January could end up with as many sub-zero days as Pittsburgh region had in past decade combined The mercury hasn't hit bottom yet. January ranks as one of the most bitingly cold months Western Pennsylvanians can remember, though certainly not a record. A cold snap early in the month made the temperature plummet to 9 below zero near Pittsburgh International Airport with a wind chill that felt like 30 below. State College-based AccuWeather predicts a low of 10 below zero on Tuesday as part of the latest bone-chilling cold spell, one that will extend through at least Jan. 31. “We've...