What is the air quality in Walnut today?

The current Air Quality Index (AQI) in Walnut is 50 (Good). PM2.5 concentration is 12.0 µg/m³.

What is the temperature in Walnut right now?

The current temperature in Walnut is 29.6°C (feels like 29.6°C). Humidity is 9.0% and wind speed is 36.2 km/h.

Is it safe to go outside in Walnut?

Air quality is satisfactory. Enjoy outdoor activities. The UV Index is 0.0 (Low).

Air Quality in Walnut, United States

Clear

29.6°C · 9.0% humidity

29.6°

Feels 29.6°

Good

Air quality is satisfactory. Enjoy outdoor activities.

1 station

Nearby Monitoring Stations

AQI Forecast

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Station readings

Air Quality Index Trend

46h · 1 stn

View full history →

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.

9.0%

Humidity

36.2 km/h

Wind SSW

1017.7 hPa

Pressure

0.0

UV Low

GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5

12.0 µg/m³

PM10▲

54.9 µg/m³

050100150200300500

What is the weather forecast for Walnut?

Temperature & Precipitation

PM2.5 Trend

46h · 1 station

PM2.512.0 µg/m³ ✓ WHO

Good

PM1054.9 µg/m³

Moderate

UV INDEX0.0

Low

Station readings (1 station within 25 km)

12.0

Median

12.0

Average

12.0

Low

12.0

High

PM2.5 µg/m³ · Model: 19.2 · Bias: +7.2

What is the 7-day forecast for Walnut?

10-20

29.6° 16.8°

10-21

22.7° 13.4°

10-22

27.8° 16.0°

10-23

23.4° 14.8°

10-24

23.1° 12.7°

0.25 mm

10-25

24.7° 6.9°

10-26

23.6° 13.5°

1.63 mm

Both models agree Avg diff: 4.3°C

Where are air quality stations near Walnut?

Glendora-Laurel, Los Angeles

13.9 km PM2.5: 12.0 µg/m³

united-states-of-america-san-marino-sierra-madre-boulevard

25.2 km 33.9°C 32.0% RH PM2.5: 5.0 µg/m³ PM10: 5.0 µg/m³

What cities are near Walnut?

42 South San Jose Hills 50 Diamond Bar 46 Rowland Heights 38 Valinda 37 La Puente 47 Covina 38 West Covina 38 Hacienda Heights 37 West Puente Valley 40 Vincent

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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 2026-10-20T20:55 UTC.