Pittsburgh is expected to see mostly cloudy skies early Wednesday, then gradual clearing and mostly sunny skies this afternoon. Highs are forecast near 72 degrees, according to the National Weather Service’s updated Pittsburgh forecast.
The pleasant stretch continues Thursday, when sunshine and a high near 74 will make it feel more like early fall’s greatest hits than late October. Thursday night stays mild as temperatures dip to roughly 54 degrees under increasing clouds, according to the National Weather Service forecast.
A few days of unusually mild weather are a short-term pattern, not a measure of the region’s long-term climate trend.
Halloween Forecast Looks Quiet And Dry
Saturday’s Halloween forecast looks quiet and dry, according to the latest Pittsburgh point forecast from the National Weather Service.
Pittsburgh’s Halloween weather has swung widely in the historical record. The National Weather Service lists 80 degrees in 2024 as the city’s hottest Halloween, while the coldest was 20 degrees in 1887. Halloween 2019 brought 1.97 inches of rain, the wettest on record, and 1993 was the snowiest, with 6.6 inches. This year’s forecast is milder and drier than those extremes, with trick-or-treat temperatures expected in the low 60s. The NWS Pittsburgh office’s Halloween climatology includes those records and this year’s outlook.
Sunday stays unusually warm for the season, reaching about 70 degrees, though mostly cloudy skies will replace the weekend sunshine. Rain is expected late Sunday into Monday, with an overnight low near 50, as a weak disturbance approaches the Ohio Valley, according to the Pittsburgh forecast and the NWS forecast discussion.
What Long-Term Records Show
Long-term records show Pennsylvania has warmed, though not equally across seasons. NOAA’s 2025 Pennsylvania State Climate Summary reports that annual average temperatures have risen more than 2°F since the beginning of the 20th century, with most of the warming in winter and spring and less in summer and fall. The same summary says annual precipitation has generally been above average since the 1970s, primarily because of increases in summer and fall precipitation. These statewide patterns provide climate context, not an explanation or prediction for this week’s rain.
Rain Chances Build Next Week
Light rain is expected late Sunday into Monday, according to the National Weather Service’s updated Pittsburgh forecast and its local forecast discussion.
The late-week calm does not rule out rain early next week, but the latest outlook keeps the risk of a substantial soaking limited. The National Weather Service puts the chance of more than a half-inch of rain in any 48-hour period below 30% as a weak disturbance approaches; it says light rain is expected late Sunday into Monday. The broader forecast still leaves room for additional rain chances later in the week as the system’s track develops. The Pittsburgh forecast discussion describes the timing and rainfall probabilities.
The National Weather Service says the risk of hazardous weather remains low through the weekend, with temperatures running around 10 degrees above average. No watches, warnings or advisories are posted for the region.
