Air Quality in Hermiston, United States

Windy
35.1°C · 10.5% humidity
35.1°
Feels 35.1°
71
Moderate
Unusually sensitive people should consider reducing prolonged outdoor exertion.
1 station

Nearby Monitoring Stations

AQI Forecast
27 11am
27
27
71 2pm
59
50
43 5pm
66
62
60 8pm
58
57
56 11pm
56
55
55 2am
35
34
34 5am
54
34
34 8am
54
54
AD 728×90

Air Quality Index Trend

48h · 5 stn

Hermiston'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 1.4× the WHO 24-hour guideline of 15 µg/m³.

10.5%
Humidity
111.4 km/h
Wind WSW
1005.0 hPa
Pressure
24.9
UV Extreme
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
71
21.6 µg/m³
PM10
19
20.55 µg/m³
050100150200300500

What is the weather forecast for Hermiston?

Temperature & Precipitation

PM2.5 Trend

48h · 5 stations
PM2.521.6 µg/m³ ×1.4 WHO
Moderate
PM1020.55 µg/m³
Good
UV INDEX24.9
Extreme
AD 300×250
Station readings (1 station within 25 km)
21.6
Median
21.6
Average
21.6
Low
21.6
High
PM2.5 µg/m³ · Model: 6.5 · Bias: -15.1

What is the 7-day forecast for Hermiston?

07-21
38.9° 17.0°
07-22
35.1° 20.0°
07-23
43.4° 19.4°
07-24
43.6° 17.4°
07-25
34.3° 21.5°
07-26
43.2° 14.5°
07-27
37.1° 22.5°
Both models agree Avg diff: 3.4°C

Where are air quality stations near Hermiston?

32
Hermiston Municipal Airport, Oregon, USA
2.4 km PM2.5: 7.7 µg/m³

What cities are near Hermiston?

85 Kennewick 90 Pendleton 83 Tri-Cities 100 Pasco 82 Richland 78 Sunnyside 108 Walla Walla 60 Yakima 159 Moses Lake 31 The Dalles
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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 2026-07-21T21:28 UTC.