<Tr> <Td> Wettest tropical cyclone </Td> <Td> 17.00 inches (432 mm) </Td> <Td> Tropical Storm Jerry (1995) </Td> <Td> Antreville </Td> <Td> Abbeville </Td> </Tr> <P> South Carolina averages around 64 days of thunderstorm activity per year . Most thunderstorms occur during the summer . South Carolina is vulnerable to tornadoes . Some notable tornadoes have struck South Carolina and the state averages around 14 tornadoes annually . There have been no F - 5 tornadoes on record but over a dozen F - 4 tornadoes have occurred in many counties in South Carolina . </P> <Table> <Tr> <Th_colspan="14"> (hide) Climate data for Greenville, South Carolina (Greenville--Spartanburg Int'l), 1981--2010 normals, extremes 1884--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> 81 (27) </Td> <Td> 91 (33) </Td> <Td> 94 (34) </Td> <Td> 100 (38) </Td> <Td> 105 (41) </Td> <Td> 107 (42) </Td> <Td> 105 (41) </Td> <Td> 101 (38) </Td> <Td> 97 (36) </Td> <Td> 86 (30) </Td> <Td> 79 (26) </Td> <Td> 107 (42) </Td> </Tr> <Tr> <Th> Mean maximum ° F (° C) </Th> <Td> 69.4 (20.8) </Td> <Td> 72.5 (22.5) </Td> <Td> 80.8 (27.1) </Td> <Td> 86.0 (30) </Td> <Td> 90.2 (32.3) </Td> <Td> 95.1 (35.1) </Td> <Td> 97.3 (36.3) </Td> <Td> 95.9 (35.5) </Td> <Td> 91.1 (32.8) </Td> <Td> 84.4 (29.1) </Td> <Td> 77.1 (25.1) </Td> <Td> 69.5 (20.8) </Td> <Td> 98.6 (37) </Td> </Tr> <Tr> <Th> Average high ° F (° C) </Th> <Td> 52.4 (11.3) </Td> <Td> 56.6 (13.7) </Td> <Td> 64.5 (18.1) </Td> <Td> 72.8 (22.7) </Td> <Td> 80.2 (26.8) </Td> <Td> 87.5 (30.8) </Td> <Td> 90.3 (32.4) </Td> <Td> 88.6 (31.4) </Td> <Td> 82.2 (27.9) </Td> <Td> 72.8 (22.7) </Td> <Td> 63.5 (17.5) </Td> <Td> 54.1 (12.3) </Td> <Td> 72.1 (22.3) </Td> </Tr> <Tr> <Th> Average low ° F (° C) </Th> <Td> 32.0 (0) </Td> <Td> 34.9 (1.6) </Td> <Td> 41.2 (5.1) </Td> <Td> 48.3 (9.1) </Td> <Td> 57.2 (14) </Td> <Td> 65.8 (18.8) </Td> <Td> 69.4 (20.8) </Td> <Td> 68.7 (20.4) </Td> <Td> 61.8 (16.6) </Td> <Td> 50.4 (10.2) </Td> <Td> 41.3 (5.2) </Td> <Td> 34.0 (1.1) </Td> <Td> 50.4 (10.2) </Td> </Tr> <Tr> <Th> Mean minimum ° F (° C) </Th> <Td> 14.6 (− 9.7) </Td> <Td> 19.0 (− 7.2) </Td> <Td> 24.2 (− 4.3) </Td> <Td> 32.6 (0.3) </Td> <Td> 42.7 (5.9) </Td> <Td> 55.0 (12.8) </Td> <Td> 61.7 (16.5) </Td> <Td> 60.7 (15.9) </Td> <Td> 47.9 (8.8) </Td> <Td> 34.1 (1.2) </Td> <Td> 26.0 (− 3.3) </Td> <Td> 18.1 (− 7.7) </Td> <Td> 11.8 (− 11.2) </Td> </Tr> <Tr> <Th> Record low ° F (° C) </Th> <Td> − 6 (− 21) </Td> <Td> − 5 (− 21) </Td> <Td> 11 (− 12) </Td> <Td> 22 (− 6) </Td> <Td> 27 (− 3) </Td> <Td> 40 (4) </Td> <Td> 53 (12) </Td> <Td> 50 (10) </Td> <Td> 32 (0) </Td> <Td> 25 (− 4) </Td> <Td> 11 (− 12) </Td> <Td> (− 16) </Td> <Td> − 6 (− 21) </Td> </Tr> <Tr> <Th> Average precipitation inches (mm) </Th> <Td> 3.82 (97) </Td> <Td> 3.97 (100.8) </Td> <Td> 4.52 (114.8) </Td> <Td> 3.36 (85.3) </Td> <Td> 3.76 (95.5) </Td> <Td> 3.80 (96.5) </Td> <Td> 4.80 (121.9) </Td> <Td> 4.48 (113.8) </Td> <Td> 3.43 (87.1) </Td> <Td> 3.44 (87.4) </Td> <Td> 3.70 (94) </Td> <Td> 4.11 (104.4) </Td> <Td> 47.19 (1,198.6) </Td> </Tr> <Tr> <Th> Average snowfall inches (cm) </Th> <Td> 2.3 (5.8) </Td> <Td> 1.0 (2.5) </Td> <Td> 0.9 (2.3) </Td> <Td> trace </Td> <Td> 0 (0) </Td> <Td> 0 (0) </Td> <Td> 0 (0) </Td> <Td> 0 (0) </Td> <Td> 0 (0) </Td> <Td> 0 (0) </Td> <Td> 0.1 (0.3) </Td> <Td> 0.4 (1) </Td> <Td> 4.7 (11.9) </Td> </Tr> <Tr> <Th> Average precipitation days (≥ 0.01 in) </Th> <Td> 10.2 </Td> <Td> 9.2 </Td> <Td> 9.6 </Td> <Td> 9.0 </Td> <Td> 9.7 </Td> <Td> 10.4 </Td> <Td> 11.7 </Td> <Td> 10.4 </Td> <Td> 8.1 </Td> <Td> 7.2 </Td> <Td> 8.9 </Td> <Td> 9.8 </Td> <Td> 114.2 </Td> </Tr> <Tr> <Th> Average snowy days (≥ 0.1 in) </Th> <Td> </Td> <Td> 0.7 </Td> <Td> 0.3 </Td> <Td> 0.1 </Td> <Td> 0 </Td> <Td> 0 </Td> <Td> 0 </Td> <Td> 0 </Td> <Td> 0 </Td> <Td> 0 </Td> <Td> 0.1 </Td> <Td> 0.4 </Td> <Td> 2.8 </Td> </Tr> <Tr> <Th> Average relative humidity (%) </Th> <Td> 65.8 </Td> <Td> 62.6 </Td> <Td> 62.1 </Td> <Td> 60.7 </Td> <Td> 68.5 </Td> <Td> 70.5 </Td> <Td> 74.0 </Td> <Td> 75.6 </Td> <Td> 75.8 </Td> <Td> 70.9 </Td> <Td> 68.2 </Td> <Td> 67.7 </Td> <Td> 68.5 </Td> </Tr> <Tr> <Th> Mean monthly sunshine hours </Th> <Td> 176.6 </Td> <Td> 182.7 </Td> <Td> 236.2 </Td> <Td> 264.7 </Td> <Td> 269.2 </Td> <Td> 270.8 </Td> <Td> 267.8 </Td> <Td> 253.9 </Td> <Td> 229.2 </Td> <Td> 235.2 </Td> <Td> 184.3 </Td> <Td> 169.4 </Td> <Td> 2,740 </Td> </Tr> <Tr> <Th> Percent possible sunshine </Th> <Td> 56 </Td> <Td> 60 </Td> <Td> 64 </Td> <Td> 68 </Td> <Td> 62 </Td> <Td> 62 </Td> <Td> 61 </Td> <Td> 61 </Td> <Td> 62 </Td> <Td> 67 </Td> <Td> 59 </Td> <Td> 55 </Td> <Td> 62 </Td> </Tr> <Tr> <Td_colspan="14"> Source: NOAA (relative humidity 1962--1990, sun 1961--1990) </Td> </Tr> </Table> <Tr> <Th_colspan="14"> (hide) Climate data for Greenville, South Carolina (Greenville--Spartanburg Int'l), 1981--2010 normals, extremes 1884--present </Th> </Tr>

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