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Monthly climate in Jefferson, South Carolina, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Jefferson features a humid subtropical climate (Cfa).Temperatures typically range between 7 °C (46 °F) and 27 °C (80 °F) through the year, but rarely can drop to -11 °C (12 °F) or can rise to as high as 37 °C (99 °F).The average annual precipitation amounts to about 1316 mm (51.8 inches) and receives 134 rainy days on the 1 mm (0.04 inches) threshold annually.Jefferson enjoys an average of 3184 hours of sunshine throughout the year, and daylight varies from 9 hours 51 minutes to 14 hours 25 minutes per day.

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

The warmest months in Jefferson are June, July and August, with daily mean temperatures ranging from 25 to 27 °C (77 - 80 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 7 to 10 °C (46 - 51 °F) throughout the day. On average each year, Jefferson experiences 152 days above 25 °C (77.0 °F) and 28 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Jefferson, 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 26°C
(79°F)		 27°C
(80°F)		 30°C
(86°F)		 31°C
(87°F)		 36°C
(96°F)		 37°C
(99°F)		 36°C
(98°F)		 36°C
(97°F)		 35°C
(95°F)		 36°C
(97°F)		 29°C
(84°F)		 27°C
(80°F)
Mean maximum 22°C
(73°F)		 25°C
(77°F)		 28°C
(82°F)		 30°C
(86°F)		 34°C
(93°F)		 34°C
(93°F)		 35°C
(96°F)		 35°C
(95°F)		 34°C
(93°F)		 32°C
(90°F)		 26°C
(80°F)		 23°C
(73°F)
Average high 12°C
(55°F)		 16°C
(61°F)		 18°C
(65°F)		 23°C
(74°F)		 28°C
(82°F)		 30°C
(86°F)		 32°C
(90°F)		 31°C
(88°F)		 29°C
(85°F)		 25°C
(77°F)		 17°C
(63°F)		 14°C
(58°F)
Daily mean 7°C
(46°F)		 10°C
(51°F)		 13°C
(55°F)		 17°C
(63°F)		 22°C
(72°F)		 25°C
(77°F)		 27°C
(80°F)		 26°C
(79°F)		 24°C
(75°F)		 19°C
(66°F)		 11°C
(53°F)		 9°C
(49°F)
Average low 3°C
(37°F)		 5°C
(42°F)		 7°C
(45°F)		 11°C
(53°F)		 17°C
(62°F)		 20°C
(69°F)		 22°C
(73°F)		 22°C
(72°F)		 19°C
(67°F)		 14°C
(58°F)		 6°C
(43°F)		 4°C
(40°F)
Mean minimum -6°C
(21°F)		 -4°C
(24°F)		 -4°C
(26°F)		 1°C
(34°F)		 7°C
(45°F)		 15°C
(59°F)		 19°C
(66°F)		 17°C
(63°F)		 12°C
(54°F)		 4°C
(40°F)		 -3°C
(26°F)		 -4°C
(25°F)
Minimum -11°C
(12°F)		 -6°C
(21°F)		 -6°C
(22°F)		 -2°C
(29°F)		 5°C
(42°F)		 11°C
(52°F)		 16°C
(61°F)		 15°C
(60°F)		 9°C
(48°F)		 1°C
(34°F)		 -5°C
(23°F)		 -7°C
(19°F)

Compare climate in Jefferson with other places

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

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

Jefferson usually has the most precipitation in August, September and December, with an average of 11 rainy days and 134 mm (5.3 inches) of precipitation per month.The driest months in Jefferson are March, October and November. On average, 79 mm (3.1 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Jefferson, 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) 96 (3.8) 120 (4.7) 82 (3.2) 108 (4.2) 119 (4.7) 117 (4.6) 118 (4.6) 132 (5.2) 139 (5.5) 75 (2.9) 80 (3.2) 131 (5.2)
Average precipitation days (≥ 1 mm) 9 11 11 9 11 15 17 17 9 8 8 9

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

The sunniest months in Jefferson are June, July and August, when the sun shines an average of 10 hours 37 minutes a day.Least sunny months in Jefferson: 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 Jefferson, 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 168 183 250 284 310 316 344 316 297 273 234 205
Mean daily daylight hours 10h 7m 10h 56m 11h 59m 13h 4m 13h 58m 14h 25m 14h 11m 13h 22m 12h 20m 11h 15m 10h 19m 9h 51m

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

Jefferson experiences the highest level of ultraviolet (UV) radiation in May, June and July, when the maximum UV index can reach values of 11 - 11, which corresponds to the Extreme category of sun exposure.January, February 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 Jefferson UV Index data.

Average daily maximum UV levels by month for Jefferson, 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 6 8 10 11 11 11 10 9 8 6 4