What is the air quality in Walnut today?

The current Air Quality Index (AQI) in Walnut is 24 (Good). PM2.5 concentration is 5.73 µg/m³.

What is the temperature in Walnut right now?

The current temperature in Walnut is 14.1°C (feels like 14.1°C). Humidity is 62.8% and wind speed is 45.7 km/h.

Is it safe to go outside in Walnut?

Air quality is satisfactory. Enjoy outdoor activities. The UV Index is 0 (Low).

Air Quality in Walnut, United States

Drizzle

14.1°C · 62.8% humidity

14.1°

Feels 14.1°

Good

Air quality is satisfactory. Enjoy outdoor activities.

Calibrated model

Nearby Monitoring Stations

AQI Forecast Calibrated

47 9pm

18 12am

41 3am

41 6am

41 9am

41 12pm

41 3pm

16 6pm

Station readings

CAMS model adj -34

PM2.5 Trend (24h)

33h · 2 stations

62.8%

Humidity

45.7 km/h

Wind SSW

1010.9 hPa

Pressure

0.7

UV Low

GoodModerateUSGUnhealthyVery UnhealthyHazardous

What is the weather forecast for Walnut?

Temperature & Precipitation

PM2.55.73 µg/m³ ✓ WHO

Good

PM1034.3 µg/m³

Good

UV INDEX0.7

Low

What is the 7-day forecast for Walnut?

04-10

14.1° 8.6°

12.31 mm

04-11

10.5° 6.8°

19.81 mm

04-12

7.9° 3.7°

0.88 mm

04-13

11.9° 3.3°

0.19 mm

04-14

17.9° 7.2°

04-15

19.8° 12.0°

04-16

21.5° 12.8°

Both models agree Avg diff: 4.9°C

Where are air quality stations near Walnut?

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

25.2 km 28.7°C 43.0% RH PM2.5: 8.0 µg/m³ PM10: 9.0 µg/m³

What cities are near Walnut?

47 South San Jose Hills 27 Diamond Bar 42 Rowland Heights 46 Valinda 46 La Puente 47 Covina 46 West Covina 45 Hacienda Heights 46 West Puente Valley 46 Vincent

Data sources: AQI from ground-level monitoring stations via AQICN. Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-04-10T00:40 UTC.