Air Quality in Rancho Cucamonga, United States

Windy
31.3°C · 15.3% humidity
31.3°
Feels 31.3°
25
Good
Air quality is satisfactory. Enjoy outdoor activities.
4 stations

Nearby Monitoring Stations

AQI Forecast
34 11am
34
34
25 2pm
28
49
51 5pm
25
32
33 8pm
33
33
34 11pm
34
34
54 2am
54
54
54 5am
54
54
54 8am
54
54
AD 728×90

Air Quality Index Trend

48h · 1 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 1.2× the WHO annual guideline of 5 µg/m³.

15.3%
Humidity
58.6 km/h
Wind SSW
1011.4 hPa
Pressure
19.9
UV Extreme
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
25
6.13 µg/m³
PM10
25
27.4 µg/m³
050100150200300500

What is the weather forecast for Rancho Cucamonga?

Temperature & Precipitation

PM2.5 Trend

48h · 1 station
PM2.56.13 µg/m³ ✓ WHO
Good
PM1027.4 µg/m³
Good
UV INDEX19.9
Extreme
AD 300×250
Station readings (4 stations within 25 km)
6.13
Median
5.86
Average
2.4
Low
8.6
High
PM2.5 µg/m³ · Model: 8.2 · Bias: +2.1
Both models agree Avg diff: 4.8°C

Where are air quality stations near Rancho Cucamonga?

36
Rubidoux - Mission Blvd, Riverside
20.2 km PM2.5: 8.6 µg/m³
25
Rubidoux - Mission Blvd, Riverside
20.2 km PM2.5: 6.0 µg/m³
31
Glendora-Laurel, Los Angeles
24.1 km PM2.5: 7.4 µg/m³
21
Glendora-Laurel, Los Angeles
24.1 km PM2.5: 5.0 µg/m³
34
Glendora-Laurel, Los Angeles
24.1 km PM2.5: 8.2 µg/m³
10
Glendora-Laurel, Los Angeles
24.1 km PM2.5: 2.4 µg/m³
54
Glendora-Laurel, Los Angeles
24.1 km PM2.5: 13.5 µg/m³
21
San Bernardino
24.6 km PM2.5: 5.0 µg/m³
18
4001 Iowa Ave Riverside CA
27.5 km PM2.5: 4.4 µg/m³
21
Emerbee's
28.4 km PM2.5: 5.0 µg/m³

What cities are near Rancho Cucamonga?

24 Upland 25 Ontario 20 Claremont 20 Chino 26 Jurupa Valley 28 Glen Avon 24 Fontana 20 Pomona 20 La Verne 25 Eastvale
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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 2026-05-28T21:47 UTC.