Tuesday, May 26, 2026, in Pittsburgh is starting mostly cloudy and muggy, about 59°F this morning, and will climb into the low 80s by this afternoon. Partly sunny skies are expected with a slight chance of scattered showers or a rumble of thunder after about 2 p.m. local time. The bigger concern arrives Wednesday, May 27, when rounds of heavier, training rain could produce pockets of urban and creek flooding in some neighborhoods.
Afternoon And Tonight
Highs should top out near 82°F with light southwest winds and rising humidity, so expect it to feel pretty sultry in spots. There is only a small, roughly 20 percent, chance of a brief shower or thunder this afternoon, but rain chances increase tonight as the stalled boundary lifts back north. Lows should be near 67°F. Most locations will see only a few tenths of an inch of rain unless an individual storm trains over the same spot.
Wednesday Flood Risk
Wednesday, May 27, looks to be the wetter day. Showers and thunderstorms are expected to become more numerous and could produce heavier, training rainfall, especially south of the city and along the I‑70 corridor. The National Weather Service in Pittsburgh notes that rainfall amounts of an inch or more are increasingly possible in spots and that a Flood Watch may be needed, so keep an eye on updates through the office's forecast page.
Plan For The Commute
Expect soggy roads and slower commutes Wednesday, so build in some extra travel time and avoid driving through standing water. If you have outdoor plans for Wednesday afternoon, line up a backup. Conditions should trend cooler and drier by Thursday, with highs returning to the mid‑ to upper‑70s.
