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.