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

Excessive Rainfall Possible for the Gulf Coast and Florida; October Heat Wave in California

A slow moving front will be the focus area for heavy to excessive rainfall and a threat for flash/urban flooding across parts of the Gulf Coast into central/northern Florida early this week. Abnormally hot, potentially record-breaking, temperatures will continue for southern California and stretch north toward the Bay Area and Central Valley this week. Read More >

Current conditions at

Allentown, Lehigh Valley International Airport (KABE)

Lat: 40.65°NLon: 75.45°WElev: 384ft.

Overcast

58°F

14°C

Humidity 87%
Wind Speed E 8 mph
Barometer 30.12 in (1019.9 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 4 Oct 5:51 pm EDT
Extended Forecast for

Mertztown PA

  • This Afternoon

    This Afternoon: A slight chance of showers. Cloudy, with a high near 59. Northeast wind around 5 mph. Chance of precipitation is 20%.

    High: 59 °F

    Slight Chance
    Showers

  • Tonight

    Tonight: Cloudy, then gradually becoming partly cloudy, with a low around 53. Northeast wind around 5 mph becoming calm.

    Low: 53 °F

    Decreasing
    Clouds

  • Monday

    Monday: Partly sunny, then gradually becoming sunny, with a high near 68. Northwest wind 5 to 15 mph.

    High: 68 °F

    Becoming
    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 42. Northwest wind 5 to 10 mph.

    Low: 42 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 63. Northwest wind around 5 mph.

    High: 63 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 41.

    Low: 41 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 69.

    High: 69 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 50.

    Low: 50 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 74.

    High: 74 °F

    Sunny

Detailed Forecast

This Afternoon
A slight chance of showers. Cloudy, with a high near 59. Northeast wind around 5 mph. Chance of precipitation is 20%.
Tonight
Cloudy, then gradually becoming partly cloudy, with a low around 53. Northeast wind around 5 mph becoming calm.
Monday
Partly sunny, then gradually becoming sunny, with a high near 68. Northwest wind 5 to 15 mph.
Monday Night
Clear, with a low around 42. Northwest wind 5 to 10 mph.
Tuesday
Sunny, with a high near 63. Northwest wind around 5 mph.
Tuesday Night
Clear, with a low around 41.
Wednesday
Sunny, with a high near 69.
Wednesday Night
Mostly clear, with a low around 50.
Thursday
Sunny, with a high near 74.
Thursday Night
Mostly clear, with a low around 49.
Friday
Sunny, with a high near 71.
Friday Night
Mostly clear, with a low around 49.
Saturday
Sunny, with a high near 68.
Saturday Night
Partly cloudy, with a low around 47.
Sunday
Mostly sunny, with a high near 66.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mertztown PA
 40.5°N 75.66°W (Elev. 499 ft)
Last Update:
4:31 pm EDT Oct 4, 2026
Forecast Valid:
5pm EDT Oct 4, 2026-6pm EDT Oct 11, 2026
 
Forecast Discussion
 
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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