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Monthly climate in Barnwell, South Carolina, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Barnwell features a humid subtropical climate (Cfa).Temperatures typically range between 10 °C (50 °F) and 28 °C (82 °F) through the year, but rarely can drop to -8 °C (18 °F) or can rise to as high as 39 °C (102 °F).The average annual precipitation amounts to about 1229 mm (48.4 inches) and receives 125 rainy days on the 1 mm (0.04 inches) threshold annually.Barnwell enjoys an average of 3175 hours of sunshine throughout the year, and daylight varies from 9 hours 58 minutes to 14 hours 18 minutes per day.

Monthly average temperatures in Barnwell, South Carolina, United States §

The warmest months in Barnwell are June, July and August, with daily mean temperatures ranging from 26 to 28 °C (79 - 82 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 10 to 13 °C (50 - 55 °F) throughout the day. On average each year, Barnwell experiences 179 days above 25 °C (77.0 °F) and 15 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Barnwell, South Carolina, 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 27°C
(80°F)		 29°C
(84°F)		 32°C
(90°F)		 33°C
(92°F)		 38°C
(101°F)		 39°C
(102°F)		 39°C
(102°F)		 38°C
(100°F)		 38°C
(100°F)		 38°C
(100°F)		 31°C
(87°F)		 26°C
(80°F)
Mean maximum 24°C
(76°F)		 27°C
(82°F)		 30°C
(86°F)		 31°C
(89°F)		 35°C
(95°F)		 35°C
(96°F)		 38°C
(100°F)		 36°C
(98°F)		 35°C
(96°F)		 34°C
(93°F)		 29°C
(84°F)		 24°C
(76°F)
Average high 15°C
(60°F)		 19°C
(66°F)		 21°C
(71°F)		 25°C
(77°F)		 29°C
(85°F)		 31°C
(88°F)		 33°C
(92°F)		 32°C
(91°F)		 31°C
(89°F)		 27°C
(81°F)		 20°C
(68°F)		 17°C
(62°F)
Daily mean 10°C
(50°F)		 13°C
(55°F)		 15°C
(60°F)		 19°C
(66°F)		 23°C
(74°F)		 26°C
(79°F)		 28°C
(82°F)		 27°C
(81°F)		 26°C
(78°F)		 21°C
(70°F)		 13°C
(56°F)		 11°C
(52°F)
Average low 5°C
(41°F)		 7°C
(45°F)		 9°C
(49°F)		 13°C
(55°F)		 18°C
(64°F)		 21°C
(71°F)		 23°C
(74°F)		 23°C
(74°F)		 21°C
(69°F)		 16°C
(61°F)		 8°C
(46°F)		 6°C
(43°F)
Mean minimum -4°C
(24°F)		 -3°C
(28°F)		 -2°C
(28°F)		 3°C
(38°F)		 9°C
(49°F)		 16°C
(61°F)		 20°C
(68°F)		 19°C
(67°F)		 14°C
(58°F)		 6°C
(44°F)		 -1°C
(31°F)		 -3°C
(27°F)
Minimum -8°C
(18°F)		 -4°C
(24°F)		 -4°C
(25°F)		 -0°C
(31°F)		 6°C
(43°F)		 13°C
(55°F)		 17°C
(64°F)		 17°C
(62°F)		 11°C
(52°F)		 2°C
(36°F)		 -3°C
(28°F)		 -5°C
(23°F)

Compare climate in Barnwell with other places

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

Monthly average precipitation in Barnwell, South Carolina, United States §

Barnwell usually has the most precipitation in July, August and December, with an average of 14 rainy days and 136 mm (5.4 inches) of precipitation per month.The driest months in Barnwell are March, October and November. On average, 69 mm (2.7 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Barnwell, South Carolina, 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) 85 (3.3) 106 (4.2) 76 (3.0) 110 (4.3) 99 (3.9) 126 (4.9) 143 (5.6) 137 (5.4) 88 (3.4) 72 (2.8) 61 (2.4) 128 (5.1)
Average precipitation days (≥ 1 mm) 8 10 9 8 9 15 16 18 8 7 7 10

Monthly sunshine hours in Barnwell, South Carolina, United States §

The sunniest months in Barnwell are May, June and July, when the sun shines an average of 10 hours 24 minutes a day.Least sunny months in Barnwell: January, February and December receive an average of 6 hours 7 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Barnwell, South Carolina, 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 172 182 259 285 312 306 338 303 291 277 242 202
Mean daily daylight hours 10h 12m 10h 59m 11h 59m 13h 1m 13h 53m 14h 18m 14h 4m 13h 18m 12h 19m 11h 18m 10h 25m 9h 58m

Solar UV radiation in Barnwell, South Carolina, United States §

Barnwell experiences the highest level of ultraviolet (UV) radiation in May, July and August, when the maximum UV index can reach values of 11 - 11, which corresponds to the Extreme category of sun exposure.January, November and December are in the Moderate / High exposure category. In these months, the maximum values of the UV index do not exceed 6. For more detailed information, check out our hourly Barnwell UV Index data.

Average daily maximum UV levels by month for Barnwell, South Carolina, 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) 4 7 8 10 11 11 11 11 9 8 6 4