Brockton weather in May

In May, Brockton sees average daytime highs of 66°F and overnight lows near 50°F, with 3.0 in of rain across 10.7 wet days and about 14.4 hours of daylight. It is the 5th-warmest and 11th-wettest month of the year here.

Highs climb over the month, from about 62°F in the first days to 70°F by the end. The sky is clear or mostly clear about 23% of the time in May, and the air most often feels dry.

Daylight stretches from about 13 h 48 min at the start of May to 14 h 48 min by month's end. Set against the rest of the year, May is Brockton's 11th-clearest and 8th-windiest month. For the whole year in context, see Brockton's year-round climate.

Daytime high
66°
5th warmest
Overnight low
50°
8th coldest
Rainfall
3.0 in
10.7 wet days
Daylight
14 h 24 min
4:29 AM – 6:52 PM
Cloud cover
65%
11th clearest
Wind
7 mph
8th windiest
Solar energy
5.6 kWh/m²
Travel score
5.8
out of 10

Brockton is city in Massachusetts, United States.

Density
1,710/km²
people per km²
Founded
1700

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 62°F in the first days to 70°F by the end.

A typical May day in Brockton reaches about 66°F in the afternoon and slips back to 50°F overnight — a 16°F spread between the day's warmth and the night's chill. On most days the high lands between 54°F and 78°F. Set against its neighbours, May runs about 10°F warmer than April and about 10°F cooler than June.

40°60°80°151015202531
Avg high (°F)Avg low (°F)
16146
26246
36246
46246
56347
66347
76347
86447
96448
106448
116448
126548
136549
146549
156549
166649
176650
186750
196750
206751
216851
226851
236852
246952
256952
266953
277053
287053
297054
307154
317154

How May really feels in Brockton

Once humidity and wind are folded in, May averages 0 days that feel above 90°F and 0 that feel at or below 32°F — the comfort signal a plain temperature reading hides.

Days feeling ≥ 90°F
0
heat index over the day's high
Days feeling ≤ 32°F
0
wind chill below the day's low

May sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Brockton weather by month

How May compares with the rest of the year at a glance. May is the 5th-warmest and 11th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan37° / 24°3.69.75.49.30.0
Feb39° / 25°3.29.14.910.30.0
Mar46° / 31°4.411.14.611.71.2
Apr56° / 41°3.711.20.913.13.7
May66° / 50°3.010.7014.45.8
Jun76° / 59°3.49.70156.7
Jul82° / 65°3.09.9014.86.4
Aug80° / 64°3.59.6013.76.7
Sep73° / 57°3.58.1012.37.0
Oct62° / 47°4.19.50.110.85.4
Nov51° / 37°3.68.90.79.62.7
Dec42° / 29°4.310.63.890.4

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 23% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 18% of May, with mostly cloudy or overcast conditions the remaining 59%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14060
24060
33961
43961
53961
64060
74159
84060
94060
104060
114060
124060
134060
144159
154159
164159
174159
184159
194258
204258
214258
224258
234258
244258
254258
264258
274357
284258
294258
304258
314258

Chance of precipitation in May

Any precipitation

Brockton gets around 3.0 in of rain over 10.7 wet days in May. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 35% and peaks near 39% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%50%151015202531
Rain chance (%)
139
238
337
437
536
636
736
836
936
1036
1136
1236
1336
1436
1536
1636
1736
1835
1935
2035
2134
2234
2333
2433
2532
2632
2731
2831
2931
3031
3131

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

Most of May feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, May lands in the dry band about 82% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
194510
294510
393520
492620
592620
692620
792620
891720
990730
1089830
1189830
1289830
1388930
1488930
1588930
16851041
17851041
18841141
19821251
20811261
21801361
22771472
23751582
24731692
25721792
267017103
276818113
286619123
296519133
306320134
316220144

Wind in May

Winds average 7 mph in May.

Across May, daily wind ranges from about 7 mph on the calmest days to 8 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (mph)Feels
18light breeze
28light breeze
38light breeze
48light breeze
58light breeze
68light breeze
78light breeze
88light breeze
98light breeze
108light breeze
118light breeze
128light breeze
138light breeze
148light breeze
157light breeze
167light breeze
177light breeze
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm
317calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 13 h 48 min at the start of May to 14 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 60 minutes over May. Sunrise moves from 4:47 AM to 4:17 AM, and sunset from 6:35 PM to 7:06 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.84:476:35
213.84:466:36
313.94:456:38
413.94:436:39
514.04:426:40
614.04:416:41
714.04:396:42
814.14:386:43
914.14:376:44
1014.24:366:45
1114.24:346:46
1214.24:336:47
1314.34:326:48
1414.34:316:50
1514.34:306:51
1614.44:296:52
1714.44:286:53
1814.44:276:54
1914.54:266:55
2014.54:256:56
2114.54:246:57
2214.64:236:58
2314.64:236:59
2414.64:227:00
2514.74:217:00
2614.74:207:01
2714.74:207:02
2814.74:197:03
2914.84:187:04
3014.84:187:05
3114.84:177:06

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.6 kWh/m².

For context, solar energy here swings from a low near 1.63 kWh/m² to a high of 6.02 kWh/m² in July across the year — May's 5.6 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.3Bright
25.3Bright
35.3Bright
45.3Bright
55.3Bright
65.3Bright
75.4Bright
85.4Bright
95.4Bright
105.4Bright
115.5Bright
125.5Bright
135.5Bright
145.5Bright
155.6Bright
165.6Bright
175.6Bright
185.6Bright
195.7Bright
205.7Bright
215.7Bright
225.8Bright
235.8Bright
245.8Bright
255.8Bright
265.8Bright
275.8Bright
285.9Bright
295.9Bright
305.9Bright
315.9Bright
Planning a trip in May

Hazard calendar for Brockton

In seasonPeak

None of Brockton's seasonal hazards are active in May. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Brockton sits in the Atlantic hurricane belt; the season peaks August–October.

Atlantic hurricane
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is May a good time to visit Brockton?

Our two travel scores rate May for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

5.8
Sightseeing
5th-best month of the year
2.5
Beach & pool
5th-best month of the year

May is a reasonable time to visit Brockton for sightseeing.

What to pack for Brockton in May

From May's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In May, Brockton sees daytime highs around 66°F and nights near 50°F. Worth packing: rain gear and sun protection. About 11 days see rain.

rain gearsun protection

Sea temperature near Brockton in May

The nearest coast averages about 50°F in May — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 21 mi away) is warmest in August at about 66°F and coldest in February near 38°F.

The water stays below 68°F all year — cool enough that most swimmers want a wetsuit.

40°50°60°70°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshing
Sea temperature (°F)Comfort
Jan41Bracing
Feb38Bracing
Mar38Bracing
Apr42Bracing
May50Bracing
Jun58Bracing
Jul65Cool
Aug66Cool
Sep63Cool
Oct57Bracing
Nov51Bracing
Dec46Bracing

UV index in Brockton in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Brockton peaks around July 10 at about 8 (very high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near December 23 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighHighModerateLowJul 10UV 8Dec 23UV 1
UV index (midday)Level
Jan1Low
Feb3Moderate
Mar4Moderate
Apr5High
May7Very high
Jun7Very high
Jul8Very high
Aug5Moderate
Sep6High
Oct3Moderate
Nov2Moderate
Dec1Low

Air quality in Brockton in May

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where May falls, not just the annual average.

Air quality in Brockton is worst in July — around 16 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (November, 8 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1516 µg/m³Nov 189 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb13Moderate
Mar14Moderate
Apr14Moderate
May15Moderate
Jun15Moderate
Jul16Moderate
Aug14Moderate
Sep12Good
Oct10Good
Nov8Good
Dec10Good
Location & terrain

Where is Brockton?

Brockton sits at 42.1°N, 71.0°W, 115 ft above sea level, in United States. The nearest listed city is Abington, 3.7 mi away.

Topography around Brockton

How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Brockton.

Within 2 miles, the terrain around Brockton has only modest variations in elevation — a maximum elevation change of 190 ft around an average of 144 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 509 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 1,598 ft.

The land around Brockton is covered by trees (51%) and artificial surfaces (37%) within 2 miles, trees (79%) within 10 miles, and trees (54%) and water (36%) within 50 miles.

2 miles
190 ft
10 miles
509 ft
50 miles
1,598 ft
treesgrasslandartificial surfaceswaterwetland
May weather nearby: Abington 3.7 mi · Stoughton 5.0 mi · Randolph 5.6 mi · Rockland 6.2 mi · Easton 6.8 mi · Canton 8.1 mi · Braintree 8.1 mi · Weymouth 11 mi

United States travel facts

Power plugs
Type A / B
120 V · 60 Hz
Prices
≈ 100% of US
price level, 2025
GDP per capita
$90,027
2025
Happiness
6.8 / 10
World Happiness, 2025
Safe drinking water
98%
of population, 2024
Homicide rate
5.8
per 100k, 2023
Road deaths
12.7
per 100k/yr, 2019
Income group
High
World Bank
Religion
Protestant 47%unaffiliated 23%Roman Catholic 21%Jewish 2%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Brockton (42.0834°, -71.0184°, elevation 115 ft), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).