Air Quality in Walla Walla, United States
Windy
29.7°C · 19.0% humidity
29.7°
Feels 29.7°
125
Unhealthy for sensitive groups
Sensitive groups should reduce prolonged outdoor exertion.
1 station
Nearby Monitoring Stations
Walla Walla's air quality — share it
AQI Forecast
Calibrated
185
10am
178
178
125
1pm
140
151
159
4pm
162
195
198
7pm
200
201
214
10pm
215
216
216
1am
216
205
205
4am
205
234
234
7am
234
234
Station readings
192
125
CAMS model
adj +151
34
27
27
27
27
27
27
25
54
54
54
54
66
66
66
66
66
54
54
54
83
83
83
83
Air Quality Index Trend
22h · 1 stnWalla Walla'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 Walla Walla is 3.0× the WHO 24-hour guideline of 15 µg/m³.
19.0%
Humidity
53.2 km/h
Wind W
1009.9 hPa
Pressure
24.9
UV Extreme
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5▲
45.2 µg/m³
PM10
27.45 µg/m³
050100150200300500
What is the weather forecast for Walla Walla?
Temperature & Precipitation
PM2.5 Trend
22h · 1 stationPM2.545.2 µg/m³
×3.0 WHO
Unhealthy for sensitive groups
PM1027.45 µg/m³
Good
UV INDEX24.9
Extreme
Station readings (1 station within 25 km)
45.2
Median
45.2
Average
45.2
Low
45.2
High
PM2.5 µg/m³ · Model: 7.35 · Bias: -37.8
What is the 7-day forecast for Walla Walla?
07-21
39.2° 21.0°
07-22
35.8° 23.7°
07-23
43.5° 23.7°
07-24
44.0° 21.4°
07-25
34.4° 23.1°
07-26
43.6° 18.7°
07-27
36.9° 24.5°
Both models agree
Avg diff: 3.8°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 2026-07-21T20:02 UTC.