South Portland Weather in December

December in South Portland averages 4°C (39°F) during the day and -5°C (23°F) at night. Quite a bit of snow/rainfall is typical this month, with around 140 mm (5.5 in) on average. An umbrella is a good idea.

Rainfall in South Portland in December

Looking at the last 30 years, the data shows about 15 days with snow/rain, averaging 140 mm (5.5 in) for the month. When showers do arrive, they tend to be on the heavier side. Worth being prepared even if rain days are not that numerous.

Temperature in South Portland in December

December in South Portland brings typical temperatures with highs around 4°C (39°F) and lows of -5°C (23°F). During December, the winter season is in full swing. Expect a distinctly cold feel throughout the day, not just overnight. Nights are well below freezing at -5°C (23°F). An extra blanket is a good idea if you feel the cold, especially in older or less well-heated accommodation. Expect freezing temperatures this month, so ensure you have plenty of warm clothing. It's important to be prepared.

Sunshine in South Portland in December

With about 140 hours of sunshine, the area enjoys a nice balance of sun and overcast, creating a pleasant environment.

Average water temperature in December

At 7°C (45°F), the water is very cold. Most people find it too uncomfortable for anything beyond a brief wade.

Our weather planner can help you find worldwide destinations with pleasant weather during this period. June, July, August and September typically offer the best weather for South Portland.