Charleston Weather History (SC)

Summary
  Temp.
(ºF)
Relative Humidity
(Percentage)
Extreme Temp.
(Days Per Month)
Rain
(Inches)
Cloudiness
(Days Per Month)
  Average A.M. P.M. Below
32º
Above
90º
Average Clear Partly
Cloudy
Cloudy
January 32.1 78% 63% 23 0 2.9 4 6 21
February 35.5 77% 59% 20 0 3.0 4 6 18
March 45.9 76% 53% 15 0 3.6 5 8 19
April 54.8 76% 48% 5 N/A 3.3 6 8 16
May 63.5 84% 52% N/A 1 3.9 6 10 15
June 71.4 87% 55% 0 5 3.6 5 13 12
July 75.1 90% 60% 0 8 5.0 5 13 13
August 73.9 93% 58% 0 5 4.0 5 14 12
September 67.7 92% 57% 0 2 3.2 7 11 12
October 56.2 89% 54% 3 N/A 2.9 9 9 13
November 46.8 81% 57% 13 0 3.6 5 7 18
December 37.0 79% 63% 21 0 3.4 5 6 20
Annual 55.0 83% 56% 99 21 42.5 65 111 189


Average Temperature (ºF)
Jan. Feb. Mar. Apr. May. Jun. Jul. Aug. Sep. Oct. Nov. Dec.
32.1 35.5 45.9 54.8 63.5 71.4 75.1 73.9 67.7 56.2 46.8 37.0

Relative Humidity (Percentage)
Morning
Jan. Feb. Mar. Apr. May. Jun. Jul. Aug. Sep. Oct. Nov. Dec.
78% 77% 76% 76% 84% 87% 90% 93% 92% 89% 81% 79%
Afternoon
63% 59% 53% 48% 52% 55% 60% 58% 57% 54% 57% 63%

Rain (Inches)
Jan. Feb. Mar. Apr. May. Jun. Jul. Aug. Sep. Oct. Nov. Dec.
2.9 3.0 3.6 3.3 3.9 3.6 5.0 4.0 3.2 2.9 3.6 3.4

Cloudiness (Days Per Month)
  January February March
Clear 4 Days 4 Days 5 Days
Partly Cloudy 6 Days 6 Days 8 Days
Cloudy 21 Days 19 Days 19 Days
  April May June
Clear 6 Days 6 Days 5 Days
Partly Cloudy 8 Days 10 Days 13 Days
Cloudy 16 Days 15 Days 12 Days
  July August September
Clear 5 Days 5 Days 7 Days
Partly Cloudy 13 Days 14 Days 11 Days
Cloudy 13 Days 12 Days 12 Days
  October November December
Clear 9 Days 5 Days 5 Days
Partly Cloudy 9 Days 7 Days 6 Days
Cloudy 13 Days 18 Days 20 Days
  Clear Partly Cloudy Cloudy
 
Days Per Year 65 111 189


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