Philadelphia Weather in December

Philadelphia in December sees low daytime temperatures of 9°C (48°F) and nighttime lows of 1°C (34°F). Rainfall is fairly high this month at around 123 mm (4.8 in), so pack a rain jacket to stay dry.

Rainfall in Philadelphia in December

Analyzing past climate data, one can expect approximately 12 days of rain, averaging 123 mm (4.8 in). When it rains this month, it tends to come down fairly heavily. Showers can be substantial even if they don't last all day.

Temperature in Philadelphia in December

In December, Philadelphia sees low temperatures, with highs of 9°C (48°F). Nights drop to around 1°C (34°F). December is part of winter. Temperatures remain on the cold side all day. A proper warm jacket is worth having, not just for evenings. With lows around 1°C (34°F), nights are cold. The upside is that cool, crisp nights are often the best for a deep sleep.

Sunshine in Philadelphia in December

The area experiences a moderate amount of sunshine, with approximately 140 hours of sunlight expected. This means a decent mix of sun and overcast.

Average water temperature in December

The water temperature is only 9°C (48°F) this month, cold enough that most people will want to stay out. Hardy swimmers may manage a quick dip, but it won't be comfortable.

December in Philadelphia has its charm, but if you're looking for destinations with pleasant temperatures and sunny skies, our weather planner can help you explore other options in the world.