Boston, Massachusetts, United States in January

January1°C average high

January has some of the coolest average daytime highs of the year, so pack for fresher conditions.

Warmest monthsJune to September

This stretch sets the upper range for average daytime heat.

January93mm average rain

January sits near Boston's yearly rainfall average, so rain is a normal planning factor rather than an outlier.

Driest monthsJanuary to October

This is the drier part of the year, when outdoor plans usually need less weather flexibility.

January5.1 hours average sun

January is below Boston's yearly sunshine average, so bright-day planning is less reliable than in peak months.

Brightest monthsMay to August

This stretch has the strongest sunshine in the monthly averages.

January5°C average sea

January is one of the coolest sea months, so the water may feel fresher than in peak months.

Warmest seaJuly to September

Sea temperatures are usually near 19°C in this stretch, so swimming comfort is at its strongest.

January25 weather score

January is one of the weakest weather-score months, when the overall mix is less favourable than the rest of the year.

Best weather monthsJuly to August

These months have the strongest weather score in the monthly averages.