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Monthly climate in Charleston, Mississippi, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Charleston features a humid subtropical climate (Cfa).Temperatures typically range between 7 °C (45 °F) and 28 °C (82 °F) through the year, but rarely can drop to -13 °C (8 °F) or can rise to as high as 38 °C (101 °F).The average annual precipitation amounts to about 1558 mm (61.3 inches) and receives 133 rainy days on the 1 mm (0.04 inches) threshold annually.Charleston enjoys an average of 3021 hours of sunshine throughout the year, and daylight varies from 9 hours 54 minutes to 14 hours 22 minutes per day.

Monthly average temperatures in Charleston, Mississippi, United States §

The warmest months in Charleston 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 7 to 10 °C (45 - 50 °F) throughout the day. On average each year, Charleston experiences 150 days above 25 °C (77.0 °F) and 24 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Charleston, Mississippi, 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)		 30°C
(86°F)		 35°C
(95°F)		 35°C
(95°F)		 36°C
(97°F)		 36°C
(97°F)		 38°C
(101°F)		 37°C
(99°F)		 27°C
(82°F)		 26°C
(80°F)
Mean maximum 23°C
(73°F)		 24°C
(75°F)		 27°C
(82°F)		 29°C
(84°F)		 32°C
(91°F)		 34°C
(93°F)		 35°C
(96°F)		 35°C
(96°F)		 35°C
(94°F)		 32°C
(90°F)		 25°C
(78°F)		 23°C
(74°F)
Average high 12°C
(54°F)		 15°C
(59°F)		 20°C
(68°F)		 22°C
(73°F)		 27°C
(81°F)		 31°C
(87°F)		 32°C
(90°F)		 32°C
(90°F)		 30°C
(87°F)		 25°C
(77°F)		 17°C
(63°F)		 15°C
(59°F)
Daily mean 7°C
(45°F)		 10°C
(49°F)		 14°C
(58°F)		 17°C
(63°F)		 22°C
(73°F)		 26°C
(79°F)		 28°C
(82°F)		 27°C
(81°F)		 25°C
(78°F)		 19°C
(67°F)		 11°C
(53°F)		 10°C
(50°F)
Average low 3°C
(38°F)		 5°C
(41°F)		 9°C
(49°F)		 12°C
(53°F)		 18°C
(64°F)		 22°C
(71°F)		 24°C
(75°F)		 23°C
(73°F)		 20°C
(69°F)		 14°C
(58°F)		 6°C
(43°F)		 5°C
(41°F)
Mean minimum -7°C
(19°F)		 -5°C
(23°F)		 -1°C
(31°F)		 3°C
(37°F)		 11°C
(52°F)		 17°C
(63°F)		 20°C
(68°F)		 19°C
(66°F)		 15°C
(59°F)		 5°C
(41°F)		 -2°C
(29°F)		 -3°C
(27°F)
Minimum -13°C
(9°F)		 -13°C
(8°F)		 -4°C
(25°F)		 0°C
(32°F)		 8°C
(47°F)		 14°C
(57°F)		 18°C
(64°F)		 18°C
(64°F)		 12°C
(54°F)		 0°C
(33°F)		 -7°C
(20°F)		 -5°C
(22°F)

Compare climate in Charleston with other places

Compare temperature, precipitation, sunshine, UV index in Charleston, Mississippi, United States with other places around the world.

Monthly average precipitation in Charleston, Mississippi, United States §

Charleston usually has the most precipitation in February, March and April, with an average of 13 rainy days and 171 mm (6.7 inches) of precipitation per month.The driest months in Charleston are July, September and November. On average, 99 mm (3.9 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Charleston, Mississippi, 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) 120 (4.7) 195 (7.7) 168 (6.6) 149 (5.9) 115 (4.5) 134 (5.3) 112 (4.4) 124 (4.9) 100 (3.9) 113 (4.5) 84 (3.3) 143 (5.6)
Average precipitation days (≥ 1 mm) 9 15 14 10 11 14 13 13 7 9 8 10

Monthly sunshine hours in Charleston, Mississippi, United States §

The sunniest months in Charleston are June, July and August, when the sun shines an average of 10 hours 25 minutes a day.Least sunny months in Charleston: January, February and December receive an average of 5 hours 25 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Charleston, Mississippi, 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 146 159 216 260 307 309 339 309 288 267 227 188
Mean daily daylight hours 10h 9m 10h 58m 11h 59m 13h 3m 13h 56m 14h 22m 14h 7m 13h 20m 12h 20m 11h 17m 10h 22m 9h 54m

Solar UV radiation in Charleston, Mississippi, United States §

Charleston 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, 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 Charleston UV Index data.

Average daily maximum UV levels by month for Charleston, Mississippi, 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 10 9 7 6 4