Pennsylvania December Chill: Near 20°F Drop and Snow Hints Into Tuesday

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State College, PA – A quiet, gray morning greets central Pennsylvania as the temperature hangs near 27°F — the kind of air that bites at fingertips and glazes windshields. The calm before the week’s first winter shift has arrived, and it could mean slick roadways for early drivers.

According to the National Weather Service in State College, clouds will linger through the weekend before temperatures dip sharply into the upper teens by Sunday night. Light snow may develop by Tuesday evening, followed by a cold rain expected to move in Wednesday. The quick warm-up will make for an icy mix risk — a pattern familiar to Pennsylvanians during early December.

Drivers along Route 322 and I-99 should prepare for changing conditions late Tuesday into early Wednesday. Wet roads may refreeze overnight, creating black ice on shaded stretches. Even minor accumulations could make morning commutes tricky.

Meteorologists warn that although major snow totals aren’t expected, these small systems often catch drivers off guard. Gusty winds and refreezing surfaces could briefly lower visibility and traction during peak travel times.

Looking Ahead:

  • Sunday: Mostly cloudy, high 37°F, low 18°F.
  • Monday: Sunny but cold, high 26°F, low 9°F.
  • Tuesday: Clouds increase, chance of snow late, high 32°F.
  • Wednesday: Rain likely, high 40°F, lingering drizzle overnight.
  • Thursday: Rain and snow mix possible, highs near 34°F.