Boston in January
In January, Boston averages 2°C (36°F) during the day and -6°C (21°F) at night, with around 10 days of rain (88 mm total).
Off-peakConditions are cold — pack winter layers. Plan for unsettled weather and bring rain gear. Snowfall occurs on roughly 10 days.
January in Boston is outside the typical sweet spot for sightseeing weather. It can still be a great time to visit if you have specific reasons (festivals, off-season pricing, etc.).
How January compares to the rest of the year in Boston
January is one of the coolest months in Boston (12th of 12) and moderately rainy compared to the rest of the year (7th of 12). Daytime temperature runs 13°C below the annual average (15°C). January runs 3°C cooler than December (5°C) and warms a further 1°C into February (3°C).
January sunrise & sunset in Boston
Times shown for Boston local time (America/New_York), calculated for the 15th of January. They shift by a few minutes day to day across the month.
Photography light in Boston — January
Golden-hour and blue-hour windows for the 15th of January, in Boston's local time. Use these for soft warm light (golden) or cool architectural twilight (blue).
📅 When to book — Boston in January
Travel writers usually only tell you when to go. Here's when to book flights and lodging for the best mix of price and availability, based on January's tier (Off-peak) and Boston's popularity.
January in United States — events that affect travel
Known cultural, religious, or national events that surge prices, fill hotels, or close businesses during this month. Plan around them, or build your itinerary around the ones you'd like to see.
Major travel surge plus widespread Dec 24-26 and Jan 1 business closures.
Plan: Book flights and hotels well ahead; expect many restaurants/shops closed Dec 25 and Jan 1.
Crowds & pricing — January in Boston
This is off-peak for Boston — the lowest prices of the year and the fewest crowds, but with real trade-offs: some restaurants, hotels, and beach businesses may close for the season; weather conditions can make outdoor activities unpredictable; and a handful of seasonal sights run reduced hours or close entirely. Great if you prefer a quiet local rhythm and don't mind the climate giving you reasons to choose indoor activities.
Why this tier: challenging tourism weather
Sun & mosquito risk — January in Boston
UV is a clear-sky sea-level estimate — clouds, altitude, and reflective surfaces (snow, water) shift it ±30%. Mosquito risk is climate-derived only; for current disease advisories (dengue, malaria, zika) check the CDC or WHO travel pages before your trip.
❄️ Snowy — Boston in January
Gear: Frequent snowfall. Waterproof boots and a real insulated coat are essential — not a fashion peacoat.
Sea temperature in Boston — January
Across the year Boston's sea swings from 3.5°C (February) to 19.6°C (August) — January sits at 4.2°C.
Boston in other months
| Month | Avg high | Avg low | Rainfall | Rain days | Snow days |
|---|---|---|---|---|---|
| January | 2°C / 36°F | -6°C / 21°F | 88 mm | 10 | 10 |
| February | 3°C / 37°F | -5°C / 23°F | 88 mm | 10 | 9 |
| March | 7°C / 45°F | -1°C / 30°F | 104 mm | 11 | 5 |
| April | 14°C / 57°F | 4°C / 39°F | 92 mm | 11 | 1 |
| May | 19°C / 66°F | 9°C / 48°F | 88 mm | 11 | 0 |
| June | 25°C / 77°F | 15°C / 59°F | 95 mm | 11 | 0 |
| July | 28°C / 82°F | 18°C / 64°F | 84 mm | 9 | 0 |
| August | 27°C / 81°F | 17°C / 63°F | 94 mm | 9 | 0 |
| September | 23°C / 73°F | 13°C / 55°F | 85 mm | 9 | 0 |
| October | 17°C / 63°F | 7°C / 45°F | 96 mm | 10 | 0 |
| November | 11°C / 52°F | 2°C / 36°F | 108 mm | 11 | 1 |
| December | 5°C / 41°F | -3°C / 27°F | 106 mm | 12 | 7 |
Other cities with similar January weather
🌍 See the full ranked list of climate twins for Boston in January →
Frequently asked questions
How hot is Boston in January?
In January, Boston averages a high of 2°C (36°F) and a low of -6°C (21°F) — generally cold.
Does it rain a lot in Boston in January?
January can be fairly wet in Boston, with about 10 rainy days on average and roughly 10 snow days.
Is January a good time to visit Boston?
January is cold. It suits travelers who are comfortable with cold weather; check the month-by-month ranking to compare it against the rest of the year.
What should I pack for Boston in January?
Pack heavy winter layers, a coat, hat and gloves, plus a compact umbrella or rain jacket. See the full January packing list for Boston for a complete, climate-based checklist.
Check the live 10-day forecast and sunrise/sunset.