2026 Climate Averages

Boston: Weather Guide & Climate

Complete month-by-month weather guide: Boston. Best time to visit: May, June, September, October. Plan your trip with detailed climate data.

☀️ Climate Overview

Boston has a Cool climate with average yearly highs of 15°C, lows of 8°C, and approximately 10 rainy days per month.

The best time to visit Boston is during May, June, September, October, when weather is pleasant and ideal for outdoor activities

Drier season: Jan–Nov Wetter season: Mar–Dec

Now

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Feels like --
Wind --
Humidity --
UV Index --
Local time

Air Quality

Hottest

27°C July
Avg Low 20°C
Rain 11 days

Coldest

-3°C January
Avg High 4°C
Rain 10 days

Driest Month

8 rainy days February
Avg High 5°C
Avg Low -3°C

Windiest Month

24 km/h

March (gusts 47)

Sea Temp Range

20°C

Warmest water: August (20°C)

Forecast for your trip dates

Up to 14 days ahead

Weather by Season

Spring

Mar–May

High 14°C
Low 6°C
Rain 11 days
Crowds
Moderate
Travel Costs Shoulder Rates

Summer

Jun–Aug

High 26°C
Low 18°C
Rain 10 days
Crowds
Busy
Travel Costs Shoulder Rates

Autumn

Sep–Nov

High 17°C
Low 10°C
Rain 8 days
Crowds
Busy
Travel Costs Peak Rates

Winter

Dec–Feb

High 5°C
Low -2°C
Rain 10 days
Crowds
Quiet
Travel Costs Value Rates

Month-by-Month Weather Table

⚖️Find Your Ideal Month

Adjust the sliders to weight what matters most to you.

5
3
3
Your Best MonthAugScore: 7.4

Where to Stay

See hotels, apartments & rentals around Boston – live prices from Booking.com, Expedia, Vrbo and more

Boston

Freedom Trail history, Fenway Park, Ivy-league vibes across the Charles, seafood, and harbor charm.

View Full Destination Guide

Ready to Plan Your Boston Trip?

Get strategic travel tips, seasonal insights, and expert recommendations.

Frequently Asked Questions

What type of climate does Boston have?
Boston has a cool climate with average yearly temperatures of 15°C and 8°C.
When is the best time to visit Boston?
The best time to visit Boston is during May, June, September, October, when temperatures average around 19°C and conditions are ideal for sightseeing.
What are the hottest and coldest months in Boston?
The hottest month in Boston is July with average highs of 27°C, while the coldest is January with average lows of -3°C.
When is the rainy season in Boston?
Boston sees the most rain in March (12 rainy days), while February is the driest month (8 rainy days).
Does it get cold at night in Boston?
Night temperatures vary throughout the year. The coldest nights are in January (-3°C), while July has the warmest evenings (20°C). Pack layers for cooler months.

Weather Data: Based on 2020–2025 historical climate data from Open-Meteo

Last Updated: February 2026