Williamstown Weather in December

Williamstown in December sees low temperatures, with highs around 9°C (48°F) and overnight lows of -1°C (30°F). Snow/rainfall is fairly high at around 131 mm (5.2 in) on average, so pack waterproofs just in case.

Rainfall in Williamstown in December

This month experiences about 12 days of snow/rain according to historical data, averaging 131 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 Williamstown in December

In December, expect low temperatures in Williamstown, with highs of 9°C (48°F) and lows of -1°C (30°F) at night. December is part of winter. It stays cool throughout the day, so warm layers are a good idea from morning to evening. At -1°C (30°F) overnight, frost and ice are likely outside. Indoors, consider packing an extra blanket if you're unsure about the heating.

Sunshine in Williamstown in December

You can expect a moderate amount of sunlight, with approximately 140 hours. This means a pleasant mix of sun and overcast.

December in Williamstown has its charm. However, if you're seeking pleasant, dry and sunny weather, our weather planner can help you explore other destinations in the world.

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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 Williamstown's climate page.

Williamstown Temperature in December

Min Temperature -1°C (30°F)  

Max Temperature 9°C (48°F)  

Chance of Rain 40%  

Precipitation 131 mm (5.2 in)  

Rainy days 12 days  

Humidity 67% *  

Sunshine 140 hours *  

Percentage Sunshine 48% *  

* Data from: Philadelphia, the United States of America (32 KM, 20 Miles).

What to Wear in Williamstown in December

We recommend to layer up for chilly conditions in Williamstown in December. You could start with thermal underwear or a good base layer to keep your core warm on the cooler days this month. Maybe also add a sweater or fleece, and top it off with a windproof jacket. High rain levels are expected, so pack waterproof gear and an umbrella or poncho. Sunglasses could come in handy during the sunnier parts of your trip.

What To Do in Williamstown 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 Williamstown's climate page.

More climate data for Williamstown

Temperature Rainfall Sunshine Humidity

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