Climateby Month

Brockton, MA climate by month

NOAA 1991-2020 normals · 113 ft elevation

Brockton has warm and often humid summers and cold and snowy winters. Highs peak at 84°F in July and fall to 39°F in January. Wet days are spread through the year, from about 9 to 13 a month. Normal snowfall is about 50 in a year. By our comfort score the best month is May.

Warmest month
84°F
July normal high
Coldest month
21°F
January normal low
Wet days a year
133
50.2 in of precipitation
Snow a year
49.5 in
normal snowfall

How warm is Brockton?

Normal highs range from 39°F in January to 84°F in July.

20°40°60°80°100° January: normal high 39°F (4°C), low 21°F (-6°C) 39° 21° February: normal high 41°F (5°C), low 22°F (-6°C) March: normal high 48°F (9°C), low 29°F (-2°C) April: normal high 59°F (15°C), low 38°F (3°C) May: normal high 70°F (21°C), low 47°F (8°C) June: normal high 78°F (26°C), low 57°F (14°C) July: normal high 84°F (29°C), low 63°F (17°C) 84° 63° August: normal high 83°F (28°C), low 62°F (17°C) September: normal high 75°F (24°C), low 54°F (12°C) October: normal high 64°F (18°C), low 43°F (6°C) November: normal high 54°F (12°C), low 34°F (1°C) December: normal high 44°F (7°C), low 26°F (-3°C) JFMAMJJASOND

Bars run from the normal low to the normal high for each month.

How rainy is Brockton?

May has the most wet days (about 13); the year brings about 50 in of precipitation.

January: 11 wet days February: 11 wet days March: 12 wet days April: 12 wet days May: 13 wet days 13 June: 11 wet days July: 10 wet days August: 9 wet days 9 September: 9 wet days October: 11 wet days November: 11 wet days December: 12 wet days JFMAMJJASOND

Wet day: at least 0.01 in of rain or melted snow, counted from daily records 1991-2020.

How much does it snow?

Normal snowfall is 49.5 in a year, most of it in January.

January: 14.3 in of snow 14.3 February: 12.6 in of snow March: 10.1 in of snow April: 1.9 in of snow May: 0.0 in of snow 0.0 June: 0.0 in of snow July: 0.0 in of snow August: 0.0 in of snow September: 0.0 in of snow October: 0.2 in of snow November: 1.2 in of snow December: 9.2 in of snow JFMAMJJASOND

How humid is Brockton?

Muggy days peak in July, at about 10 days.

January: 0 muggy days 0 February: 0 muggy days March: 0 muggy days April: 0 muggy days May: 0 muggy days June: 3 muggy days July: 10 muggy days 10 August: 9 muggy days September: 4 muggy days October: 0 muggy days November: 0 muggy days December: 0 muggy days JFMAMJJASOND

Muggy day: daily mean dew point of 65°F or higher, from hourly observations 1991-2020 at Gen E L Logan International Airport, 19 mi N of the city center (the nearest airport with complete hourly records).

How much daylight?

Daylight ranges from about 9.2 hours in December to 15.2 hours in June.

January: 9.5 hours of daylight February: 10.6 hours of daylight March: 11.9 hours of daylight April: 13.4 hours of daylight May: 14.6 hours of daylight June: 15.2 hours of daylight 15.2 July: 14.9 hours of daylight August: 13.8 hours of daylight September: 12.5 hours of daylight October: 11.1 hours of daylight November: 9.8 hours of daylight December: 9.2 hours of daylight 9.2 JFMAMJJASOND
See all numbers
Monthly climate normals and day counts for Brockton, 1991-2020
MonthHighLowPrecip.Wet daysSnowMuggy daysDaylight
January 39°F21°F 4.0 in11 14.3 in 0 9.5 h
February 41°F22°F 3.6 in11 12.6 in 0 10.6 h
March 48°F29°F 5.2 in12 10.1 in 0 11.9 h
April 59°F38°F 4.5 in12 1.9 in 0 13.4 h
May 70°F47°F 3.4 in13 0.0 in 0 14.6 h
June 78°F57°F 4.1 in11 0.0 in 3 15.2 h
July 84°F63°F 3.2 in10 0.0 in 10 14.9 h
August 83°F62°F 3.6 in9 0.0 in 9 13.8 h
September 75°F54°F 4.1 in9 0.0 in 4 12.5 h
October 64°F43°F 5.0 in11 0.2 in 0 11.1 h
November 54°F34°F 4.4 in11 1.2 in 0 9.8 h
December 44°F26°F 5.1 in12 9.2 in 0 9.2 h

High and low: NOAA 1991-2020 normal daily high and low. Wet days: at least 0.01 in of rain or melted snow. Muggy days: daily mean dew point 65°F or higher.

Best months to visit Brockton

By our comfort score, the best month is May.

Comfort score by month (0-100) and its parts, in days per month
MonthScoreComfortableNotable rainHot or cold
Jan 290719
Feb 330715
Mar 44277
Apr 59781
May 731671
Jun 691273
Jul 56466
Aug 58665
Sep 681671
Oct 611370
Nov 44472
Dec 321812

Score = 40 × share of comfortable days + 25 × share of days without notable rain + 20 × share of days neither hot (90°F+) nor cold (high 40°F or below) + 15 × daylight. How the score works.

Frost dates in Brockton

The last spring frost typically comes around Apr 22, and the first fall frost around Oct 19, leaving 178 frost-free days in a typical year.

Frost and freeze dates for Brockton
Typical date1 year in 10
Last spring frost (32°F)Apr 22after May 5
First fall frost (32°F)Oct 19before Oct 5
Last hard freeze (28°F)Apr 6after Apr 20
First hard freeze (28°F)Oct 31before Oct 16
Frost-free season178 daysunder 158 days

"Typical" is the date with a 50% chance of a later spring frost (or earlier fall frost). Planting after the "1 year in 10" spring date gives a 90% chance of no further frost. The Old Farmer's Almanac publishes 30% dates, which fall between our typical and 1-in-10 dates.

Station: Brockton (USC00190860), NOAA 1991-2020 freeze probabilities. Frost dates for every city in Massachusetts.

Hottest and coldest readings, 1991-2020

The highest reading was 102°F (July 28, 2020, and 1 other day); the lowest was -11°F (February 14, 2016, and 1 other day).

From the temperature station's daily records with NOAA quality flags removed. Not an all-time record.

Near Brockton

Similar climates elsewhere

Where the numbers come from

  • Temperature, rain, snow depth and frost dates: Brockton (USC00190860), 2.5 mi SSE of the city center, 75 ft . NOAA normals and daily records, 1991-2020.
  • Snowfall: Norton W (USC00195984), 9.9 mi SW of the city center, 95 ft . NOAA normals and daily records, 1991-2020.
  • Humidity and wind by hour: Plymouth Muni Airport (USW00054769), 19 mi SE of the city center, 149 ft . NOAA normals and daily records, 1991-2020.
  • Cloud cover: Boston Logan Intl Airport (USW00014739), 19 mi N of the city center, 12 ft (101 ft lower than the city). NOAA normals and daily records, 1991-2020.
  • Daily humidity and wind: Gen E L Logan International Airport (725090-14739), 19 mi N of the city center, 11 ft (102 ft lower than the city). Hourly observations, 1991-2020.

Distances from the city center (USGS). Methodology · Report an error