Briefing for Late June Heat Wave
An early season heat wave will bring dangerously hot and humid conditions across most of the region beginning Sunday through Wednesday. Read More >
Hazardous Weather Conditions
Current conditions at
Pottstown, Pottstown Limerick Airport (KPTW)
Lat: 40.24°NLon: 75.55°WElev: 288ft.
A Few Clouds
88°F
31°C
| Humidity | 48% |
| Wind Speed | S 9 mph |
| Barometer | 30.11 in (1019.2 mb) |
| Dewpoint | 66°F (19°C) |
| Visibility | 10.00 mi |
| Heat Index | 90°F (32°C) |
| Last update | 21 Jun 4:54 pm EDT |
Extended Forecast for
Harleysville PA
Extreme Heat Warning June 22, 08:00am until June 25, 08:00pm
Tonight
Low: 69 °F
Partly Cloudy
Sunday
High: 94 °F
Sunny
Sunday Night
Low: 75 °F
Mostly Clear
Monday
High: 99 °F
Hot
Monday Night
Low: 77 °F
Mostly Clear
Tuesday
High: 99 °F
Hot
Tuesday Night
Low: 76 °F
Mostly Clear
Wednesday
High: 96 °F
Mostly Sunny
Wednesday Night
Low: 72 °F
Mostly Cloudy
Detailed Forecast
Tonight
Partly cloudy, with a low around 69. Southwest wind around 5 mph becoming calm in the evening.
Sunday
Sunny, with a high near 94. Heat index values as high as 102. West wind 10 to 15 mph.
Sunday Night
Mostly clear, with a low around 75. West wind around 5 mph becoming calm in the evening.
Monday
Sunny and hot, with a high near 99. Heat index values as high as 109. Calm wind becoming northwest around 5 mph in the afternoon.
Monday Night
Mostly clear, with a low around 77. Calm wind.
Tuesday
Sunny and hot, with a high near 99.
Tuesday Night
Mostly clear, with a low around 76.
Wednesday
Mostly sunny, with a high near 96.
Wednesday Night
Mostly cloudy, with a low around 72.
Thursday
A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 91. Chance of precipitation is 50%.
Thursday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 69. Chance of precipitation is 40%.
Friday
A chance of showers. Partly sunny, with a high near 85. Chance of precipitation is 50%.
Friday Night
A chance of showers. Mostly cloudy, with a low around 68. Chance of precipitation is 50%.
Saturday
A chance of showers and thunderstorms. Mostly sunny, with a high near 86. Chance of precipitation is 40%.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
Harleysville PA
40.3°N 75.41°W (Elev. 207 ft)
40.3°N 75.41°W (Elev. 207 ft)
4:12 pm EDT Jun 21, 2025
5pm EDT Jun 21, 2025-6pm EDT Jun 28, 2025
Additional Resources
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Hourly Weather Forecast
