Waltham Weather in December

During December, Waltham experiences low daytime temperatures of 6°C (43°F) and cooler nights around -4°C (25°F). As the wettest month of the year, and part of the winter season, expect frequent snow/rainfall.

Rainfall in Waltham in December

This month sees the most rain, so carrying an umbrella will ensure you stay dry. You can expect snow/rain on roughly 12 days based on historical data, averaging 129 mm (5.1 in) for the month. 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 Waltham in December

December in Waltham brings typical temperatures with highs around 6°C (43°F) and lows of -4°C (25°F). During December, the winter season is in full swing. It stays cool throughout the day, so warm layers are a good idea from morning to evening. At -4°C (25°F) overnight, frost and ice are likely outside. Indoors, consider packing an extra blanket if you're unsure about the heating.

Sunshine in Waltham in December

The city usually sees around 141 hours of sunlight, indicating a moderately sunny period.

Wind Speed in Waltham 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

The water temperature is only 8°C (46°F) this month, cold enough that most people will want to stay out. Hardy swimmers may manage a quick dip, but it won't be comfortable.

December in Waltham has its charm, but if you're looking for destinations with pleasant temperatures and sunny skies, our weather planner can help you explore other options in the world.