Weather
Western Pennsylvania Weather: Frost Alerts End in 9 Counties Oct 25
Pittsburgh, PA – Warm afternoon sunshine is expected to return across the Pittsburgh area during the final week of October, with temperatures climbing into the lower 70s by Wednesday and reaching appr
By Mara Ellison · 2026-10-25T08:32:26.769Z
Pittsburgh, PA – Warm afternoon sunshine is expected to return across the Pittsburgh area during the final week of October, with temperatures climbing into the lower 70s by Wednesday and reaching approximately 73 degrees Thursday, Oct. 29. The mild conditions follow an earlier hard freeze that prompted the National Weather Service to end its 2026 growing season frost and freeze alert program across several northwestern Pennsylvania counties. Despite the seasonal change, the upcoming forecast offers several days of comfortable afternoon weather, limited wind and no significant precipitation indicated through Halloween.
According to the National Weather Service in Pittsburgh, temperatures are expected to reach approximately 70 degrees Wednesday before climbing to 73 degrees Thursday. The warming trend follows a sunny Sunday with a high near 67 degrees and a mild Monday reaching 70 degrees. The forecast suggests a relatively stable late October pattern, with nighttime temperatures generally remaining in the 40s rather than returning to freezing levels across the city.
Wednesday Brings Mild Weather Before Thursday Warmup Wednesday, Oct. 28, is expected to bring mostly cloudy skies and an afternoon high near 70 degrees, continuing a stretch of temperatures considerably warmer than the freezing conditions experienced earlier in portions of western Pennsylvania. Wednesday night becomes partly cloudy, with temperatures dropping to approximately 48 degrees.
Thursday brings a more noticeable improvement in sunshine, with temperatures reaching approximately 73 degrees. Mostly clear skies follow Thursday night, with a low around 48 degrees. The mild afternoon conditions could provide favorable opportunities for outdoor activities, neighborhood events and travel throughout Pittsburgh and surrounding Allegheny County communities.
The National Weather Service forecast does not indicate measurable rainfall, thunderstorms or significant wind hazards during the Wednesday through Thursday period. While weather conditions can change, the available outlook supports generally favorable travel conditions along Interstate 376, Interstate 279 and the Pennsylvania Turnpike. No weather related road closures or disruptions are identified in the supplied information.
Growing Season Ends Across Nine Pennsylvania Counties The warmer forecast arrives after the National Weather Service Pittsburgh office announced an important seasonal change affecting portions of northwestern and western Pennsylvania.
In a public information statement issued Oct. 18, the agency confirmed that a hard freeze had ended the 2026 growing season in Mercer, Lawrence, Butler, Venango, Forest, Clarion, Armstrong, Indiana and Jefferson counties. Higher ridge elevations in Westmoreland and Fayette counties were also included.
The announcement means the weather service will no longer issue routine frost and freeze watches, warnings or advisories for those locations during the remainder of the 2026 growing season. The change reflects the seasonal status of vegetation following the hard freeze, rather than a guarantee that additional cold weather will not occur.
Other locations within the Pittsburgh forecast office's coverage remain in their active growing season until a qualifying hard freeze occurs or Nov. 1 arrives, whichever comes first. The agency defines the qualifying freeze as temperatures below 29 degrees for at least three hours.
Residents should understand that the end of frost and freeze alerts does not eliminate the possibility of future freezing temperatures. Gardeners and property owners may still need to protect vulnerable plants and outdoor equipment when colder weather returns.
Mild Temperatures Continue Into Halloween Weekend Friday, Oct. 30, is expected to remain mostly sunny, with temperatures reaching approximately 73 degrees. Friday night becomes partly cloudy, with a low around 48 degrees.
Saturday, Oct. 31, brings another mild afternoon, with partly sunny skies and temperatures near 73 degrees. The forecast suggests favorable daytime conditions for Halloween activities, although the supplied outlook does not provide a specific Saturday evening temperature.
The extended stretch of mild weather offers a contrast to the earlier hard freeze across portions of the region. For Pittsburgh residents, the main weather development is the persistence of comfortable afternoon temperatures into the final days of October, even as the broader region transitions toward November.
Are you enjoying Pittsburgh's return to the 70s, or are you ready for colder fall temperatures to settle in?
Five Day Weather Outlook Sunday 10/25: Sunny skies are expected across Pittsburgh, with an afternoon high near 67 degrees and calm winds; mostly clear conditions follow Sunday night, with temperatures falling to approximately 40 degrees.
Monday 10/26: Sunshine continues with temperatures climbing to around 70 degrees and calm winds becoming westerly near 5 mph during the afternoon; Monday night turns partly cloudy, with a low around 45 degrees.
Tuesday 10/27: Mostly sunny skies accompany an afternoon high near 68 degrees, maintaining mild conditions across Pittsburgh; Tuesday night becomes mostly cloudy, with temperatures falling to approximately 46 degrees.
Wednesday 10/28: Mostly cloudy conditions are expected with temperatures reaching approximately 70 degrees, providing another relatively mild afternoon; Wednesday night becomes partly cloudy, with temperatures settling around 48 degrees.
Thursday 10/29: Sunny skies return with temperatures climbing to approximately 73 degrees, making Thursday one of the warmest days in the available forecast; mostly clear conditions follow Thursday night, with a low near 48 degrees.
Extended Weather Outlook Friday, Oct. 30, is expected to bring mostly sunny skies and an afternoon high near 73 degrees, followed by partly cloudy conditions and an overnight low around 48 degrees.
Saturday, Oct. 31, should remain partly sunny, with temperatures reaching approximately 73 degrees during the afternoon.
The supplied National Weather Service forecast does not establish reliable temperature or precipitation trends for the full six to 10 day period beyond these dates