Weather in Boston in January
How warm is it in Boston in January?
In January the typical daytime high in Boston is 1.9 °C on average, from 2.6 °C at the start to 1.7 °C at the end of the month.
That is 2.4 °C cooler than in December and 1.1 °C cooler than in February.
The last 10 years were 1.8 °C warmer than more than 40 years ago.
Click a day for more: afternoon and night, the usual range, records and how fast it is warming.
The average of the weather stations Blue Hill Coop (17 km) and Nashua (59 km); nearer ones count more.