What is the air quality in Hermiston today?

The current Air Quality Index (AQI) in Hermiston is 71 (Moderate). PM2.5 concentration is 21.6 µg/m³.

What is the temperature in Hermiston right now?

The current temperature in Hermiston is 28.9°C (feels like 28.9°C). Humidity is 19.2% and wind speed is 64.8 km/h.

Air Quality in Hermiston, United States

Windy

28.9°C · 19.2% humidity

28.9°

Feels 28.9°

Moderate

Unusually sensitive people should consider reducing prolonged outdoor exertion.

1 station

Nearby Monitoring Stations

AQI Forecast

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Air Quality Index Trend

49h · 5 stn

View full history →

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.

19.2%

Humidity

64.8 km/h

Wind WSW

1009.9 hPa

Pressure

24.9

UV Extreme

GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲

21.6 µg/m³

PM10

20.55 µg/m³

050100150200300500

What is the weather forecast for Hermiston?

Temperature & Precipitation

PM2.5 Trend

49h · 5 stations

PM2.521.6 µg/m³ ×1.4 WHO

Moderate

PM1020.55 µg/m³

Good

UV INDEX24.9

Extreme

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?

Hermiston Municipal Airport, Oregon, USA

2.4 km PM2.5: 7.7 µg/m³

What cities are near Hermiston?

94 Kennewick 98 Pendleton 87 Tri-Cities 112 Pasco 90 Richland 78 Sunnyside 108 Walla Walla 65 Yakima 159 Moses Lake 60 The Dalles

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ModerateAQI > 50 Unhealthy for Sensitive GroupsAQI > 100 UnhealthyAQI > 150 Very UnhealthyAQI > 200

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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 2026-07-21T20:44 UTC.