What is the air quality in Williamsport today?

The current Air Quality Index (AQI) in Williamsport is 15 (Good). PM2.5 concentration is 3.6 µg/m³.

What is the temperature in Williamsport right now?

The current temperature in Williamsport is 6.5°C (feels like 3.7°C). Humidity is 85.3% and wind speed is 14.1 km/h.

Is it safe to go outside in Williamsport?

Air quality is satisfactory. Enjoy outdoor activities. The UV Index is 0.0 (Low).

Air Quality in Williamsport, United States

Cloudy

6.5°C · 85.3% humidity

6.5°

Feels 3.7°

Good

Air quality is satisfactory. Enjoy outdoor activities.

1 station

Nearby Monitoring Stations

AQI Forecast

— 6pm

—

— 9pm

—

— 12am

—

— 3am

—

— 6am

—

— 9am

—

— 12pm

—

— 3pm

—

Air Quality Index Trend

39h · 2 stn

View full history →

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

85.3%

Humidity

14.1 km/h

Wind ESE

1028.4 hPa

Pressure

0.0

UV Low

GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5

3.6 µg/m³

PM10▲

27.4 µg/m³

050100150200300500

What is the weather forecast for Williamsport?

Temperature & Precipitation

PM2.5 Trend

39h · 2 stations

PM2.53.6 µg/m³ ✓ WHO

Good

PM1027.4 µg/m³

Good

UV INDEX0.0

Low

Station readings (1 station within 25 km)

3.6

Median

3.6

Average

3.6

Low

3.6

High

PM2.5 µg/m³ · Model: 13.5 · Bias: +9.9

What is the 7-day forecast for Williamsport?

10-21

21.1° 3.4°

10-22

17.8° 6.7°

1.06 mm

10-23

10.1° 5.8°

13.0 mm

10-24

13.2° 4.7°

10-25

12.1° 3.1°

15.31 mm

10-26

10.7° 5.4°

6.88 mm

10-27

9.0° 3.9°

0.13 mm

Both models agree Avg diff: 4.3°C

Where are air quality stations near Williamsport?

Montoursville, Pennsylvania, USA

6.5 km PM2.5: 3.6 µg/m³

What cities are near Williamsport?

35 Back Mountain 71 State College 51 Hazleton 35 Wilkes-Barre 17 Elmira 25 Harrisburg 21 Scranton 34 Carlisle 28 Vestal 28 Binghamton

Get AQI alerts for Williamsport

Notify me when air quality reaches:

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

Free · No account · Unsubscribe any time

Data sources: AQI from ground-level monitoring stations via AQICN. Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-10-21T01:07 UTC.