How is the weather in Allentown, PA?

At 1:50 PM on Thu, Sep 18, 2025 it is sunny and 83 degrees Fahrenheit, feeling like 83 degrees.

Allentown, PA Weather Forecast and Current Conditions (18101)

83°F
Feels Like 83°F

Humidity 44% Dew Point 59°F Wind S 3 MPH Gusts 9 Barometer 29.53 in.750.1 mm

Solar Rad 565 w/m2 UV Index 5

Report from 2 miles NNW of central Allentown at 1:50 PM Thu, Sep 18, 2025

Current Weather

83°F
Feels Like 83°F

Humidity 44% Dew Point 59°F Wind S 3 MPH Gusts 9 Barometer 29.53 in.750.1 mm

Solar Rad 565 w/m2 UV Index 5

Report from 2 miles NNW of central Allentown at 1:50 PM Thu, Sep 18, 2025

Forecast at a Glance

ThuSep 18

10%

84°

58°

FriSep 19

85°

54°

SatSep 20

76°

54°

SunSep 21

75°

56°

MonSep 22

80°

60°

TueSep 23

20%

85°

62°

WedSep 24

20%

82°

59°

This Date in Weather History

1941 - One of the greatest aurora borealis or northern lights ever observed in the central Atlantic and mid-central portions of the U.S. occurred on the night of September 18-19th. The displays continued from twilight until just before dawn and were observed as far south as Florida and southern California.

Allentown 7 Day Weather Forecast Details

Thursday Sep 18

Day: Areas of fog before 9am. Mostly sunny, with a high near 84. West wind 0 to 5 mph.

Night: Clear, with a low around 58. West wind around 5 mph.

Friday Sep 19

Day: Sunny, with a high near 85. Northwest wind 0 to 10 mph.

Night: Mostly clear, with a low around 54. North wind around 5 mph.

Saturday Sep 20

Day: Sunny, with a high near 76.

Night: Partly cloudy, with a low around 54.

Sunday Sep 21

Day: Partly sunny, with a high near 75.

Night: Mostly cloudy, with a low around 56.

Monday Sep 22

Day: Partly sunny, with a high near 80.

Night: Partly cloudy, with a low around 60.

Tuesday Sep 23

Day: A slight chance of rain showers after 2pm. Partly sunny, with a high near 85.

Night: A slight chance of rain showers. Mostly cloudy, with a low around 62.

Wednesday Sep 24

Day: A slight chance of rain showers. Partly sunny, with a high near 82.

Sun & Moon Monthly

First Light 6:19 AM

Sunrise 6:47 AM

Sunset 7:07 PM

Last Light 7:35 PM

Moonrise 3:16 AM

Moonset 5:53 PM

Moon Phase

Data costs money. Servers cost money. Our website is made possible by displaying online advertisements to our visitors. Please consider supporting us by disabling your ad blocker, contribute to WeatherForYou.com by buying me a coffee or subscribe to our ClearSky ad-free service.

Weather Near Allentown

Belfast, PA

Fountain, PA

Contiguous United States Extremes

Wed's High Temperature
114 at Death Valley, CA

Thu's Low Temperature
19 at Peter Sinks, UT

Weather Folklore

If the goose honks high, fair weather; If the goose honks low, foul weather.

Current subscribers - login to your ClearSky account

About Allentown, Pennsylvania

Allentown (Pennsylvania Dutch: Allenschteddel, Allenschtadt, or Ellsdaun) is a city in eastern Pennsylvania, United States. The county seat of Lehigh County, it is the third-most populous city in Pennsylvania, with a population of 125,845 as of the 2020 census. It is also the most populous city in the Lehigh Valley metropolitan area, which had a population of 861,899 and was the 68th-most populous metropolitan area in the nation as of 2020.

Founded in 1762, Allentown is located on the Lehigh River, a 109-mile-long (175 km) tributary of the Delaware River. It is the largest of three adjacent cities, including Bethlehem and Easton in Lehigh and Northampton counties, in the Lehigh Valley region. Allentown is located 48 miles (77 km) north of Philadelphia and 78 miles (126 km) west of New York City.

Content from Wikipedia, licensed under CC BY-SA 3.0.