Dangerous Heat Builds and Expands; Critical Fire Weather for the Southwest; Severe Thunderstorms for Plains and Midwest

Dangerous to record breaking heat will build across the center of the nation and slowly build eastward this week. Wildfire conditions remain critical for the Southwest and portions of the Great Basin through Monday. For the northern Plains and upper Midwest, severe thunderstorms with the potential for large to very large hail and severe winds are the primary hazards. Read More >

Current conditions at

Schuylkill County/Joe Zerbey Airport (KZER)

Lat: 40.71°NLon: 76.37°WElev: 1730ft.

Fair

63°F

17°C

Humidity 100%
Wind Speed Calm
Barometer 30.10 in
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Last update 29 Jun 3:15 am EDT
Extended Forecast for

Saint Clair PA

Extreme Heat Watch July 1, 12:00pm until July 3, 08:00pm
Click here for hazard details and duration
Extreme Heat Watch
  • Overnight

    Overnight: Patchy fog.  Otherwise, partly cloudy, with a low around 62. Calm wind.

    Low: 62 °F

    Patchy Fog

  • Monday

    Monday: Patchy fog between 8am and 9am.  Otherwise, mostly sunny, with a high near 88. Calm wind.

    High: 88 °F

    Patchy Fog
    then Mostly
    Sunny

  • Monday Night

    Monday Night: Mostly cloudy, then gradually becoming clear, with a low around 64. Calm wind.

    Low: 64 °F

    Decreasing
    Clouds

  • Tuesday

    Tuesday: Sunny, with a high near 89. Calm wind becoming south around 6 mph in the afternoon.

    High: 89 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 67. Light south wind.

    Low: 67 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 96.

    High: 96 °F

    Hot

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 73.

    Low: 73 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny and hot, with a high near 99.

    High: 99 °F

    Hot

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 73.

    Low: 73 °F

    Mostly Clear

Detailed Forecast

Overnight
Patchy fog. Otherwise, partly cloudy, with a low around 62. Calm wind.
Monday
Patchy fog between 8am and 9am. Otherwise, mostly sunny, with a high near 88. Calm wind.
Monday Night
Mostly cloudy, then gradually becoming clear, with a low around 64. Calm wind.
Tuesday
Sunny, with a high near 89. Calm wind becoming south around 6 mph in the afternoon.
Tuesday Night
Mostly clear, with a low around 67. Light south wind.
Wednesday
Sunny and hot, with a high near 96.
Wednesday Night
Mostly clear, with a low around 73.
Thursday
Sunny and hot, with a high near 99.
Thursday Night
Mostly clear, with a low around 73.
Friday
Sunny and hot, with a high near 99.
Friday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 72. Chance of precipitation is 30%.
Independence Day
A chance of showers and thunderstorms. Mostly sunny and hot, with a high near 95. Chance of precipitation is 40%.
Saturday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 69. Chance of precipitation is 40%.
Sunday
A chance of showers and thunderstorms. Mostly sunny, with a high near 91. Chance of precipitation is 30%.
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ABOUT THIS FORECAST

 
Point Forecast:
Saint Clair PA
 40.72°N 76.21°W (Elev. 817 ft)
3:21 am EDT Jun 29, 2026
3am EDT Jun 29, 2026-6pm EDT Jul 5, 2026
 
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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