Somerville Weather in December

During December, Somerville experiences low daytime temperatures of 6°C (43°F) and cooler nights around -2°C (28°F). As the wettest month of the year, and part of the winter season, expect frequent snow/rainfall.

Rainfall in Somerville in December

This month sees the most rain, so carrying an umbrella will ensure you stay dry. This month experiences about 12 days of snow/rain according to historical data, averaging 132 mm (5.2 in). The rain this month tends to fall in heavier spells rather than light drizzle. When it rains, showers can be significant.

Temperature in Somerville in December

Temperatures in Somerville in December top out at 6°C (43°F) and drop to -2°C (28°F) overnight. During December, you'll experience the winter season. Expect a cold feel throughout the day, not just in the mornings and evenings. Warm layers are essential. At -2°C (28°F) overnight, frost and ice are likely outside. Indoors, consider packing an extra blanket if you're unsure about the heating.

Sunshine in Somerville in December

The city usually sees around 141 hours of sunlight, indicating a moderately sunny period.

Wind Speed in Somerville in December

Wind speeds average 7 m/s (14 knots) during December. At this speed, you experience strong wind that can make entire trees sway and create resistance when walking. Since this is an average, expect variation from moderate windy periods to particularly gusty days when umbrellas become difficult to control.

Average water temperature in December

At 8°C (46°F), the water is very cold. Most people find it too uncomfortable for anything beyond a brief wade.

If you're looking for dry conditions and comfortable temperatures, December may not be the ideal month to visit Somerville. Our weather planner can help you explore destinations with more pleasant weather conditions.