South Boston, Massachusetts, United States Climate

Weather: 2.92°C/37.26°F, Wind SW at 7.72 km/h, 44% Humidity, 0% Chance of rain

South Boston Climate Summary

Located at an elevation of None meters (0 feet) above sea level, South Boston has a Humid continental, no dry season, hot summer climate (Classification: Dfa). The district’s yearly temperature is 12.79ºC (55.02ºF) and it is 0.15% higher than United States’s averages. South Boston typically receives about 36.1 millimeters (1.42 inches) of precipitation and has 38.27 rainy days (10.48% of the time) annually.

CountryUnited States
CityMassachusetts
Longitude-71.0475773
Latitude42.3381437
Attitude/ElevationNonem (0ft)
Local timeSaturday 21:02
Annual high temperature15.41ºC (59.74ºF)
Annual low temperature8.3ºC (46.94ºF)
Average annual precip.36.1mm (1.42in)
Warmest monthJuly (30.42ºC / 86.76ºF)
Coldest MonthJanuary (-3.94ºC / 24.91ºF)
Wettest MonthDecember (53.39mm / 2.1in)
Driest MonthSeptember (19.35mm / 0.76in)
Number of days with rainfall (≥ 1.0 mm)38.27 days (10.48%)
Days with no rain326.73 days (89.52%)
Humidity65.34%

Climate South Boston: Weather By Month

MonthJanFebMarAprMayJunJulAugSepNovOctDecYear
Record high °C (°F)18.0(64.4)20.0(68.0)19.0(66.2)23.0(73.4)33.0(91.4)35.0(95.0)40.0(104.0)38.0(100.4)36.0(96.8)29.0(84.2)22.0(71.6)17.0(62.6)40.0(104.0)
Average high °C (°F)2.28(36.1)4.54(40.17)6.7(44.06)12.09(53.76)19.77(67.59)25.46(77.83)30.42(86.76)28.78(83.8)24.07(75.33)16.69(62.04)9.63(49.33)4.54(40.17)15.41(59.74)
Daily mean °C (°F)-0.01(31.98)2.16(35.89)4.2(39.56)9.49(49.08)16.77(62.19)22.56(72.61)27.34(81.21)25.91(78.64)21.14(70.05)14.2(57.56)7.23(45.01)2.47(36.45)12.79(55.02)
Average low °C (°F)-3.94(24.91)-1.79(28.78)0.19(32.34)4.91(40.84)11.16(52.09)16.98(62.56)21.71(71.08)20.97(69.75)16.78(62.2)10.19(50.34)3.46(38.23)-0.98(30.24)8.3(46.94)
Record low °C (°F)-20.0(-4.0)-12.0(10.4)-12.0(10.4)-2.0(28.4)3.0(37.4)10.0(50.0)17.0(62.6)12.0(53.6)7.0(44.6)-2.0(28.4)-10.0(14.0)-11.0(12.2)-20.0(-4.0)
Average precipitation mm (inches)37.89(1.49)32.88(1.29)45.07(1.77)45.45(1.79)28.27(1.11)24.75(0.97)31.78(1.25)26.08(1.03)19.35(0.76)42.65(1.68)45.63(1.8)53.39(2.1)36.1(1.42)
Average precipitation days (≥ 1.0 mm)2.553.453.184.04.02.913.643.092.273.093.362.733.19
Average relative humidity (%)67.2267.1167.8162.8663.1861.962.163.4364.767.5665.9270.2365.34
Mean monthly sunshine hours6.78.468.710.212.4913.2113.5412.4410.337.856.556.599.76

Climate Graph

The chart below shows the mean monthly temperature and precipitation of South Boston in recent years.

South Boston

South Boston Temperature by Month

July
27.34°C | 81.21°F
August
25.91°C | 78.64°F
June
22.56°C | 72.61°F
September
21.14°C | 70.05°F
May
16.77°C | 62.19°F
October
14.2°C | 57.56°F
April
9.49°C | 49.08°F
November
7.23°C | 45.01°F
March
4.2°C | 39.56°F
December
2.47°C | 36.45°F
February
2.16°C | 35.89°F
January
-0.01°C | 31.98°F

Historical Data

Summary
  • 2020
  • 2019
  • 2018
  • January
  • February
  • March
  • April
  • May
  • June
  • July
  • August
  • September
  • October
  • November
  • December
TemperatureMaxAverageMin
Max Temperature36.0°C (96.8°F)29.29°C (84.72°F)21.0°C (69.8°F)
Avg Temperature32.0°C (89.6°F)26.58°C (79.84°F)20.0°C (68.0°F)
Min Temperature27.0°C (80.6°F)22.32°C (72.18°F)18.0°C (64.4°F)
Dew PointMaxAverageMin
Dew Point21.0°C (69.8°F)17.58°C (63.64°F)13.0°C (55.4°F)
PrecipitationMaxAverageMinSum
Precipitation9.6mm | 0.38in1.52mm | 0.06in0.0mm | 0in47.2mm | 1.86in
Snowdepth0.0mm | 0in0.0mm | 0in0.0mm | 0in0.0mm | 0in
WindMaxAverageMin
Wind21.0kmh | 13.05mph12.0kmh | 7.46mph6.0kmh | 3.73mph
Gust Wind30.0kmh | 18.64mph16.1kmh | 10.0mph8.0kmh | 4.97mph
Sea Level PressureMaxAverageMin
Sea Level Pressure9.6mb1.52mb0.0mb
South Boston

Daily Observations

TimeTemperatureDew PointHumidityWind SpeedPressurePrecipitation
July° C | ° F° C | ° F%Kph | MphHg | MbTotal (mm/in)
2020-07-0122 | 71.618 | 64.4808 | 4.9729.85 | 10111.1 | 0.04
2020-07-0227 | 80.618 | 64.4666 | 3.7329.8 | 10090.2 | 0.01
2020-07-0320 | 68.017 | 62.67815 | 9.3229.85 | 10110.0 | 0.0
2020-07-0422 | 71.617 | 62.67812 | 7.4629.91 | 10130.1 | 0.0
2020-07-0527 | 80.618 | 64.4668 | 4.9729.91 | 10130.5 | 0.02
2020-07-0625 | 77.013 | 55.45012 | 7.4629.97 | 10150.2 | 0.01
2020-07-0723 | 73.416 | 60.86913 | 8.0830.09 | 10190.1 | 0.0
2020-07-0827 | 80.619 | 66.27115 | 9.3230.0 | 10160.7 | 0.03
2020-07-0928 | 82.420 | 68.07013 | 8.0830.0 | 10162.4 | 0.09
2020-07-1025 | 77.021 | 69.87912 | 7.4630.0 | 10167.0 | 0.28
2020-07-1129 | 84.221 | 69.87221 | 13.0529.8 | 10092.1 | 0.08
2020-07-1229 | 84.219 | 66.26018 | 11.1829.68 | 10050.0 | 0.0
2020-07-1327 | 80.617 | 62.65812 | 7.4629.77 | 10081.4 | 0.06
2020-07-1422 | 71.618 | 64.48012 | 7.4629.85 | 10119.6 | 0.38
2020-07-1521 | 69.816 | 60.87813 | 8.0830.09 | 10190.2 | 0.01
2020-07-1622 | 71.614 | 57.26710 | 6.2130.27 | 10250.0 | 0.0
2020-07-1722 | 71.617 | 62.67614 | 8.730.15 | 10210.8 | 0.03
2020-07-1829 | 84.218 | 64.4667 | 4.3530.0 | 10160.0 | 0.0
2020-07-1931 | 87.817 | 62.64812 | 7.4629.91 | 10130.0 | 0.0
2020-07-2031 | 87.818 | 64.45117 | 10.5629.83 | 10100.0 | 0.0
2020-07-2129 | 84.216 | 60.84810 | 6.2129.94 | 10140.0 | 0.0
2020-07-2223 | 73.419 | 66.2789 | 5.5930.03 | 10175.6 | 0.22
2020-07-2329 | 84.220 | 68.06511 | 6.8429.94 | 10144.3 | 0.17
2020-07-2424 | 75.219 | 66.27910 | 6.2130.03 | 10176.9 | 0.27
2020-07-2529 | 84.217 | 62.6578 | 4.9730.03 | 10170.0 | 0.0
2020-07-2630 | 86.016 | 60.85115 | 9.3229.91 | 10130.0 | 0.0
2020-07-2732 | 89.619 | 66.25315 | 9.3229.77 | 10080.0 | 0.0
2020-07-2832 | 89.620 | 68.05514 | 8.729.74 | 10072.3 | 0.09
2020-07-2931 | 87.818 | 64.4508 | 4.9729.83 | 10101.7 | 0.07
2020-07-3028 | 82.414 | 57.24614 | 8.729.85 | 10110.0 | 0.0
2020-07-3128 | 82.415 | 59.0478 | 4.9729.8 | 10090.0 | 0.0

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