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Hazardous Weather Conditions

Current conditions at

Schuylkill County/Joe Zerbey Airport (KZER)

Lat: 40.71°NLon: 76.37°WElev: 1730ft.

Rain

68°F

20°C

Humidity 94%
Wind Speed Calm
Barometer 30.02 in
Dewpoint 66°F (19°C)
Visibility 5.00 mi
Last update 20 Aug 2:35 pm EDT
Extended Forecast for

Saint Clair PA

Flood Watch August 20, 03:13pm until August 20, 08:00pm
Click here for hazard details and duration
Flood Watch
  •  
    Flood Watch August 20, 03:13pm until August 20, 08:00pm

    NOW until 8:00pm Thu

    Flood Watch

  • This Afternoon

    High: 73 °F

    Rain

  • Tonight

    Tonight: Rain and possibly a thunderstorm before 9pm, then a slight chance of rain between 9pm and 10pm. Patchy fog before 10pm, then patchy fog after 11pm. Low around 58. North wind 3 to 6 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 58 °F

    Rain and
    Patchy Fog
    then Patchy
    Fog

  • Friday

    Friday: Patchy fog before 9am. Otherwise, mostly sunny, with a high near 78. Light and variable wind.

    High: 78 °F

    Patchy Fog
    then Mostly
    Sunny

  • Friday Night

    Friday Night: Increasing clouds, with a low around 61. Calm wind.

    Low: 61 °F

    Increasing
    Clouds

  • Saturday

    Saturday: A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 75. Light southeast wind. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 75 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: Showers and thunderstorms likely before 11pm, then a chance of showers between 11pm and 2am. Mostly cloudy, with a low around 62. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 62 °F

    Showers
    Likely

  • Sunday

    Sunday: A chance of showers between 8am and 2pm, then a chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 77. Chance of precipitation is 50%.

    High: 77 °F

    Chance
    Showers then
    Chance
    T-storms

  • Sunday Night

    Sunday Night: A chance of thunderstorms before 8pm. Mostly clear, with a low around 56. Chance of precipitation is 30%.

    Low: 56 °F

    Chance
    T-storms then
    Mostly Clear

Detailed Forecast

This Afternoon
Rain and possibly a thunderstorm. High near 73. Light east wind. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Tonight
Rain and possibly a thunderstorm before 9pm, then a slight chance of rain between 9pm and 10pm. Patchy fog before 10pm, then patchy fog after 11pm. Low around 58. North wind 3 to 6 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Friday
Patchy fog before 9am. Otherwise, mostly sunny, with a high near 78. Light and variable wind.
Friday Night
Increasing clouds, with a low around 61. Calm wind.
Saturday
A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 75. Light southeast wind. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday Night
Showers and thunderstorms likely before 11pm, then a chance of showers between 11pm and 2am. Mostly cloudy, with a low around 62. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday
A chance of showers between 8am and 2pm, then a chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 77. Chance of precipitation is 50%.
Sunday Night
A chance of thunderstorms before 8pm. Mostly clear, with a low around 56. Chance of precipitation is 30%.
Monday
Sunny, with a high near 74.
Monday Night
Mostly clear, with a low around 55.
Tuesday
Sunny, with a high near 75.
Tuesday Night
Mostly clear, with a low around 57.
Wednesday
Mostly sunny, with a high near 79.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 62. Chance of precipitation is 40%.
Thursday
A chance of showers. Partly sunny, with a high near 80.
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ABOUT THIS FORECAST

 
Point Forecast:
Saint Clair PA
 40.74°N 76.2°W (Elev. 988 ft)
Last Update:
2:41 pm EDT Aug 20, 2026
Forecast Valid:
3pm EDT Aug 20, 2026-6pm EDT Aug 27, 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