Air Quality in Walnut, United States

Clear
18.7°C · 30.4% humidity
18.7°
Feels 18.7°
43
Good
Air quality is satisfactory. Enjoy outdoor activities.
1 station

Nearby Monitoring Stations

AQI Forecast Calibrated
33 5pm
33
33
43 8pm
40
38
37 11pm
36
35
34 2am
34
34
33 5am
33
33
33 8am
33
33
33 11am
33
33
33 2pm
33
33
Station readings
25
25
21
33
CAMS model adj -21
54
54
54
54
54
54
54
54
54
54
54
54
54
54
54
54
54
54
54
54
54
54
54
54
AD 728×90

Air Quality Index Trend

48h · 1 stn

Walnut's air quality is primarily affected by vehicle emissions and industrial activity. Seasonal wildfire smoke and weather patterns can cause periodic air quality deterioration.

30.4%
Humidity
30.9 km/h
Wind N
1011.3 hPa
Pressure
0.7
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
43
10.3 µg/m³
PM10
25
27.4 µg/m³
050100150200300500

What is the weather forecast for Walnut?

Temperature & Precipitation

PM2.5 Trend

48h · 1 station
PM2.510.3 µg/m³ ✓ WHO
Good
PM1027.4 µg/m³
Good
UV INDEX0.7
Low
AD 300×250
Station readings (1 station within 25 km)
10.3
Median
10.3
Average
10.3
Low
10.3
High
PM2.5 µg/m³ · Model: 10.85 · Bias: +0.6

What is the 7-day forecast for Walnut?

06-09
27.8° 13.9°
06-10
29.4° 15.5°
06-11
26.5° 15.5°
06-12
29.9° 16.2°
0.19 mm
06-13
33.1° 17.1°
06-14
28.2° 19.1°
06-15
25.6° 8.9°
Both models agree Avg diff: 2.7°C

Where are air quality stations near Walnut?

29
Glendora-Laurel, Los Angeles
13.9 km PM2.5: 7.0 µg/m³
39
Glendora-Laurel, Los Angeles
13.9 km PM2.5: 9.4 µg/m³
14
Glendora-Laurel, Los Angeles
13.9 km PM2.5: 3.4 µg/m³
24
Glendora-Laurel, Los Angeles
13.9 km PM2.5: 5.8 µg/m³
22
Glendora-Laurel, Los Angeles
13.9 km PM2.5: 5.3 µg/m³
33
united-states-of-america-san-marino-sierra-madre-boulevard
25.2 km 26.0°C 44.0% RH PM2.5: 8.0 µg/m³ PM10: 9.0 µg/m³

What cities are near Walnut?

39 South San Jose Hills 43 Diamond Bar 44 Rowland Heights 36 Valinda 37 La Puente 41 Covina 36 West Covina 38 Hacienda Heights 37 West Puente Valley 37 Vincent
Get AQI alerts for Walnut

Notify me when air quality reaches:

Free · No account · Unsubscribe any time

Data sources: AQI from ground-level monitoring stations via AQICN. Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-06-09T03:32 UTC.