Air Quality in Williamsport, United States
Partly Cloudy
22.6°C · 69.2% humidity
22.6°
Feels 22.6°
13
Good
Air quality is satisfactory. Enjoy outdoor activities.
1 station
Nearby Monitoring Stations
Williamsport's air quality — share it
AQI Forecast
25
10am
25
25
13
1pm
15
18
20
4pm
21
22
22
7pm
23
23
23
10pm
24
24
24
1am
24
24
24
4am
24
24
25
7am
24
24
Air Quality Index Trend
36h · 2 stnWilliamsport's air quality is primarily affected by vehicle emissions and industrial activity. Seasonal wildfire smoke and weather patterns can cause periodic air quality deterioration.
69.2%
Humidity
28.0 km/h
Wind SSW
1018.1 hPa
Pressure
17.4
UV Extreme
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5▲
3.1 µg/m³
PM10
13.7 µg/m³
050100150200300500
What is the weather forecast for Williamsport?
Temperature & Precipitation
PM2.5 Trend
36h · 2 stationsPM2.53.1 µg/m³
✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX17.4
Extreme
Station readings (1 station within 25 km)
3.1
Median
3.1
Average
3.1
Low
3.1
High
PM2.5 µg/m³ · Model: 6.0 · Bias: +2.9
What is the 7-day forecast for Williamsport?
09-05
22.6° 13.1°
0.38 mm
09-06
22.1° 16.4°
3.63 mm
09-07
20.8° 14.4°
0.5 mm
09-08
21.0° 14.2°
2.19 mm
09-09
22.0° 11.6°
0.31 mm
09-10
24.6° 12.9°
1.06 mm
09-11
31.4° 7.4°
0.13 mm
Both models agree
Avg diff: 5.1°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 2026-09-05T17:29 UTC.