Pittsburgh is starting Tuesday, October 20, with clear skies and temperatures around 40 degrees, but the chilly opening will give way to a sunny afternoon near 66. Rain is not part of the plan, and light north winds should keep the day comfortable once the morning chill burns off.
Warm Sun, Cool Night
Temperatures should rise, with a high near 66. Tonight stays clear with a low near 40, so anyone heading out late will want a jacket even after a pleasantly mild afternoon. The National Weather Service in Pittsburgh expects light winds, generally 1 to 6 mph today, easing to around 3 mph overnight.
Air Quality Alert Targets Mon Valley
A Code Orange Air Quality Alert remains in effect for the Mon Valley through 4 p.m. Tuesday. The Pennsylvania Department of Environmental Protection says pollution may become unhealthy for sensitive groups, including children, older adults and people with asthma or heart and lung conditions; strenuous outdoor exercise is the main thing to limit. More details are available from Pennsylvania DEP.
Sunny Stretch Runs Through Weekend
Wednesday and Thursday stay sunny with highs near 64 and 65, followed by low-to-mid-60s highs Friday through Sunday under a generally dry, sunny pattern. That continues the dry, sunny pattern described in Hoodline's Monday forecast while adding Tuesday's air-quality concern.
Frost Risk Stays Nearby
Patchy frost remains possible in colder spots around the region early Wednesday and Thursday, when overnight lows dip to about 38 degrees. A Frost Advisory is in effect until 9 a.m. Tuesday for parts of southwestern Pennsylvania and northern West Virginia, though the advisory is not citywide. Gardeners with tender fall plants should keep an eye on colder valleys later this week.
