Air Quality in Hermiston, United States
Windy
32.2°C · 22.7% humidity
32.2°
Feels 32.2°
42
Good
Air quality is satisfactory. Enjoy outdoor activities.
2 stations
Nearby Monitoring Stations
Hermiston's air quality — share it
AQI Forecast
24
2pm
24
24
42
5pm
37
33
31
8pm
29
28
27
11pm
27
26
26
2am
26
25
25
5am
25
25
25
8am
25
25
25
11am
25
25
Air Quality Index Trend
48h · 5 stnHermiston'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 Hermiston is 2.0× the WHO annual guideline of 5 µg/m³.
22.7%
Humidity
42.4 km/h
Wind WSW
1018.3 hPa
Pressure
5.9
UV High
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5▲
10.05 µg/m³
PM10
20.55 µg/m³
050100150200300500
What is the weather forecast for Hermiston?
Temperature & Precipitation
PM2.5 Trend
48h · 5 stationsPM2.510.05 µg/m³
✓ WHO
Good
PM1020.55 µg/m³
Good
UV INDEX5.9
High
Station readings (2 stations within 25 km)
10.05
Median
10.05
Average
8.6
Low
11.5
High
PM2.5 µg/m³ · Model: 6.15 · Bias: -3.9
What is the 7-day forecast for Hermiston?
05-29
32.2° 10.7°
0.38 mm
05-30
24.2° 13.7°
05-31
35.9° 17.0°
06-01
27.5° 8.2°
06-02
33.1° 11.9°
06-03
27.1° 6.2°
06-04
26.4° 9.6°
4.5 mm
Both models agree
Avg diff: 4.9°C
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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 2026-05-29T00:11 UTC.