Air Quality in Rancho Cucamonga, United States

Windy
31.3°C · 15.3% humidity
31.3°
Feels 31.3°
29
Good
Air quality is satisfactory. Enjoy outdoor activities.
2 stations

Nearby Monitoring Stations

AQI Forecast
34 12pm
34
34
29 3pm
50
51
25 6pm
33
33
33 9pm
34
34
34 12am
34
54
54 3am
54
54
54 6am
54
54
54 9am
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 1.4× the WHO annual guideline of 5 µg/m³.

15.3%
Humidity
58.6 km/h
Wind SSW
1011.4 hPa
Pressure
12.9
UV Extreme
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
29
7.01 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
PM2.57.01 µg/m³ ✓ WHO
Good
PM1027.4 µg/m³
Good
UV INDEX12.9
Extreme
AD 300×250
Station readings (2 stations within 25 km)
7.01
Median
6.72
Average
5.23
Low
8.2
High
PM2.5 µg/m³ · Model: 10.85 · Bias: +3.8

What is the 7-day forecast for Rancho Cucamonga?

05-28
27.5° 13.6°
05-29
31.3° 13.7°
05-30
19.1° 9.9°
05-31
28.3° 16.5°
06-01
31.2° 11.7°
06-02
28.1° 9.2°
06-03
28.4° 6.7°
Both models agree Avg diff: 4.8°C

Where are air quality stations near Rancho Cucamonga?

46
Rubidoux - Mission Blvd, Riverside
20.2 km PM2.5: 11.0 µg/m³
75
Rubidoux - Mission Blvd, Riverside
20.2 km PM2.5: 23.5 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
36
Glendora-Laurel, Los Angeles
24.1 km PM2.5: 8.6 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
22
San Bernardino
24.6 km PM2.5: 5.2 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?

34 Upland 34 Ontario 34 Claremont 34 Chino 25 Jurupa Valley 27 Glen Avon 24 Fontana 34 Pomona 45 La Verne 24 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 2026-05-28T22:54 UTC.