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.

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• January
• February
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• May
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For a detailed overview over the year and the best time to visit the United States of America, check out our Somerville's climate page.

Somerville Temperature in December

Min Temperature -2°C (28°F)  

Max Temperature 6°C (43°F)  

Water Temperature 8°C (46°F) *  

Chance of Rain 40%  

Precipitation 132 mm (5.2 in)  

Rainy days 12 days  

Humidity 66% *  

Windspeed 7 m/s (14 knots) *  

Sunshine 141 hours *  

Percentage Sunshine 50% *  

* Data from: Boston, the United States of America (5 KM, 3 Miles).

What to Wear in Somerville in December

Dress warmly and in layers for your trip to Somerville in December. A good base layer system works wonders. Start with good thermal underwear, add something warm like a fleece sweater, then finish with a waterproof jacket on top. Expect heavy rainfall, so bring good rain protection and waterproof bags. With water temperatures around 8°C (46°F), the water is quite cold for swimming. You can skip the swimwear unless you're particularly tough. Bring sunglasses since you'll have some sunny periods throughout the month

What To Do in Somerville in December

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

5/10

Cycling

4/10

Walking

4/10

Camping

1/10

Outdoor sports

4/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit the United States of America, check out our Somerville's climate page.

More climate data for Somerville

Temperature Rainfall Sunshine Humidity Wind Speed Water Temp

See the full Somerville climate overview or explore weather in the United States of America.