Jefferson, Pennsylvania Weather
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Click for Heat Advisory for Jefferson, Pennsylvania
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Weather Forecast for Jefferson, Pennsylvania : Greene County
Issued: 1:04 pm EDT Jun 21, 2025 Latitude: 39.9300749 Longitude: -80.0589461 View on Google Maps

MouseOver for Detail Forecast
This Afternoon Tonight Sunday Monday Tuesday Wednesday Thursday Friday
Mostly Sunny on This Afternoon Clear on Tonight Sunny on Sunday Sunny on Monday Sunny on Tuesday Sunny on Wednesday 40% chance of thunderstorms on Thursday 50% chance of thunderstorms on Friday
High: 89°F Low: 67°F High: 94°F High: 94°F High: 94°F High: 94°F High: 91°F High: 91°F
Low: 70°F Low: 72°F Low: 71°F Low: 70°F Low: 71°F  
Mostly Sunny Clear Sunny Sunny Sunny Sunny Thunderstorms Thunderstorms
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Mostly Sunny on This Afternoon This Afternoon... Mostly sunny, with a high near 89. South wind around 7 mph.
Clear on Tonight Tonight... Clear, with a low around 67. South wind 3 to 5 mph.
Sunny on Sunday Sunday... Sunny and hot, with a high near 94. Heat index values as high as 101. Southwest wind 5 to 7 mph.
Mostly Clear on Sunday Night Sunday Night... Mostly clear, with a low around 70. Calm wind.
Sunny on Monday Monday... Sunny and hot, with a high near 94. Calm wind becoming west around 5 mph in the afternoon.
Mostly Clear on Monday Night Monday Night... Mostly clear, with a low around 72.
Sunny on Tuesday Tuesday... Sunny and hot, with a high near 94.
Mostly Clear on Tuesday Night Tuesday Night... Mostly clear, with a low around 71.
Sunny on Wednesday Wednesday... Sunny and hot, with a high near 94.
Cloudy on Wednesday Night Wednesday Night... Partly cloudy, with a low around 70.
40% chance of thunderstorms Thursday Thursday... A chance of showers and thunderstorms. Mostly sunny and hot, with a high near 91. Chance of precipitation is 40%.
30% chance of thunderstorms Thursday Night Thursday Night... A chance of showers and thunderstorms. Partly cloudy, with a low around 71. Chance of precipitation is 30%.
50% chance of thunderstorms Friday Friday... A chance of showers and thunderstorms. Mostly sunny and hot, with a high near 91. Chance of precipitation is 50%.
Sun Almanac for Jefferson, Pennsylvania
Sunrise: 05:52 AM
Sunset: 8:52 PM
Civil Sunrise:05:19 AM
Civil Sunset: 9:25 PM
Nautical Sunrise: 04:37 AM
Nautical Sunset: 10:07 PM
Astro Sunrise: 03:49 AM
Astro Sunset: 10:55 PM
Any use of the information on this page is at your own risk. This information should not be relied upon in life-threatening situations, potential financial loss situations or in lieu of any officially disseminated information. Visit the National Weather Service for official information.