<Tr> <Th> Record high ° F (° C) </Th> <Td> 67 (19) </Td> <Td> 72 (22) </Td> <Td> 83 (28) </Td> <Td> 93 (34) </Td> <Td> 105 (41) </Td> <Td> 106 (41) </Td> <Td> 111 (44) </Td> <Td> 105 (41) </Td> <Td> 103 (39) </Td> <Td> 90 (32) </Td> <Td> 81 (27) </Td> <Td> 69 (21) </Td> <Td> 111 (44) </Td> </Tr> <Tr> <Th> Average high ° F (° C) </Th> <Td> 29.1 (− 1.6) </Td> <Td> 33.7 (0.9) </Td> <Td> 47.0 (8.3) </Td> <Td> 60.0 (15.6) </Td> <Td> 70.6 (21.4) </Td> <Td> 80.1 (26.7) </Td> <Td> 83.5 (28.6) </Td> <Td> 81.2 (27.3) </Td> <Td> 74.9 (23.8) </Td> <Td> 62.2 (16.8) </Td> <Td> 47.8 (8.8) </Td> <Td> 32.8 (0.4) </Td> <Td> 58.58 (14.75) </Td> </Tr> <Tr> <Th> Daily mean ° F (° C) </Th> <Td> 20.8 (− 6.2) </Td> <Td> 24.9 (− 3.9) </Td> <Td> 37.0 (2.8) </Td> <Td> 48.5 (9.2) </Td> <Td> 58.8 (14.9) </Td> <Td> 68.8 (20.4) </Td> <Td> 71.7 (22.1) </Td> <Td> 70.1 (21.2) </Td> <Td> 62.8 (17.1) </Td> <Td> 50.6 (10.3) </Td> <Td> 38.1 (3.4) </Td> <Td> 25.1 (− 3.8) </Td> <Td> 48.1 (8.96) </Td> </Tr> <Tr> <Th> Average low ° F (° C) </Th> <Td> 12.6 (− 10.8) </Td> <Td> 16.2 (− 8.8) </Td> <Td> 26.9 (− 2.8) </Td> <Td> 37.0 (2.8) </Td> <Td> 47.1 (8.4) </Td> <Td> 57.5 (14.2) </Td> <Td> 59.8 (15.4) </Td> <Td> 59.0 (15) </Td> <Td> 50.7 (10.4) </Td> <Td> 39.0 (3.9) </Td> <Td> 28.4 (− 2) </Td> <Td> 17.5 (− 8.1) </Td> <Td> 37.64 (3.13) </Td> </Tr>

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