PITTSBURGH, Pa. – The first real chill of fall has gripped western Pennsylvania, but the frost threat is fading fast as warmer air pushes in this weekend. After a frosty Friday morning across parts of Allegheny, Beaver, and Washington counties, temperatures are set to rebound into the upper 60s and low 70s by Sunday, signaling a welcome break for outdoor plans and local harvest events.
According to the National Weather Service in Pittsburgh, the Frost Advisory expired at 9 a.m. Friday, marking the end of the region’s first widespread cold snap of the season. Early morning lows near 33°F coated lawns and pumpkin patches with a thin layer of frost from the Ohio border eastward. The NWS said no additional frost concerns are expected through next week as a steady warming trend builds across southwestern Pennsylvania and northern West Virginia.
Drivers along I-79, I-70, and the Pennsylvania Turnpike should see clear, dry travel through the Columbus Day weekend, though patchy fog could form in valleys during early morning hours. Farmers and gardeners who covered sensitive plants Friday morning can uncover safely, as nighttime lows rise into the upper 40s to near 50°F by Sunday night.
Residents planning leaf-peeping, hayrides, or football tailgates can expect mild, sunny afternoons through midweek. Experts suggest taking advantage of the stable weather to prep for colder late-October snaps expected closer to Halloween.
Five-Day Forecast for Pittsburgh, PA:
Fri: 68/39 – Sunny and crisp; frost risk ends early.
Sat: 70/45 – Mostly sunny; light south breeze.
Sun: 66/50 – Partly sunny; chance of late showers.
Mon: 67/50 – Mild with clouds; great for outdoor events.
Tue: 71/48 – Mostly sunny; ideal for leaf viewing.
