Air Quality in Lewiston, United States

Windy
29.6°C · 16.8% humidity
29.6°
Feels 29.6°
52
Moderate
Unusually sensitive people should consider reducing prolonged outdoor exertion.
1 station

Nearby Monitoring Stations

AQI Forecast Calibrated
85 11am
85
85
52 2pm
61
68
73 5pm
78
81
83 8pm
84
85
85 11pm
86
86
86 2am
87
87
87 5am
206
206
206 8am
206
206
Station readings
115
79
87
CAMS model adj +60
25
25
25
25
25
25
25
27
27
27
27
27
27
27
27
27
27
27
27
146
146
146
146
146
AD 728×90

Air Quality Index Trend

21h · 1 stn

Lewiston's air quality is primarily affected by vehicle emissions and industrial activity. Seasonal wildfire smoke and weather patterns can cause periodic air quality deterioration.

16.8%
Humidity
80.9 km/h
Wind WNW
1005.1 hPa
Pressure
24.9
UV Extreme
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
52
12.6 µg/m³
PM10
13
13.7 µg/m³
050100150200300500

What is the weather forecast for Lewiston?

Temperature & Precipitation

PM2.5 Trend

21h · 1 station
PM2.512.6 µg/m³ ✓ WHO
Moderate
PM1013.7 µg/m³
Good
UV INDEX24.9
Extreme
AD 300×250
Station readings (1 station within 25 km)
12.6
Median
12.6
Average
12.6
Low
12.6
High
PM2.5 µg/m³ · Model: 6.0 · Bias: -6.6

What is the 7-day forecast for Lewiston?

07-21
37.1° 17.6°
07-22
33.8° 19.2°
0.06 mm
07-23
40.2° 20.1°
07-24
42.2° 18.4°
07-25
33.6° 19.9°
07-26
41.3° 13.3°
07-27
34.1° 21.3°
Both models agree Avg diff: 3.4°C

Where are air quality stations near Lewiston?

13
Lewiston, Idaho, USA
2.1 km PM2.5: 3.1 µg/m³
30
Lewiston, Idaho, USA
2.1 km PM2.5: 7.2 µg/m³
27
Lewiston, Idaho, USA
2.1 km PM2.5: 6.5 µg/m³
40
13th St, Clarkston, Washington, USA
3.4 km PM2.5: 9.6 µg/m³
59
13th St, Clarkston, Washington, USA
3.4 km PM2.5: 15.9 µg/m³
59
13th St, Clarkston, Washington, USA
3.4 km PM2.5: 15.9 µg/m³
45
Lapwai_trex, Idaho, USA
16.4 km PM2.5: 10.8 µg/m³
63
Lapwai_trex, Idaho, USA
16.4 km PM2.5: 17.8 µg/m³
70
Lapwai_trex, Idaho, USA
16.4 km PM2.5: 21.1 µg/m³
30
Lapwai_trex, Idaho, USA
16.4 km PM2.5: 7.2 µg/m³

What cities are near Lewiston?

52 Lewiston Orchards 102 Moscow 102 Pullman 108 Walla Walla 76 Opportunity 76 Spokane Valley 25 Coeur d'Alene 73 Spokane 70 Post Falls 90 Pendleton
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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 2026-07-21T21:07 UTC.