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

Briefing for Flash Flood, Severe Thunderstorm, and Heat Risks through Thursday

Scattered showers and thunderstorms with locally heavy rainfall may lead to areas of flash flooding through tonight. There is potential for isolated severe thunderstorms with damaging wind gusts tonight and Thursday. Hot and very humid conditions are expected Thursday. See this briefing for details on these threats. Read More >

Hazardous Weather Conditions

Current conditions at

Allentown, Lehigh Valley International Airport (KABE)

Lat: 40.65°NLon: 75.45°WElev: 384ft.

A Few Clouds

78°F

26°C

Humidity 90%
Wind Speed SW 7 mph
Barometer 29.92 in (1012.9 mb)
Dewpoint 75°F (24°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 17 Jul 12:51 am EDT
Extended Forecast for

Bethlehem PA

Heat Advisory July 17, 10:00am until July 17, 08:00pm
Click here for hazard details and duration
Heat Advisory

  • Overnight

    Overnight: Showers likely and possibly a thunderstorm before 3am, then a chance of showers and thunderstorms after 3am. Mostly cloudy, with a low around 73. Calm wind. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 73 °F

    Showers
    Likely

  • Thursday

    Thursday: A chance of showers and thunderstorms, mainly after 5pm. Mostly cloudy, then gradually becoming sunny, with a high near 91. West wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 91 °F

    Chance
    T-storms

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 71. Southwest wind around 5 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 71 °F

    Chance
    T-storms then
    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 84. Northwest wind around 5 mph.

    High: 84 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 63. North wind around 5 mph becoming calm.

    Low: 63 °F

    Mostly Clear

  • Saturday

    Saturday: A chance of showers after 2pm. Mostly sunny, with a high near 86. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    High: 86 °F

    Mostly Sunny
    then Chance
    Showers

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 8pm. Mostly cloudy, with a low around 70. Chance of precipitation is 60%.

    Low: 70 °F

    Showers
    Likely

  • Sunday

    Sunday: A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 86. Chance of precipitation is 60%.

    High: 86 °F

    Showers
    Likely

  • Sunday Night

    Sunday Night: Showers likely and possibly a thunderstorm before 8pm. Partly cloudy, with a low around 65. Chance of precipitation is 60%.

    Low: 65 °F

    Showers
    Likely then
    Partly Cloudy

Detailed Forecast

Overnight
Showers likely and possibly a thunderstorm before 3am, then a chance of showers and thunderstorms after 3am. Mostly cloudy, with a low around 73. Calm wind. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday
A chance of showers and thunderstorms, mainly after 5pm. Mostly cloudy, then gradually becoming sunny, with a high near 91. West wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday Night
A chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 71. Southwest wind around 5 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday
Mostly sunny, with a high near 84. Northwest wind around 5 mph.
Friday Night
Mostly clear, with a low around 63. North wind around 5 mph becoming calm.
Saturday
A chance of showers after 2pm. Mostly sunny, with a high near 86. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Saturday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 8pm. Mostly cloudy, with a low around 70. Chance of precipitation is 60%.
Sunday
A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 86. Chance of precipitation is 60%.
Sunday Night
Showers likely and possibly a thunderstorm before 8pm. Partly cloudy, with a low around 65. Chance of precipitation is 60%.
Monday
Mostly sunny, with a high near 85.
Monday Night
Partly cloudy, with a low around 64.
Tuesday
Mostly sunny, with a high near 85.
Tuesday Night
Partly cloudy, with a low around 66.
Wednesday
A chance of showers. Mostly sunny, with a high near 87. Chance of precipitation is 30%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Bethlehem PA
 40.63°N 75.41°W (Elev. 299 ft)
Last Update:
4:12 pm EDT Jul 16, 2025
Forecast Valid:
1am EDT Jul 17, 2025-6pm EDT Jul 23, 2025
 
Forecast Discussion
 
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Additional Resources

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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