Boston Weather in January

Boston in January sees low daytime temperatures of 3°C (37°F) and nighttime lows of -5°C (23°F). Rainfall is fairly high this month at around 90 mm (3.5 in), so pack a rain jacket to stay dry.

Rainfall in Boston in January

On average, there are about 12 days with snow/rain during this month, averaging 90 mm (3.5 in). Rainfall intensity is on the higher side this month. Expect more substantial showers rather than light, passing rain.

Temperature in Boston in January

January in Boston brings typical temperatures with highs around 3°C (37°F) and lows of -5°C (23°F). January marks the winter season. It stays very cold throughout much of the day, so warm winter clothing is essential. With overnight lows of -5°C (23°F), temperatures fall below freezing at night. An extra thick blanket can make a real difference if your accommodation runs cold. It's generally the coldest month of the year, making it essential to pack warm layers and winter accessories.

Sunshine in Boston in January

The area enjoys a balanced 162 hours of sunlight, ensuring it's neither too overcast nor too sunny.

Wind Speed in Boston in January

Average wind conditions reach 7 m/s (14 knots) in January. This indicates a windy month with strong breezes dominating the weather pattern. Remember this is an average: while most days are notably windy, some calmer periods occur alongside more stormy conditions.

Average water temperature in January

With water temperatures around 5°C (41°F), swimming isn't really an option for most visitors. The cold sets in quickly and a wetsuit won't fully solve it.

January in Boston has its charm, but if you're looking for destinations with pleasant temperatures and sunny skies, our weather planner can help you explore other options in the world.