Air Quality in Walnut Creek, United States

Clear
25.9°C · 35.1% humidity
25.9°
Feels 25.9°
68
Moderate
Unusually sensitive people should consider reducing prolonged outdoor exertion.
Model forecast

Nearby Monitoring Stations

AQI Forecast
54 4pm
54
54
68 7pm
64
61
59 10pm
58
57
56 1am
55
55
55 4am
34
34
34 7am
34
34
34 10am
34
34
54 1pm
54
54
AD 728×90

Air Quality Index Trend

45h · 93 stn

Walnut Creek'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 Walnut Creek is 1.4× the WHO 24-hour guideline of 15 µg/m³.

35.1%
Humidity
30.6 km/h
Wind W
1010.2 hPa
Pressure
17.4
UV Extreme
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
68
20.3 µg/m³
PM10
56
66.15 µg/m³
050100150200300500

What is the weather forecast for Walnut Creek?

Temperature & Precipitation

PM2.5 Trend

45h · 93 stations
PM2.520.3 µg/m³ ×1.4 WHO
Moderate
PM1066.15 µg/m³
Moderate
UV INDEX17.4
Extreme
AD 300×250

What is the 7-day forecast for Walnut Creek?

08-03
31.9° 14.5°
08-04
26.0° 16.3°
08-05
29.9° 14.9°
08-06
31.7° 15.2°
08-07
26.2° 17.6°
08-08
31.2° 14.5°
08-09
30.9° 14.7°
Both models agree Avg diff: 2.2°C

Where are air quality stations near Walnut Creek?

53
Concord, Contra Costa, California
4.7 km PM2.5: 13.1 µg/m³
42
Concord, Contra Costa, California
4.7 km PM2.5: 10.1 µg/m³
27
Martinez 3
12.3 km PM2.5: 6.4 µg/m³
30
Berkeley-Martinez 1
13.2 km PM2.5: 7.2 µg/m³
53
Skyline HS
14.5 km PM2.5: 13.0 µg/m³
74
Thornhill ES
15.0 km PM2.5: 23.1 µg/m³
39
Montera MS/Joaquin Miller ES
15.4 km PM2.5: 9.3 µg/m³
38
Montclair ES
15.5 km PM2.5: 9.0 µg/m³
62
Lawrence Hall of Science
16.2 km PM2.5: 17.2 µg/m³
28
Lawrence Hall of Science
16.3 km PM2.5: 6.7 µg/m³

What cities are near Walnut Creek?

68 Pleasant Hill 96 Moraga 96 Orinda 96 Martinez 68 San Ramon 68 Bay Point 96 Benicia 4 Berkeley 68 Pittsburg 4 Oakland
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Data sources: Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-08-08T02:11 UTC.