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Climate · United States

Boston

Warm and damp from June to September; chilly and damp from December to March.

Typical weather, averaged over 30 years42.4°N0 m above the sea
  1. Jan40°4°22°-6°Rain on about two days a week.
  2. Feb40°4°21°-6°Rain on about two days a week.
  3. Mar48°9°28°-2°Rain on about two days a week.
  4. Apr59°15°39°4°Rain on about three days a week.
  5. May69°21°49°9°Rain on about three days a week.
  6. Jun79°26°59°15°Rain on about three days a week.
  7. Jul85°29°66°19°Rain on about two days a week.
  8. Aug84°29°65°18°Rain on about two days a week.
  9. Sep77°25°59°15°Rain on about two days a week.
  10. Oct67°19°50°10°Rain on about two days a week.
  11. Nov55°13°39°4°Rain on about two days a week.
  12. Dec45°7°29°-2°Rain on about two days a week.
Each month: its typical high and low, and dots for wet days a week. Tap a month to open it.The best months

The warm season runs from June to September, with highs near 81°F and nights near 63°F. From December to March, highs are nearer 43°F. Rain or snow falls on about two days a week, spread through the year. Daylight runs from about 9 hours in December to 15 hours in June.The warm season runs from June to September, with highs near 27°C and nights near 17°C. From December to March, highs are nearer 6°C. Rain or snow falls on about two days a week, spread through the year. Daylight runs from about 9 hours in December to 15 hours in June.

Where Boston sits

America/New York
this place
typical high in Januarytypical high in Februarytypical high in Marchtypical high in Apriltypical high in Maytypical high in Junetypical high in Julytypical high in Augusttypical high in Septembertypical high in Octobertypical high in Novembertypical high in December 40°F4°C95°F35°C
Latitude
42.4°Nnorthern hemisphere
Above the sea
0 mlow-lying
Sunrise, mid-JanuarySunrise, mid-FebruarySunrise, mid-MarchSunrise, mid-AprilSunrise, mid-MaySunrise, mid-JuneSunrise, mid-JulySunrise, mid-AugustSunrise, mid-SeptemberSunrise, mid-OctoberSunrise, mid-NovemberSunrise, mid-December
7:11 AM6:42 AM6:58 AM6:05 AM5:23 AM5:06 AM5:20 AM5:51 AM6:23 AM6:55 AM6:34 AM7:06 AMsets 4:35 PMsets 5:15 PMsets 6:49 PMsets 7:24 PMsets 7:57 PMsets 8:22 PMsets 8:20 PMsets 7:48 PMsets 6:56 PMsets 6:04 PMsets 4:24 PMsets 4:12 PM
Nearest of ours
Amherst120 km west

The land around Boston, shaded by its typical high in January, the planning map's own layer.The land around Boston, shaded by its typical high in February, the planning map's own layer.The land around Boston, shaded by its typical high in March, the planning map's own layer.The land around Boston, shaded by its typical high in April, the planning map's own layer.The land around Boston, shaded by its typical high in May, the planning map's own layer.The land around Boston, shaded by its typical high in June, the planning map's own layer.The land around Boston, shaded by its typical high in July, the planning map's own layer.The land around Boston, shaded by its typical high in August, the planning map's own layer.The land around Boston, shaded by its typical high in September, the planning map's own layer.The land around Boston, shaded by its typical high in October, the planning map's own layer.The land around Boston, shaded by its typical high in November, the planning map's own layer.The land around Boston, shaded by its typical high in December, the planning map's own layer. Hover the map for the figure at that spot; tap it on a phone. Clock times are local, for the 15th.

Through the year

week by week

Temperature

Highs from 40°F in January and February to 85°F in July.Highs from 4°C in January and February to 29°C in July.

Chance of a wet day

Wettest in May (38% of days), driest in September (27%).

Cloud cover

Clearest in September (41% cover), cloudiest in May (58%).

Daylight

From 9h 08m in December to 15h 14m in June.

Week by week, lightly smoothed. Shading marks the seasons; the olive line, the best months. Hover or tap a week for its figures.

Month by month

°F°C
Boston, month by month: the typical high and low, wet days a week, cloud cover and daylight.
MonthTypical low to highWet days a weekCloudDaylight
JanuaryCool season
22°-6°40°4°
2 days57%9h 28m
FebruaryCool season
21°-6°40°4°
2 days56%10h 29m
MarchCool season
28°-2°48°9°
2 days57%11h 52m
April
39°4°59°15°
3 days57%13h 20m
May
49°9°69°21°
3 days58%14h 35m
JuneWarm seasonAt its best
59°15°79°26°
3 days53%15h 14m
JulyWarm season
66°19°85°29°
2 days48%14h 55m
AugustWarm season
65°18°84°29°
2 days44%13h 49m
SeptemberWarm seasonAt its best
59°15°77°25°
2 days41%12h 24m
October
50°10°67°19°
2 days44%10h 56m
November
39°4°55°13°
2 days50%9h 43m
DecemberCool season
29°-2°45°7°
2 days56%9h 08m

When is the best time to visit Boston?

The best months are June, or September: highs near 78°F, nights near 59°F, and rain on about two days a week.The best months are June, or September: highs near 26°C, nights near 15°C, and rain on about two days a week.

How we judge it: every month is scored on how close its typical high comes to the range from 70°F to 80°F, how mild its nights are, and how rarely it rains. The best months are the run of months that scores best.How we judge it: every month is scored on how close its typical high comes to the range from 21°C to 27°C, how mild its nights are, and how rarely it rains. The best months are the run of months that scores best.

Questions

What is the warmest month in Boston?

July, with highs near 85°F and lows near 66°F. The coolest are January and February, with highs near 40°F.July, with highs near 29°C and lows near 19°C. The coolest are January and February, with highs near 4°C.

When does it rain most in Boston?

May, with rain on about three days a week. September is the driest, with rain on about two days a week.

How long are the days in Boston?

From about 9 hours in December to 15 hours in June.

When are the skies clearest in Boston?

September, when cloud covers about 41% of the sky on average. May is the cloudiest, at about 58%.

Places with a year like Boston's

by their highs, lows and wet days

Their highs, lows, wet days and cloud run closest to Boston's through the year, one place a country. “Six months apart”: their winter is Boston's summer.

Elsewhere in United States

All of United States

Where to stay

1 in our collection
Open the planning map

Typical weather, averaged over 30 years (1995–2024), from the 11 km grid square nearest Boston. Temperatures are adjusted against 66 weather stations: daytime highs read about 3.1°F cold in the source data and are raised to match.Temperatures are adjusted against 66 weather stations: daytime highs read about 1.7°C cold in the source data and are raised to match. Daylight is calculated from latitude. Charts are lightly smoothed week to week; the figures in the table are not. Source: Copernicus ERA5-Land reanalysis; cloud cover from NASA's MERRA-2 reanalysis, on a coarser grid of about 50 km. Contains modified Copernicus Climate Change Service information 2026; neither the European Commission nor ECMWF is responsible for any use of it. These are averages, not a forecast.

Daylight is calculated from latitude. Charts are lightly smoothed week to week; the figures in the table are not.

Source: Copernicus ERA5-Land reanalysis; cloud cover from NASA's MERRA-2 reanalysis, on a coarser grid of about 50 km. Contains modified Copernicus Climate Change Service information 2026; neither the European Commission nor ECMWF is responsible for any use of it. These are averages, not a forecast.