Today | Weather | Friday, June 5, 2026

Weather in Allentown, Pennsylvania

07:12 PM
Now
Sunny Weather
88° F
Feels Like 86°
Precipitation 0 %
Wind 8 mph
UV Index (0 - 11+) 1
Humidity 34 %
Today
Sunny Weather
Day 91°
Night 63°
Precipitation 0 %
Wind 6 mph
UV Index (0 - 11+) 11

Warning: Extreme UV Index Today: 11

Overexposure to the sun's harmful UV rays can cause sunburn and increase the risk of developing skin cancer, including melanoma. Protect yourself by wearing clothing that covers your skin, sunglasses, and a hat. Apply a broad-spectrum sunscreen with an SPF of 30 or higher every two hours, even on cloudy days. Minimize direct sun exposure during peak hours (10 AM to 4 PM) to reduce the risk.

Allentown Weather Forecast Updated

31 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (June 5, 2025)
Cloudy Weather

Day

90°

Night

64°

Wind

6 mph

UV Index

11

Precipitation

25 %

Air Quality in Allentown

NOW
126 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 21.09 µg/m³
PM10 22.44 µg/m³
O3 0.078 ppm
NO2 2.6 ppb
SO2 1.2 ppb
CO 0.13 ppm
NH3 0.92 µg/m³
NO 0.25 µg/m³
PM2.5 – Fine particles <2.5μm
PM10 – Inhalable particles <10μm
O3 – Ozone
NO2 – Nitrogen dioxide
SO2 – Sulfur dioxide
CO – Carbon monoxide
NH3 – Ammonia
NO – Nitric oxide

Health Recommendations:

Members of sensitive groups may experience health effects. The general public is not likely to be affected.

Show raw pollutant concentrations (µg/m³)
PM2.521.09 µg/m³
PM1022.44 µg/m³
O3152.57 µg/m³
NO24.82 µg/m³
SO23.2 µg/m³
CO147.29 µg/m³
NH30.92 µg/m³
NO0.25 µg/m³