What is the air quality in Williamstown today?

The current Air Quality Index (AQI) in Williamstown is 17 (Good). PM2.5 concentration is 3.99 µg/m³.

What is the temperature in Williamstown right now?

The current temperature in Williamstown is 23.5°C (feels like 23.5°C). Humidity is 53.5% and wind speed is 43.6 km/h.

Is it safe to go outside in Williamstown?

Air quality is satisfactory. Enjoy outdoor activities. The UV Index is 0.7 (Low).

Air Quality in Williamstown, United States

Windy

23.5°C · 53.5% humidity

23.5°

Feels 23.5°

Good

Air quality is satisfactory. Enjoy outdoor activities.

Calibrated model

Nearby Monitoring Stations

AQI Forecast

25 4pm

17 7pm

22 10pm

24 1am

25 4am

25 7am

25 10am

25 1pm

Air Quality Index Trend

48h · 2 stn

View full history →

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

53.5%

Humidity

43.6 km/h

Wind ENE

1014.3 hPa

Pressure

0.7

UV Low

GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲

3.99 µg/m³

PM10

13.7 µg/m³

050100150200300500

What is the weather forecast for Williamstown?

Temperature & Precipitation

PM2.5 Trend

48h · 2 stations

PM2.53.99 µg/m³ ✓ WHO

Good

PM1013.7 µg/m³

Good

UV INDEX0.7

Low

What is the 7-day forecast for Williamstown?

07-21

27.3° 20.5°

0.75 mm

07-22

25.5° 18.4°

2.38 mm

07-23

31.5° 21.2°

8.0 mm

07-24

29.1° 19.0°

1.19 mm

07-25

33.2° 22.2°

2.56 mm

07-26

24.7° 21.2°

4.87 mm

07-27

26.0° 21.8°

2.0 mm

Both models agree Avg diff: 2.7°C

Where are air quality stations near Williamstown?

3184 League Island Blvd

27.5 km PM2.5: 9.9 µg/m³

Pattison & Galloway

27.8 km PM2.5: 10.3 µg/m³

AMS SWA Site

29.2 km PM2.5: 9.6 µg/m³

2600 Penrose Ave

29.7 km PM2.5: 10.3 µg/m³

3001 S 84th St

31.6 km PM2.5: 10.0 µg/m³

7331 Lindbergh Blvd

32.0 km PM2.5: 9.8 µg/m³

What cities are near Williamstown?

28 Sicklerville 45 Glassboro 27 Jackson 44 Lindenwold 43 Sewell 13 Vineland 13 South Vineland 45 Cherry Hill 58 Camden 46 Mount Laurel

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

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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 2026-07-21T23:26 UTC.