Today | Weather | Tuesday, December 30, 2025
Active Weather Warnings

Weather in Allentown, Pennsylvania

12:13 AM
Now
Cloudy Night
23° F
Feels Like
Precipitation 0 %
Wind 17 mph
Humidity 62 %
Today
Windy Weather
Day 30°
Night 21°
Precipitation 3 %
Wind 21 mph
UV Index (0 - 11+) 1

Allentown Weather Forecast Updated

20 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (December 30, 2024)
Cloudy Weather

Day

54°

Night

28°

Wind

12 mph

UV Index

2

Precipitation

0 %

Air Quality in Allentown

NOW
28 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 0.5 µg/m³
PM10 0.51 µg/m³
O3 0.030 ppm
NO2 2.1 ppb
SO2 0.4 ppb
CO 0.13 ppm
NH3 0.31 µg/m³
NO 0 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:

Air quality is considered satisfactory, and air pollution poses little or no risk.

Show raw pollutant concentrations (µg/m³)
PM2.50.5 µg/m³
PM100.51 µg/m³
O359.87 µg/m³
NO23.95 µg/m³
SO20.93 µg/m³
CO151.97 µg/m³
NH30.31 µg/m³
NO0 µg/m³

Weather Alerts and Warnings for Allentown

Moderate Expected Likely

Wind Advisory

Wind Advisory issued December 29 at 1:21PM EST until December 30 at 1:00PM EST by NWS Mount Holly NJ
Dec 29, 1:21 PM Dec 30, 1:00 PM
WHAT: West winds 15 to 25 mph with gusts up to 50 mph.

WHERE: Portions of northern Delaware, central, northern,
northwest, and southern New Jersey, and east central and southeast
Pennsylvania.

WHEN: Until 1 PM EST Tuesday.

IMPACTS: Gusty winds will blow around unsecured objects. Tree
limbs could be blown down and a few power outages may result.
+ Read More
Winds this strong can make driving difficult, especially for high profile vehicles. Use extra caution. Secure outdoor objects.
Updated: Dec 29, 11:52 PM Source: NWS Alert