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Monthly climate in South Boston, Virginia, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification South Boston features a humid subtropical climate (Cfa).Temperatures typically range between 5 °C (41 °F) and 27 °C (81 °F) through the year, but rarely can drop to -14 °C (6 °F) or can rise to as high as 38 °C (100 °F).The average annual precipitation amounts to about 1128 mm (44.4 inches) and receives 120 rainy days on the 1 mm (0.04 inches) threshold annually.South Boston enjoys an average of 3160 hours of sunshine throughout the year, and daylight varies from 9 hours 40 minutes to 14 hours 37 minutes per day.

Monthly average temperatures in South Boston, Virginia, United States §

The warmest months in South Boston are June, July and August, with daily mean temperatures ranging from 24 to 27 °C (76 - 81 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 5 to 8 °C (41 - 46 °F) throughout the day. On average each year, South Boston experiences 134 days above 25 °C (77.0 °F) and 46 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in South Boston, Virginia, United States.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to June 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Maximum 24°C
(76°F)		 27°C
(80°F)		 30°C
(86°F)		 31°C
(88°F)		 36°C
(98°F)		 37°C
(99°F)		 38°C
(100°F)		 37°C
(99°F)		 38°C
(100°F)		 36°C
(98°F)		 28°C
(83°F)		 23°C
(73°F)
Mean maximum 21°C
(69°F)		 24°C
(76°F)		 27°C
(81°F)		 29°C
(85°F)		 34°C
(93°F)		 35°C
(95°F)		 37°C
(98°F)		 36°C
(97°F)		 35°C
(94°F)		 32°C
(89°F)		 26°C
(79°F)		 21°C
(70°F)
Average high 10°C
(50°F)		 13°C
(56°F)		 16°C
(62°F)		 22°C
(72°F)		 26°C
(79°F)		 30°C
(85°F)		 33°C
(92°F)		 31°C
(88°F)		 29°C
(84°F)		 23°C
(75°F)		 16°C
(60°F)		 12°C
(54°F)
Daily mean 5°C
(41°F)		 8°C
(46°F)		 11°C
(51°F)		 16°C
(61°F)		 21°C
(69°F)		 24°C
(76°F)		 27°C
(81°F)		 26°C
(79°F)		 23°C
(74°F)		 18°C
(64°F)		 10°C
(50°F)		 7°C
(45°F)
Average low 1°C
(34°F)		 3°C
(37°F)		 5°C
(42°F)		 10°C
(51°F)		 16°C
(60°F)		 19°C
(67°F)		 22°C
(72°F)		 21°C
(71°F)		 18°C
(65°F)		 13°C
(55°F)		 4°C
(40°F)		 2°C
(37°F)
Mean minimum -9°C
(16°F)		 -6°C
(22°F)		 -4°C
(26°F)		 1°C
(34°F)		 5°C
(42°F)		 14°C
(58°F)		 17°C
(63°F)		 16°C
(61°F)		 10°C
(51°F)		 4°C
(39°F)		 -4°C
(25°F)		 -6°C
(22°F)
Minimum -14°C
(6°F)		 -9°C
(17°F)		 -5°C
(23°F)		 -2°C
(29°F)		 2°C
(36°F)		 12°C
(54°F)		 15°C
(59°F)		 14°C
(57°F)		 6°C
(43°F)		 1°C
(35°F)		 -6°C
(22°F)		 -9°C
(16°F)

Compare climate in South Boston with other places

Compare temperature, precipitation, sunshine, UV index in South Boston, Virginia, United States with other places around the world.

Monthly average precipitation in South Boston, Virginia, United States §

South Boston usually has the most precipitation in April, May and August, with an average of 11 rainy days and 113 mm (4.5 inches) of precipitation per month.The driest months in South Boston are January, March and July. On average, 71 mm (2.8 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in South Boston, Virginia, United States.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Average precipitation mm (inches) 73 (2.9) 108 (4.2) 72 (2.8) 120 (4.7) 110 (4.3) 92 (3.6) 69 (2.7) 109 (4.3) 98 (3.9) 106 (4.2) 75 (3.0) 96 (3.8)
Average precipitation days (≥ 1 mm) 8 12 10 11 11 11 10 13 9 9 7 9

Monthly sunshine hours in South Boston, Virginia, United States §

The sunniest months in South Boston are June, July and August, when the sun shines an average of 10 hours 55 minutes a day.Least sunny months in South Boston: January, February and December receive an average of 5 hours 58 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in South Boston, Virginia, United States.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Mean monthly sunshine hours 158 185 256 283 297 324 358 322 281 262 229 199
Mean daily daylight hours 9h 57m 10h 50m 11h 59m 13h 9m 14h 8m 14h 37m 14h 21m 13h 29m 12h 21m 11h 11m 10h 11m 9h 40m

Solar UV radiation in South Boston, Virginia, United States §

South Boston experiences the highest level of ultraviolet (UV) radiation in May, June and August, when the maximum UV index can reach values of 10 - 11, which corresponds to the Very High / Extreme category of sun exposure.January, November and December are in the Moderate exposure category. In these months, the maximum values of the UV index do not exceed 5. For more detailed information, check out our hourly South Boston UV Index data.

Average daily maximum UV levels by month for South Boston, Virginia, United States.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2022 to January 2023.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
UV Index (month maximum) 3 6 7 9 11 11 10 10 9 8 5 3