<Tr> <Th_colspan="14"> show Climate data for Fresno, California (Fresno Airport), 1981--2010 normals, extremes 1881--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> 78 (26) </Td> <Td> 84 (29) </Td> <Td> 90 (32) </Td> <Td> 101 (38) </Td> <Td> 110 (43) </Td> <Td> 112 (44) </Td> <Td> 115 (46) </Td> <Td> 113 (45) </Td> <Td> 111 (44) </Td> <Td> 102 (39) </Td> <Td> 90 (32) </Td> <Td> 77 (25) </Td> <Td> 115 (46) </Td> </Tr> <Tr> <Th> Average high ° F (° C) </Th> <Td> 54.8 (12.7) </Td> <Td> 61.6 (16.4) </Td> <Td> 67.6 (19.8) </Td> <Td> 74.6 (23.7) </Td> <Td> 84.1 (28.9) </Td> <Td> 92.0 (33.3) </Td> <Td> 98.4 (36.9) </Td> <Td> 97.1 (36.2) </Td> <Td> 90.9 (32.7) </Td> <Td> 79.5 (26.4) </Td> <Td> 65.1 (18.4) </Td> <Td> 54.9 (12.7) </Td> <Td> 76.7 (24.8) </Td> </Tr>

Where does the central valley start and end