Temperatures in December
It's cold in December in Boston with an average temperature of 4°C. Temperatures this month range from a low of 1°C to a high of 7°C. At night, you can expect temperatures between -4°C and 2°C.
Max and Min Temperatures per Day
This chart shows the daily maximum and minimum temperatures in degrees Celsius for Boston in December. The red line indicates the max temperatures, and the blue line shows the minimums.
Start of December
The month of December starts in Boston with cold temperatures, averaging around 6°C during the day and nights close to 1°C. A few showers might pop up in the first days of the month, but the weather remains mostly sunny and dry.
Mid-December
By mid-December, the average daytime temperature drops to around 3°C, with nights close to -2°C. There might be a few showers during this period, but plenty of dry days with sunshine too. Wear a thick winter coat, jumper, long trousers, hat, and gloves.
End of December
By the end of December, the average daytime temperature in Boston will be around 4°C, with nights close to -2°C. There’s a significant chance of many days with precipitation. Wear a thick winter coat, jumper, long trousers, hat, and gloves.
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Precipitation in December
In December, there is an average of 113 mm of precipitation, spread over 14 days. Of the total precipitation, about 104 cm falls as snow in December. The wind speed is around 4 Bft, mostly coming from the Southwest.
The average precipitation chance is 45% per day this month. Though it seems average, the weather’s variable. Some days have higher, others lower precipitation chances.
Precipitation Chance
This chart shows the daily precipitation chance (in percentages) in December for Boston. 0% means it never rained on that day in the past 10 years, and 100% means it rained every day. All values in between represent the average chance of precipitation on that day.
Boston in December |
London | ||
|---|---|---|---|
 Average Temperature |
4°C | 9°C | |
 High Temp |
7°C | 11°C | |
| Low Temp |
1°C | 8°C | |
 Total Precipitation |
113 mm | 67 mm | |
| Rainy Days |
14 days | 10 days | |
 Total Snowfall |
104 cm | 1,2 cm | |
| Snowy Days |
22 days | 1 day | |
November
UV index
The UV index is a maximum of 1 this month. That's a low value on the intensity scale of 1 to 11. The risk of sunburn is minimal at this time.
Is December a good time to visit Boston?
After some sun? Then December isn’t the best time to be in Boston. There’s too much chance of rain this month.
Temperature records for Boston in December
With 22°C, Boston hit the highest temperature in the last 10 years in December 2015. The lowest daytime temperature in this month was -13°C in 2017. The extreme night temperatures ranged from a low of -17°C to a high of 13°C.
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Daily Temperature in December in Boston
This chart shows the average daily temperatures, both day and night, for each day in December in Boston, measured in degrees Celsius. The red line represents the maximum temperatures, while the blue line shows the minimums. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, gives an overview of the average daily temperatures during this month.
Daily Precipitation in December in Boston
The chart below shows the average daily precipitation in December for Boston, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are shown at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that rain is more likely. But it’s still an average, so each day can be different. Based on historical weather data for December, you can expect around 14 days of rain in Boston.
Daily Snowfall in December in Boston
This chart shows the average daily snowfall in December in Boston, measured in centimetres. The bottom of the chart shows the days of the month. The data is based on historical measurements and gives an idea of the average snowfall in December.
Daily UV Index in December in Boston
This chart shows the average daily UV index in December in Boston, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Temperature in December in Boston Over the Years
This chart shows the average temperature in December in Boston, measured in degrees Celsius, over the past years.
Total Precipitation in December in Boston Over the Years
This chart shows the average precipitation in December in Boston, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail.
Snowfall in December in Boston per year
This chart shows the average snowfall in December in Boston, measured in centimetres, over the past years.
Daily climate in December for Boston
Click on a specific day in December for detailed info on the typical weather on that day in Boston. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in December in Boston
Have you been to Boston in December?
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Average Weather in Boston by Month
Click on a month below to see detailed weather info for Boston. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
