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United States weather

Weather in Boston, Massachusetts for December 2025

Your guide to Boston weather in December - trends and predictions

    Snow Forecast ❄️

  • Boston typically experiences moderate snowfall in December, with an average of 7 snowy days.
    According to Boston snow forecast for December 2025, 5 snowy days are expected in the next 2 weeks. The closest date with snow is Sunday, December 14.

    • Temperatures

  • Until now, December 2025 in Boston is cooler than usual, with temperatures averaging 2.5 °F, this is -4.3 °F below the typical seasonal average.

  • The forecast for the next days in Boston predicts a temperature of 2.3 °F, which is cooler than the historical average.

  • In general, the average temperature in Boston at the beginning of December is 6.1 °F. As the month progressed, temperatures tended to noticeably cool down, reaching an average of 3.3 °F by the end of December.

    • More

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
8
Dry days
Average rainy days
16
Rainy days
Average snowy days
7
Snow days
Average temperatures
6°/0°
Temperatures
Average wind speed
19 km/h
Avg max wind
Average humidity
71 %
Avg humidity

Boston Weather December

Move between months or click on a day
November
January
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Overcast
6°
2
Patchy rain possible
8°
3
Sunny
8°
4
Overcast
5°
5
Partly cloudy
5°
6
Heavy rain at times
6°
7
Sunny
5°
8
Patchy rain possible
6°
9
Cloudy
5°
10
Fog
8°
11
Heavy rain
11°
12
Cloudy
8°
13
Cloudy
6°
14
Light snow
0°
15
Sunny
-1°
16
Moderate or heavy snow showers
1°
17
Partly cloudy
6°
18
Patchy rain possible
4°
19
Patchy rain possible
10°
20
Moderate snow
1°
21
Patchy rain possible
12°
22
Sunny
-0°
23
Patchy rain possible
8°
24
Sunny
-3°
25
Partly cloudy
-4°
26
Heavy snow
-1°
27
Sunny
-1°
28
Light rain
7°
29
Partly cloudy
6°
30
Overcast
8°
31
Heavy rain at times
8°

Temperatures trend during December in Boston

See the weather trend as well as the moving average line

December weather in Boston day by day

Click on a date for more information
November January
Date Weather Temperatures Rain Snow More
Dec. 1 Overcast
Overcast
 6° /0° 2.3 mm 0 cm
Dec. 2 Patchy rain possible
Patchy rain possible
 8° /1° 25.2 mm 0 cm
Dec. 3 Sunny
Sunny
 8° /0° 13.2 mm 0.4 cm
Dec. 4 Overcast
Overcast
 5° /-1° 0.5 mm 0 cm
Dec. 5 Partly cloudy
Partly cloudy
 5° /-2° 5.5 mm 0.8 cm
Dec. 6 Heavy rain at times
Heavy rain at times
 6° /0° 1.5 mm 0.3 cm
Dec. 7 Sunny
Sunny
 5° /-1° 4.1 mm 0 cm
Dec. 8 Patchy rain possible
Patchy rain possible
 6° /-1° 1.2 mm 0.7 cm
Dec. 9 Cloudy
Cloudy
 5° /-2° 5.1 mm 0 cm
Dec. 10 Fog
Fog
 8° /2° 6.7 mm 0.8 cm
Dec. 11 Heavy rain
Heavy rain
 11° /1° 20.2 mm 0 cm
Dec. 12 Cloudy
Cloudy
 8° /0° 7.6 mm 0 cm
Dec. 13 Cloudy
Cloudy
 6° /-1° 0.1 mm 0 cm
Dec. 14 Light snow
Light snow
 0° /-6° 3.2 mm 1.4 cm
Dec. 15 Sunny
Sunny
 -1° /-9° 0 mm 0 cm
Dec. 16 Moderate or heavy snow showers
Moderate or heavy snow showers
 1° /-5° 3.5 mm 2.5 cm
Dec. 17 Partly cloudy
Partly cloudy
 6° /-2° 0 mm 0 cm
Dec. 18 Patchy rain possible
Patchy rain possible
 4° /-2° 0.8 mm 0 cm
Dec. 19 Patchy rain possible
Patchy rain possible
 10° /-1° 0.8 mm 0 cm
Dec. 20 Moderate snow
Moderate snow
 1° /-1° 1.1 mm 0 cm
Dec. 21 Patchy rain possible
Patchy rain possible
 12° /1° 1.7 mm 0 cm
Dec. 22 Sunny
Sunny
 0° /-3° 0 mm 0 cm
Dec. 23 Patchy rain possible
Patchy rain possible
 8° /-2° 0.2 mm 0 cm
Dec. 24 Sunny
Sunny
 -3° /-9° 0 mm 0 cm
Dec. 25 Partly cloudy
Partly cloudy
 -4° /-10° 0 mm 0 cm
Dec. 26 Heavy snow
Heavy snow
 -1° /-6° 4.3 mm 2.2 cm
Dec. 27 Sunny
Sunny
 -1° /-6° 0 mm 0 cm
Dec. 28 Light rain
Light rain
 7° /-1° 4.4 mm 0 cm
Dec. 29 Partly cloudy
Partly cloudy
 6° /0° 3.2 mm 0 cm
Dec. 30 Overcast
Overcast
 8° /1° 10.2 mm 0 cm
Dec. 31 Heavy rain at times
Heavy rain at times
 8° /3° 3.6 mm 0 cm
Next
Important Notice
Our weather forecast for Boston in December is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Boston forecast closer to your planned date for the most up-to-date weather information.
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Boston in December - FAQ

What are the expected maximum and minimum temperatures in Boston during December?
Prepare for cooler days with highs just around 6° and colder nights, dipping below 0°.
How much rainfall should be expected in Boston during December?
Significant rainfall exceeding 155 mm is expected in Boston during December, occurring over more than 16 days. Preparing for wet conditions is recommended in your planning.
Will it snow in Boston in December 2025?
Boston experiences an average snowfall of 7.957 cm during December, occurring over 7 days.
What are the typical wind conditions in Boston during December?
The average wind speed in Boston during December is 19 km/h, suggesting breezy to windy conditions, depending on your activities.

Boston snow forecast December 2025

Track daily snowfall levels and discover Boston’s snowy potential this December ❄️
On average, Boston sees 7 snowy days during December, with approximately 8 cm of total snowfall.

December rainfall patterns in Boston

Explore the daily rainfall trends and prepare for Bostons December weather 💧
Typically, Boston has 16 rainy days in December with a total of 155 mm of rainfall.

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Get accurate weather forecasts for Boston, located at latitude 42.358 and longitude -71.06. Stay updated with localized weather information tailored for Boston.

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