Weather in Boston in December 2024
Average weather
Average temperature in Boston in December
The temperature in December is +8°C on average, with a range between a maximum of +17°C during the day and a minimum of -6°C at night.
The average maximum temperature goes down 35% by the end of the month, compared with the beginning of the month, from +12°C to +4°C.
Is Boston warm or cold in December?
Boston is typically cool in December.
Maximum temperatures go down compared to the previous month from +11°C to +5°C. The minimum temperature also goes down from +3°C to -2°C.
Pack a sweater and a jacket as there will be cooler temperatures.
December is one of the coolest months in Boston, here is the comparison with other months:
Water temperature in Boston in December
Water in Boston in December is Cold. It varies from +5°C to +10°C, with an average of +8°C. Note that the air temperature is lower than the water temperature, averaging around +5°C.
In December, water temperatures are average relative to the rest of the year:
Can you swim in Boston in December?
Climate in Boston in December
| November | December | January | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +11°C | +5°C | +3°C | ||||
| Min. temperature | ||||||
| -13°C | -20°C | -24°C | ||||
| Max. temperature | ||||||
| +25°C | +22°C | +22°C | ||||
| Rainfall | ||||||
| 94 mm | 84 mm | 62 mm | ||||
| Wind | ||||||
| 4 m/s | 4 m/s | 4 m/s | ||||
| Avg. water temperature | ||||||
| +11°C | +8°C | +5°C | ||||
| Humidity | ||||||
| 66% | 65% | 64% | ||||
| Air pressure | ||||||
| 1017 HPa | 1016 HPa | 1015 HPa | ||||
| Sunny days | ||||||
| 5 | 4 | 5 | ||||
| Cloudy days | ||||||
| 12 | 12 | 11 | ||||
| Rainy days | ||||||
| 12 | 9 | 6 | ||||
| Snowy days | ||||||
| 1 | 6 | 9 | ||||
December weather is still as ok as in November. It’s getting colder in December. From +11°C in the day, the average maximum temperature lowers to +5°C. As December arrives, the amount of rainfall goes down. On average, the rainfall volume decreases from 94 mm to 84 mm. It feels drier, as humidity decreases from 66% to 65%. The average wind speed doesn’t change much during December, staying around 4 m/s. The days becoming less sunny, going from 5 sunny days in November to 4 in December.
January brings much the same weather, it remains ok.
Wind
The average wind speed is 4 m/s getting up to 8 m/s which is a medium breeze. You can feel it, especially getting out of the water.
The average wind speed in Boston is gradually decreasing during December, going from 5 m/s to 4 m/s over the course of the month.
Rain
Snow
December is one of the snowiest months in Boston.
Here’s how December is compared with other months in the amount of snow, total mm:
How was the weather last December in Boston?
Climate Change over Years
The climate in Boston in December has not changed much over the last 43 years.
The average temperature was the lowest in 1992 (+14°C) and the highest in 2022 (+17°C). The driest year was 2016 with only 702 mm of rainfall, and the wettest year was 2021 with 2022 mm.
FAQ
Is December a good time to visit Boston?
Can you sunbathe in Boston in December?
Can you swim in Boston in December?
Is Boston rainy in December?
Is it sunny in Boston in December?
Other cities in USA
Monthly weather in Boston
Source of the data
For this page, we’ve looked at the typical weather in Boston, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.