Dedham Weather in December

December in Dedham averages 6°C (43°F) during the day and -3°C (27°F) at night. It is the wettest month of the year, with 132 mm (5.2 in) of snow/rainfall on average, so waterproof gear is a must.

Rainfall in Dedham in December

This is the wettest month of the year, so having an umbrella ready is a smart choice. Typically, you can expect about 13 days of snow/rain this month, with 132 mm (5.2 in) on average. 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 Dedham in December

December in Dedham brings typical temperatures with highs around 6°C (43°F) and lows of -3°C (27°F). During December, the winter season is in full swing. Temperatures remain on the cold side all day. A proper warm jacket is worth having, not just for evenings. With overnight lows of -3°C (27°F), temperatures fall below freezing at night. An extra thick blanket can make a real difference if your accommodation runs cold.

Sunshine in Dedham in December

The month brings about 141 hours of sunlight, offering a comfortable mix of sun and overcast.

Wind Speed in Dedham in December

December has wind speeds averaging 7 m/s (14 knots). You can expect generally windy conditions with strong breezes affecting daily routines on typical days. As an average, some days have moderate strong winds while others feature more intense gusts that make walking and movement challenging.

Average water temperature in December

With water temperatures around 8°C (46°F), swimming isn't really an option for most visitors. The cold sets in quickly and a wetsuit won't fully solve it.

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

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• January
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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 Dedham's climate page.

Dedham Temperature in December

Min Temperature -3°C (27°F)  

Max Temperature 6°C (43°F)  

Water Temperature 8°C (46°F) *  

Chance of Rain 43%  

Precipitation 132 mm (5.2 in)  

Rainy days 13 days  

Humidity 66% *  

Windspeed 7 m/s (14 knots) *  

Sunshine 141 hours *  

Percentage Sunshine 50% *  

* Data from: Boston, the United States of America (17 KM, 11 Miles).

What to Wear in Dedham in December

Cold weather calls for smart layering in December. A thermal base layer makes a huge difference in staying warm. Add a wool sweater or fleece, then a wind-resistant outer jacket. Prepare for significant rainfall with proper waterproof clothing and shoes. The water temperature sits at about 8°C (46°F), which is too chilly for most people to enjoy swimming. Leave the swimsuit at home unless you love cold water. It won't hurt to bring your sunglasses along, as you'll see some sunny periods.

What To Do in Dedham 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 Dedham's climate page.

More climate data for Dedham

Temperature Rainfall Sunshine Humidity Wind Speed Water Temp

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