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South Boston weather

Massachusetts · 571,281 inhabitants · Thursday, October 29 · updated 15:19

Air: Moderate

18°

Clear sky

Feels like 18°C

Wind

19 km/h

Gusts

30 km/h

Humidity

53 %

Pressure

1020 hPa

Clouds

0 %

Storm

Rise 07:14 Set 17:41 Day 10 h 27 min UV 5 · Moderate

Morning, afternoon, evening

Trend

Afternoon

Clear sky

18°

Feels like 18°

Wind ↑ SW 19 km/h

Gusts 34 km/h

Humidity 53 %

Evening

Clear sky

14°13°

Feels like 14°

Wind ↑ SW 21 km/h

Gusts 50 km/h

Humidity 78 %

17:00

18°

SW 18

South Boston forecast in charts · next 7 days

The week ahead: highs and lows

▲ This week runs +4.4° warmer than usual

Highs Lows Usual for the season (1991–2020 average)

Hourly detail

Temperature (°C) Rain (mm) Wind (km/h)

South Boston climate: what a normal year looks like

Nights typically freeze from December to March, the coldest averaging −5 °C in January.

The hottest stretch is July, when afternoons average 26 °C; the coldest is January, when nights average −5 °C. Between those two months the average temperature changes by 23 °C.

From 15 h 16 min of daylight in late June to 9 h 04 min in late December.

There is no real dry season: monthly rainfall stays between 77 mm and 118 mm on average.

Forecast highs for the coming week average 18 °C, 2 °C warmer than a normal October (16 °C).

30-year averages (1991–2020)
Month	Typical high	Typical low	Rainfall
Jan	3 °C	−5 °C	96 mm
Feb	3 °C	−4 °C	85 mm
Mar	6 °C	−1 °C	117 mm
Apr	12 °C	4 °C	103 mm
May	18 °C	10 °C	85 mm
Jun	22 °C	15 °C	91 mm
Jul	26 °C	19 °C	77 mm
Aug	26 °C	18 °C	89 mm
Sep	22 °C	15 °C	90 mm
Oct	16 °C	9 °C	109 mm
Nov	11 °C	4 °C	96 mm
Dec	5 °C	−1 °C	118 mm
Whole year	14 °C	7 °C	1,160 mm

Source: our own processing of the ERA5 reanalysis (Copernicus/ECMWF) for 42.33° N, 71.05° W, 1991–2020. ERA5 averages over a 0.25° grid (about 25 km): hills, a coastline or the heat of the city itself can shift local values by a degree or two.

Air you breathe in South Boston: pollution and pollen

3/6

Moderate

European Air Quality Index (EAQI), from Copernicus CAMS

PM2.524µg/m³

PM1025µg/m³

Copernicus CAMS model, updated several times a day.

Rain radar around South Boston

Rain observed over the last two hours by official weather radars around South Boston, followed by the radar forecast for the next hour where the weather service provides one.

Full-screen rain radar and next-hour rain on RainAtlas

Rain radar Last two hours, then forecast where available · drag the timeline

Moon over South Boston

Waning gibbous

87 % illuminated · 18.3 days

Rise 15:53 Set 07:34

Fri 30/10 79%

Sat 31/10 69%

Sun 1/11 59%

Mon 2/11 49% Last quarter

Tue 3/11 38%

Wed 4/11 28%

Thu 5/11 19%

Fri 6/11 12%

Sat 7/11 6%

Sun 8/11 2%

Mon 9/11 0%

Tue 10/11 1% New moon

Moonrise and moonset in local time (America/New_York); phase and lit fraction from a synodic calculation.

Look up a past day in South Boston

Curious about the weather in South Boston on a given day? Choose a date: we read it from the ERA5 reanalysis (ECMWF / Copernicus C3S), which runs until about a week ago.

South Boston weather at a glance

This page gathers everything about the weather in South Boston, Massachusetts: conditions now, the forecast for each part of the day and the trend for the coming week. At the moment the sky is “clear sky”, it is 18 °C (feels like 18 °C) and the wind blows at 19 km/h.

Expected range today: 8 °C to 18 °C and a dry sky. The forecast comes from the AtmoAtlas engine, which combines ECMWF-AIFS, NOAA GFS and DWD ICON, adjusts cloud cover with METAR reports and uses convective energy (CAPE) to flag storms.

Other big cities nearby

Boston 3 km 18°

South Boston weather data for developers

Use the South Boston forecast in your own website or app: one JSON call returns weather, air quality, tides and sun and moon times. The free key needs no card.

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Where does this forecast come from? Our engine, checked every day against 1125 weather stations