Air Quality in Lewiston, United States

Clear
29.0°C · 13.8% humidity
29.0°
Feels 29.0°
154
Unhealthy
Everyone should reduce prolonged outdoor exertion.
1 station

Nearby Monitoring Stations

AQI Forecast Calibrated
157 1pm
157
137
154 4pm
149
146
143 7pm
141
140
139 10pm
159
158
158 1am
158
157
157 4am
157
137
137 7am
137
137
137 10am
137
130
Station readings
157
154
155
156
CAMS model adj +103
54
54
34
34
34
34
34
34
34
34
54
54
54
54
54
54
54
34
34
34
34
34
34
27
AD 728×90

Air Quality Index Trend

36h · 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. Current PM2.5 concentration in Lewiston is 4.1× the WHO 24-hour guideline of 15 µg/m³.

13.8%
Humidity
23.5 km/h
Wind W
1008.7 hPa
Pressure
12.9
UV Extreme
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
154
61.3 µg/m³
PM10
56
66.15 µg/m³
050100150200300500

What is the weather forecast for Lewiston?

Temperature & Precipitation

PM2.5 Trend

36h · 1 station
PM2.561.3 µg/m³ ×4.1 WHO
Unhealthy
PM1066.15 µg/m³
Moderate
UV INDEX12.9
Extreme
AD 300×250
Station readings (1 station within 25 km)
61.3
Median
61.3
Average
61.3
Low
61.3
High
PM2.5 µg/m³ · Model: 13.7 · Bias: -47.6

What is the 7-day forecast for Lewiston?

08-03
40.4° 17.8°
08-04
31.6° 17.7°
08-05
37.7° 20.5°
08-06
30.9° 17.2°
08-07
37.0° 17.8°
08-08
33.5° 11.6°
08-09
34.8° 16.2°
Both models agree Avg diff: 2.6°C

Where are air quality stations near Lewiston?

156
13th St, Clarkston, Washington, USA
3.4 km PM2.5: 65.2 µg/m³
155
Lapwai_trex, Idaho, USA
16.4 km PM2.5: 63.2 µg/m³
154
Lapwai_trex, Idaho, USA
16.4 km PM2.5: 61.3 µg/m³
154
Juliaetta, Idaho, USA
29.7 km PM2.5: 61.3 µg/m³
154
Juliaetta, Idaho, USA
29.7 km PM2.5: 61.3 µg/m³

What cities are near Lewiston?

154 Lewiston Orchards 68 Moscow 68 Pullman 103 Walla Walla 147 Opportunity 145 Spokane Valley 157 Coeur d'Alene 142 Spokane 145 Post Falls 54 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 2026-08-07T23:59 UTC.