Boston, the historic capital of Massachusetts, is a vibrant city known for its rich culture, iconic landmarks, and distinct four-season climate. Understanding Boston’s weather by month can help travelers plan the perfect trip—whether you’re seeking snowy winters, blooming springs, sunny summers, or colorful autumns.
This complete guide breaks down Boston’s weather throughout the year, highlighting temperatures, rainfall, and travel tips for each month.
Overview of Boston’s Climate
Boston has a humid continental climate, characterized by:
- Cold, snowy winters
- Mild, rainy springs
- Warm, humid summers
- Cool, crisp autumns
Average temperatures range from -5°C (23°F) in winter to 28°C (82°F) in summer. Weather can change quickly, so layering clothing is always recommended.
Boston Weather by Month
| Month | Avg Low °C (°F) | Avg High °C (°F) | Travel Notes |
|---|---|---|---|
| January | -6°C (21°F) | 2°C (36°F) | Coldest month; fewer tourists |
| February | -5°C (23°F) | 3°C (37°F) | Budget-friendly, winter conditions |
| March | 0°C (32°F) | 9°C (48°F) | Unpredictable, early spring |
| April | 4°C (39°F) | 15°C (59°F) | Cool, rainy, fewer crowds |
| May | 10°C (50°F) | 21°C (70°F) | Great weather, flowers bloom |
| June | 15°C (59°F) | 26°C (79°F) | Ideal for outdoor sightseeing |
| July | 18°C (64°F) | 29°C (84°F) | Hottest month, peak tourism |
| August | 17°C (63°F) | 28°C (82°F) | Warm, humid, busy season |
| September | 13°C (55°F) | 24°C (75°F) | Excellent weather, fewer crowds |
| October | 7°C (45°F) | 18°C (64°F) | Fall foliage, very popular |
| November | 2°C (36°F) | 12°C (54°F) | Cooler, early winter feel |
| December | -1°C (30°F) | 6°C (43°F) | Festive, cold, holiday travel |
Winter in Boston (December – February)
Winter in Boston is cold, atmospheric, and historic. Snow transforms landmarks like Boston Common and Beacon Hill into postcard scenes, but temperatures can be harsh.
December
- Temperature: -2°C to 5°C (28°F–41°F)
- Weather: Cold, festive, occasional snow
- Travel vibe: Holiday lights, Christmas markets, cozy cafes
- Tip: Pack warm coats and waterproof boots
January
- Temperature: -6°C to 2°C (21°F–36°F)
- Weather: Coldest month, frequent snowstorms
- Travel vibe: Quiet tourism season, lower hotel prices
- Best for: Snow lovers and budget travelers
February
- Temperature: -5°C to 3°C (23°F–37°F)
- Weather: Snowy and windy
- Highlight: Valentine’s trips, winter festivals
- Caution: Possible flight delays due to storms
Spring in Boston (March – May)
Spring brings Boston back to life with blooming flowers, warming temperatures, and outdoor cafés reopening.
March
- Temperature: 1°C to 8°C (34°F–46°F)
- Weather: Unpredictable, rainy/snowy mix
- Travel tip: Bring layers and waterproof clothing
April
- Temperature: 5°C to 14°C (41°F–57°F)
- Weather: Cool, fresh, greener scenery
- Events: Boston Marathon (mid-April)
- Best for: Cultural tourism and photography
May
- Temperature: 10°C to 20°C (50°F–68°F)
- Weather: Mild and sunny
- Perfect for: Walking the Freedom Trail, visiting Harvard University, outdoor dining
Summer in Boston (June – August)
Summer is peak travel season with long days, festivals, and waterfront activities.
June
- Temperature: 15°C to 25°C (59°F–77°F)
- Weather: Pleasant, low humidity
- Best for: Sightseeing, harbor cruises, museums
July
- Temperature: 18°C to 28°C (64°F–82°F)
- Weather: Hot, humid
- Events: Independence Day fireworks on the Charles River
- Tip: Stay hydrated, plan indoor attractions midday
August
- Temperature: 18°C to 27°C (64°F–81°F)
- Weather: Warm, occasional storms
- Vibe: Tourist crowds, beach trips to Cape Cod nearby
Fall in Boston (September – November)
Fall is widely considered the best time to visit Boston thanks to mild temperatures and stunning autumn foliage.
September
- Temperature: 14°C to 23°C (57°F–73°F)
- Weather: Comfortable, sunny
- Best for: City tours, student energy returns
October
- Temperature: 8°C to 17°C (46°F–63°F)
- Weather: Cool, colorful
- Highlight: Fall foliage, Halloween events
- Top month for photographers 📸
November
- Temperature: 2°C to 10°C (36°F–50°F)
- Weather: Cool, early winter feel
- Travel vibe: Calm, fewer tourists
- Tip: Start packing winter clothes
Best Time to Visit Boston
- Best overall: May, June, September, and October
- Best for budget travelers: January–March (except holidays)
- Best for outdoor activities: Late spring to early fall
- Best for fall scenery: October
Boston Weather FAQs (Travelers’ Guide)
- What is the best month to visit Boston for good weather?
May, June, September, and October offer the most pleasant temperatures and minimal weather extremes. - What is the coldest month in Boston?
January is typically the coldest month, with frequent snow and freezing temperatures. - What is the hottest month in Boston?
July is usually the hottest month, with high temperatures and noticeable humidity. - Does Boston get a lot of snow?
Yes, Boston receives significant snowfall in winter, especially from December to February. - Is Boston very rainy?
Rain is spread fairly evenly throughout the year, with spring being slightly wetter. - Is Boston weather unpredictable?
Yes, weather can change quickly, especially in spring and fall, so layering is recommended. - What should I wear in Boston in winter?
A heavy coat, boots, gloves, scarf, and thermal layers are essential. - Is summer in Boston humid?
Yes, summers can be warm and humid, particularly in July and August. - Does Boston have four distinct seasons?
Absolutely—Boston experiences clear winter, spring, summer, and fall seasons. - Is October a good time to visit Boston?
Yes, October is one of the most popular months due to cool weather and fall foliage. - What is Boston weather like in spring?
Spring is cool and rainy at first, becoming warmer and sunnier by May. - Are winters in Boston harsh for travelers?
Winters can be challenging due to snowstorms and cold, but prices are lower and crowds are smaller. - Does Boston experience hurricanes?
Hurricanes are rare, but remnants of tropical storms can bring heavy rain in late summer or early fall. - What is the best time to visit Boston on a budget?
January through March (excluding holidays) typically offers lower hotel and flight prices. - Is Boston windy?
Coastal winds are common, especially in winter and early spring. - Does Boston have heatwaves?
Occasionally, Boston experiences short heatwaves during summer, usually lasting a few days. - What is the weather like in Boston in September?
September is warm, less humid, and ideal for sightseeing and outdoor activities. - Can I visit Boston in December?
Yes, December is festive with holiday decorations, though cold and sometimes snowy. - Do I need an umbrella in Boston?
Yes, carrying an umbrella is a good idea year-round, especially in spring. - Is Boston weather suitable for walking tours?
Late spring and early fall are the best seasons for walking tours due to mild temperatures.
What to Pack for Boston Weather
- Winter: Heavy coat, gloves, scarf, boots
- Spring: Layers, umbrella, light jacket
- Summer: Light clothing, sunscreen, hat
- Autumn: Sweaters, jackets, comfortable shoes
Final Thoughts
Boston’s weather changes dramatically throughout the year, offering travelers a unique experience in every season. Whether you want to walk the Freedom Trail under summer sunshine or enjoy snowy winter streets, knowing Boston’s monthly weather will help you plan a comfortable and memorable trip.