure
17.4
UV Extreme
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
68
20.3 µg/m³
PM10
56
66.15 µg/m³
050100150200300500

What is the weather forecast for Rancho Cucamonga?

Temperature & Precipitation

PM2.5 Trend

46h · 11 stations
PM2.520.3 µg/m³ ×1.4 WHO
Moderate
PM1066.15 µg/m³
Moderate
UV INDEX17.4
Extreme
AD 300×250

What is the 7-day forecast for Rancho Cucamonga?

08-03
34.0° 19.8°
08-04
29.0° 19.9°
0.56 mm
08-05
33.7° 19.5°
0.31 mm
08-06
34.0° 16.6°
08-07
31.5° 17.9°
08-08
29.5° 15.2°
08-09
33.5° 15.1°
Both models agree Avg diff: 4.2°C

Where are air quality stations near Rancho Cucamonga?

84
Rubidoux - Mission Blvd, Riverside
20.2 km PM2.5: 27.8 µg/m³
74
Rubidoux - Mission Blvd, Riverside
20.2 km PM2.5: 23.0 µg/m³
94
Glendora-Laurel, Los Angeles
24.1 km PM2.5: 32.5 µg/m³
51
Glendora-Laurel, Los Angeles
24.1 km PM2.5: 12.1 µg/m³
90
Glendora-Laurel, Los Angeles
24.1 km PM2.5: 30.6 µg/m³
53
San Bernardino
24.6 km PM2.5: 12.9 µg/m³
48
4001 Iowa Ave Riverside CA
27.5 km PM2.5: 11.6 µg/m³
48
Emerbee's
28.4 km PM2.5: 11.6 µg/m³
32
C&C Center
29.2 km PM2.5: 7.6 µg/m³

What cities are near Rancho Cucamonga?

60 Upland 60 Ontario 68 Claremont 60 Chino 60 Jurupa Valley 60 Glen Avon 60 Fontana 68 Pomona 69 La Verne 60 Eastvale
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Data sources: Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-08-07T23:59 UTC.