Williamstown
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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.

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).

Williamstown Weather by Month

Pick a month to see the average temperature, rainfall and sunshine in Williamstown - and find the best time to visit.

Best Places in the United States of America in December

Find out more about the weather in the United States of America and which places have the best travel conditions in this month. See all of the United States of America in December →

perfect weather
pleasant
tolerable
unpleasant
poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).

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

Williamstown 3-Day Forecast

Popular in December

Where to go in December - average daytime high across popular destinations.

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