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.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Waltham's climate page.
Waltham Temperature in December
Min Temperature
-4°C (25°F)
Max Temperature
6°C (43°F)
Water Temperature
8°C (46°F) *
Chance of Rain
40%
Precipitation
129 mm (5.1 in)
Rainy days
12 days
Humidity
66% *
Windspeed
7 m/s (14 knots) *
Sunshine
141 hours *
Percentage Sunshine
50% *
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
What to Wear in Waltham in December
Dress warmly and in layers for your trip to Waltham in December. A good base layer system works wonders. Start with good thermal underwear, add something warm like a fleece sweater, then finish with a waterproof jacket on top. Expect heavy rainfall, so bring good rain protection and waterproof bags. 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. Bring sunglasses since you'll have some sunny periods throughout the monthWhat To Do in Waltham in December
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Waltham's climate page.
Temperature Rainfall Sunshine Humidity Wind Speed Water Temp
See the full Waltham climate overview or explore weather in the United States of America.
