Boston, Massachusetts, United States climate

Average temperatures, precipitation and all-time records for Boston, Massachusetts, United States, with every day graded against ~46 years of local climate history (1980–2026). Its warmest month is July, averaging a high of 80°F, and its coldest is January, with an average low of 24°F.

Boston is the capital and most populous city of the U.S. state of Massachusetts. It serves as a cultural and financial center of New England, a region of the Northeastern United States. via Wikipedia

How today compares

Latest recorded day: 2026-07-24. Each reading placed on Boston, Massachusetts, United States's own ±7-day seasonal distribution.

High 81°F Normal · 57th pct

Low 58°F Very Low · 1st pct

Feels-like 85°F Normal · 54th pct

Humidity 11.6 g/m³ Very Low · 9th pct

Wind 13 mph High · 82nd pct

Gust 16 mph Low · 13th pct

Precip 0.00 in Dry

Open Boston in the live weather grader →

Notable weather in Boston

The Blizzard of 1978 paralyzed Boston for a week, dropping about 27 inches of snow, stranding thousands of motorists, and flooding coastal neighborhoods. Read more →

Boston average temperatures by month

Typical daily high and low, and average precipitation, for each month in Boston, Massachusetts, United States, based on 1980–2026 records. The wettest month is January (0.10 in on an average day).

Month	Avg high	Avg low	Avg precip
January	36°F	24°F	0.10 in
February	39°F	25°F	0.10 in
March	45°F	32°F	0.10 in
April	55°F	41°F	0.10 in
May	64°F	50°F	0.10 in
June	74°F	59°F	0.10 in
July	80°F	66°F	0.10 in
August	78°F	65°F	0.10 in
September	72°F	59°F	0.10 in
October	62°F	49°F	0.10 in
November	51°F	38°F	0.10 in
December	41°F	29°F	0.10 in

Jan 8°–48°

Feb 13°–50°

Mar 21°–56°

Apr 34°–65°

May 43°–74°

Jun 53°–84°

Jul 61°–88°

Aug 59°–86°

Sep 51°–80°

Oct 40°–70°

Nov 29°–62°

Dec 18°–53°

Each bar spans the 10th-percentile daily low to the 90th-percentile daily high (the range most days fall within), coloured cold → hot on a shared -10°F to 115°F scale, so the whole year's rhythm reads at a glance.

Thinking of visiting Boston?

Trips live and die by the weather. See how Boston's comfort stacks up against where you live. Boston is pre-loaded, just add your city.

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Record extremes

Hottest day on record: 98°F on 2011-07-22
Coldest day on record: -9°F on 2016-02-14

All Boston weather records →

Percentiles compare each day to Boston, Massachusetts, United States's own history, so grades are relative to this location: a “Near Record” day here isn't the same temperature as elsewhere. How the grades work →