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 83°F, and its coldest is January, with an average low of 22°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: 2026-10-12. Each reading placed on Boston, Massachusetts, United States's own ±7-day seasonal distribution.

High 68°F Above Normal · 74th pct

Low 50°F Normal · 59th pct

Feels-like 46°F Normal · 59th pct

Humidity 11.1 g/m³ High · 81st pct

Wind 10 mph Normal · 47th pct

Gust* 22 mph Normal · 41st pct

Precip 0.10 in Heavy · 66th pct

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	22°F	0.10 in
February	39°F	24°F	0.10 in
March	46°F	31°F	0.10 in
April	58°F	41°F	0.10 in
May	67°F	50°F	0.10 in
June	77°F	59°F	0.10 in
July	83°F	66°F	0.10 in
August	81°F	65°F	0.10 in
September	74°F	58°F	0.10 in
October	63°F	47°F	0.10 in
November	51°F	36°F	0.10 in
December	40°F	27°F	0.10 in

Jan 5°–49°

Feb 11°–51°

Mar 19°–59°

Apr 32°–70°

May 42°–79°

Jun 52°–88°

Jul 59°–92°

Aug 58°–89°

Sep 48°–83°

Oct 37°–72°

Nov 27°–63°

Dec 15°–54°

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: 103°F on 2011-07-22
Coldest day on record: -13°F on 1984-01-22

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 →