<Tr> <Th> Percent possible sunshine </Th> <Td> 56 </Td> <Td> 61 </Td> <Td> 66 </Td> <Td> 71 </Td> <Td> 69 </Td> <Td> 65 </Td> <Td> 66 </Td> <Td> 62 </Td> <Td> 59 </Td> <Td> 64 </Td> <Td> 60 </Td> <Td> 55 </Td> <Td> 63 </Td> </Tr> <Tr> <Td_colspan="14"> Source: NOAA (relative humidity and sun 1961--1990) </Td> </Tr> <Table> <Tr> <Th_colspan="14"> (hide) Climate data for Charleston, South Carolina (Downtown), 1981--2010 normals, extremes 1893--present </Th> </Tr> <Tr> <Th> Month </Th> <Th> Jan </Th> <Th> Feb </Th> <Th> Mar </Th> <Th> Apr </Th> <Th> May </Th> <Th> Jun </Th> <Th> Jul </Th> <Th> Aug </Th> <Th> Sep </Th> <Th> Oct </Th> <Th> Nov </Th> <Th> Dec </Th> <Th> Year </Th> </Tr> <Tr> <Th> Record high ° F (° C) </Th> <Td> 82 (28) </Td> <Td> 83 (28) </Td> <Td> 94 (34) </Td> <Td> 94 (34) </Td> <Td> 99 (37) </Td> <Td> 104 (40) </Td> <Td> 103 (39) </Td> <Td> 103 (39) </Td> <Td> 100 (38) </Td> <Td> 95 (35) </Td> <Td> 87 (31) </Td> <Td> 81 (27) </Td> <Td> 104 (40) </Td> </Tr> <Tr> <Th> Mean maximum ° F (° C) </Th> <Td> 71.3 (21.8) </Td> <Td> 74.6 (23.7) </Td> <Td> 79.7 (26.5) </Td> <Td> 84.6 (29.2) </Td> <Td> 90.0 (32.2) </Td> <Td> 94.0 (34.4) </Td> <Td> 96.2 (35.7) </Td> <Td> 94.2 (34.6) </Td> <Td> 91.2 (32.9) </Td> <Td> 85.2 (29.6) </Td> <Td> 79.0 (26.1) </Td> <Td> 73.9 (23.3) </Td> <Td> 97.4 (36.3) </Td> </Tr> <Tr> <Th> Average high ° F (° C) </Th> <Td> 56.7 (13.7) </Td> <Td> 59.6 (15.3) </Td> <Td> 65.0 (18.3) </Td> <Td> 72.0 (22.2) </Td> <Td> 78.7 (25.9) </Td> <Td> 84.5 (29.2) </Td> <Td> 87.6 (30.9) </Td> <Td> 86.4 (30.2) </Td> <Td> 82.0 (27.8) </Td> <Td> 74.6 (23.7) </Td> <Td> 67.3 (19.6) </Td> <Td> 59.5 (15.3) </Td> <Td> 72.8 (22.7) </Td> </Tr> <Tr> <Th> Average low ° F (° C) </Th> <Td> 42.8 (6) </Td> <Td> 45.5 (7.5) </Td> <Td> 51.6 (10.9) </Td> <Td> 58.8 (14.9) </Td> <Td> 67.1 (19.5) </Td> <Td> 74.0 (23.3) </Td> <Td> 76.9 (24.9) </Td> <Td> 76.1 (24.5) </Td> <Td> 71.8 (22.1) </Td> <Td> 62.5 (16.9) </Td> <Td> 53.6 (12) </Td> <Td> 45.6 (7.6) </Td> <Td> 60.5 (15.8) </Td> </Tr> <Tr> <Th> Mean minimum ° F (° C) </Th> <Td> 27.5 (− 2.5) </Td> <Td> 31.6 (− 0.2) </Td> <Td> 36.4 (2.4) </Td> <Td> 44.8 (7.1) </Td> <Td> 55.6 (13.1) </Td> <Td> 66.5 (19.2) </Td> <Td> 71.0 (21.7) </Td> <Td> 69.8 (21) </Td> <Td> 61.6 (16.4) </Td> <Td> 48.1 (8.9) </Td> <Td> 39.1 (3.9) </Td> <Td> 30.2 (− 1) </Td> <Td> 24.8 (− 4) </Td> </Tr> <Tr> <Th> Record low ° F (° C) </Th> <Td> 10 (− 12) </Td> <Td> 7 (− 14) </Td> <Td> 22 (− 6) </Td> <Td> 36 (2) </Td> <Td> 45 (7) </Td> <Td> 52 (11) </Td> <Td> 61 (16) </Td> <Td> 59 (15) </Td> <Td> 50 (10) </Td> <Td> 37 (3) </Td> <Td> 17 (− 8) </Td> <Td> 12 (− 11) </Td> <Td> 7 (− 14) </Td> </Tr> <Tr> <Th> Average precipitation inches (mm) </Th> <Td> 2.94 (74.7) </Td> <Td> 2.51 (63.8) </Td> <Td> 3.30 (83.8) </Td> <Td> 2.53 (64.3) </Td> <Td> 2.16 (54.9) </Td> <Td> 4.65 (118.1) </Td> <Td> 5.40 (137.2) </Td> <Td> 6.71 (170.4) </Td> <Td> 5.76 (146.3) </Td> <Td> 3.67 (93.2) </Td> <Td> 2.19 (55.6) </Td> <Td> 2.60 (66) </Td> <Td> 44.42 (1,128.3) </Td> </Tr> <Tr> <Th> Average precipitation days (≥ 0.01 in) </Th> <Td> 9.0 </Td> <Td> 8.0 </Td> <Td> 7.8 </Td> <Td> 6.9 </Td> <Td> 6.6 </Td> <Td> 10.0 </Td> <Td> 11.3 </Td> <Td> 11.3 </Td> <Td> 8.9 </Td> <Td> 6.6 </Td> <Td> 6.3 </Td> <Td> 8.6 </Td> <Td> 101.3 </Td> </Tr> <Tr> <Td_colspan="14"> Source: NOAA </Td> </Tr> </Table> <Tr> <Th_colspan="14"> (hide) Climate data for Charleston, South Carolina (Downtown), 1981--2010 normals, extremes 1893--present </Th> </Tr>

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