National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Allentown, Lehigh Valley International Airport (KABE)

Lat: 40.65°NLon: 75.45°WElev: 384ft.

Fair

38°F

3°C

Humidity 93%
Wind Speed Calm
Barometer 30.00 in (1016.1 mb)
Dewpoint 36°F (2°C)
Visibility 10.00 mi
Last update 10 Mar 4:51 am EDT
Extended Forecast for

Mertztown PA

  • Today

    Today: Sunny, with a high near 76. Light west wind becoming southwest 5 to 10 mph in the afternoon.

    High: 76 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 52. South wind around 5 mph becoming calm in the evening.

    Low: 52 °F

    Mostly Clear

  • Wednesday

    Wednesday: A chance of showers. Partly sunny, with a high near 74. Light and variable wind becoming south 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.

    High: 74 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: Showers likely, then showers and possibly a thunderstorm after 11pm. Low around 51. South wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 51 °F

    Showers

  • Thursday

    Thursday: Rain showers before 5pm, then a slight chance of rain and snow showers. Some thunder is also possible. High near 52. Breezy, with a northwest wind around 20 mph, with gusts as high as 35 mph. Chance of precipitation is 80%. Little or no snow accumulation expected.

    High: 52 °F

    Breezy.
    Showers then
    Chance
    Rain/Snow

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 29.

    Low: 29 °F

    Mostly Clear

  • Friday

    Friday: Partly sunny, with a high near 47. Breezy.

    High: 47 °F

    Mostly Sunny
    then Mostly
    Cloudy and
    Breezy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 35.

    Low: 35 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 49.

    High: 49 °F

    Mostly Sunny

Detailed Forecast

Today
Sunny, with a high near 76. Light west wind becoming southwest 5 to 10 mph in the afternoon.
Tonight
Mostly clear, with a low around 52. South wind around 5 mph becoming calm in the evening.
Wednesday
A chance of showers. Partly sunny, with a high near 74. Light and variable wind becoming south 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday Night
Showers likely, then showers and possibly a thunderstorm after 11pm. Low around 51. South wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday
Rain showers before 5pm, then a slight chance of rain and snow showers. Some thunder is also possible. High near 52. Breezy, with a northwest wind around 20 mph, with gusts as high as 35 mph. Chance of precipitation is 80%. Little or no snow accumulation expected.
Thursday Night
Mostly clear, with a low around 29.
Friday
Partly sunny, with a high near 47. Breezy.
Friday Night
Mostly cloudy, with a low around 35.
Saturday
Mostly sunny, with a high near 49.
Saturday Night
Mostly cloudy, with a low around 36.
Sunday
Cloudy, with a high near 57.
Sunday Night
Rain. Low around 44. Chance of precipitation is 90%.
Monday
Rain. High near 54. Breezy. Chance of precipitation is 80%.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mertztown PA
 40.51°N 75.69°W (Elev. 499 ft)
Last Update:
4:08 am EDT Mar 10, 2026
Forecast Valid:
5am EDT Mar 10, 2026-6pm EDT Mar 16, 2026
 
Forecast Discussion
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation