Air Quality in Castro Valley, United States
Cloudy
8.9°C · 86.6% humidity
8.9°
Feels 5.1°
20
Good
Air quality is satisfactory. Enjoy outdoor activities.
65 stations
Nearby Monitoring Stations
AQI Forecast
27
5pm
34
34
20
8pm
24
27
29
11pm
30
31
32
2am
26
26
26
5am
27
27
25
8am
25
24
24
11am
24
24
24
2pm
24
25
Air Quality Index Trend
48h · 1 stnCastro Valley's air quality is primarily affected by vehicle emissions and industrial activity. Seasonal wildfire smoke and weather patterns can cause periodic air quality deterioration.
86.6%
Humidity
29.8 km/h
Wind SSW
1017.1 hPa
Pressure
0.7
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5▲
4.79 µg/m³
PM10
20.55 µg/m³
050100150200300500
What is the weather forecast for Castro Valley?
Temperature & Precipitation
PM2.5 Trend
48h · 1 stationPM2.54.79 µg/m³
✓ WHO
Good
PM1020.55 µg/m³
Good
UV INDEX0.7
Low
Station readings (65 stations within 25 km)
4.79
Median
4.83
Average
3.26
Low
7.56
High
PM2.5 µg/m³ · Model: 7.0 · Bias: +2.2
What is the 7-day forecast for Castro Valley?
06-09
19.5° 8.9°
06-10
29.5° 11.8°
06-11
30.7° 15.8°
06-12
28.9° 11.9°
06-13
23.2° 9.2°
06-14
27.3° 12.0°
06-15
24.5° 10.5°
Both models agree
Avg diff: 5.0°C
Where are air quality stations near Castro Valley?
20
Grass Valley ES
18
Madison Park Academy HS
20
Esperanza ES
20
Elmhurst United MS
46
Oakland - East, Alameda, California
18
Oakland - East, Alameda, California
20
Lifers 105th
20
Oakland Academy of Knowledge (OAK) ES
20
Lifers 98th
21
Rudsdale Continuation HS
What cities are near Castro Valley?
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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 2026-06-09T03:51 UTC.