Chelsea Weather in December

Chelsea in December sees low daytime temperatures of 6°C (43°F) and nighttime lows of -1°C (30°F). With the highest rainfall of the year it is wise to pack an umbrella and expect frequent showers.

Rainfall in Chelsea in December

With this being the wettest month, keeping an umbrella on hand might save you from getting wet from a sudden shower. Climate statistics over the past 30 years suggest around 12 days of snow/rain, with 132 mm (5.2 in) average 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 Chelsea in December

Chelsea in December gets highs of 6°C (43°F) during the day and drops to -1°C (30°F) at night. This month falls in the winter season. The days stay cool from start to finish. Layering up well will make outdoor time much more comfortable. Nights drop below freezing to -1°C (30°F). An extra blanket is worth packing if you're unsure about the heating where you're staying.

Sunshine in Chelsea in December

The month experiences a moderate amount of sunlight, with 141 hours of sunshine. This provides a nice balance between sunshine and clouds.

Wind Speed in Chelsea in December

Average wind conditions reach 7 m/s (14 knots) in December. This indicates a windy month with strong breezes dominating the weather pattern. Remember this is an average: while most days are notably windy, some calmer periods occur alongside more stormy conditions.

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 prefer dry days with pleasant temperatures, December may not be the ideal month to visit Chelsea. Our weather planner can help you explore destinations with more pleasant weather conditions.

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 Chelsea's climate page.

Chelsea Temperature in December

Min Temperature -1°C (30°F)  

Max Temperature 6°C (43°F)  

Water Temperature 8°C (46°F) *  

Chance of Rain 40%  

Precipitation 132 mm (5.2 in)  

Rainy days 12 days  

Humidity 66% *  

Windspeed 7 m/s (14 knots) *  

Sunshine 141 hours *  

Percentage Sunshine 50% *  

* Data from: Boston, the United States of America (2 KM, 1 Miles).

What to Wear in Chelsea 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. Expect water temperatures of around 8°C (46°F), which is definitely too cold for comfortable swimming. Your luggage space is better used for other items. Sunglasses could come in handy during the sunnier parts of your trip.

What To Do in Chelsea 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 Chelsea's climate page.

More climate data for Chelsea

Temperature Rainfall Sunshine Humidity Wind Speed Water Temp

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