<Tr> <Th> Average high ° C (° F) </Th> <Td> 8.8 (47.8) </Td> <Td> 8.9 (48) </Td> <Td> 10.7 (51.3) </Td> <Td> 12.4 (54.3) </Td> <Td> 15.2 (59.4) </Td> <Td> 18.0 (64.4) </Td> <Td> 20.2 (68.4) </Td> <Td> 19.6 (67.3) </Td> <Td> 17.3 (63.1) </Td> <Td> 14.0 (57.2) </Td> <Td> 11.0 (51.8) </Td> <Td> 9.3 (48.7) </Td> <Td> 13.8 (56.8) </Td> </Tr> <Tr> <Th> Daily mean ° C (° F) </Th> <Td> 6.4 (43.5) </Td> <Td> 6.4 (43.5) </Td> <Td> 8.0 (46.4) </Td> <Td> 9.4 (48.9) </Td> <Td> 12.1 (53.8) </Td> <Td> 14.8 (58.6) </Td> <Td> 16.9 (62.4) </Td> <Td> 16.5 (61.7) </Td> <Td> 14.4 (57.9) </Td> <Td> 11.4 (52.5) </Td> <Td> 8.6 (47.5) </Td> <Td> 6.9 (44.4) </Td> <Td> 11.0 (51.8) </Td> </Tr> <Tr> <Th> Average low ° C (° F) </Th> <Td> 3.9 (39) </Td> <Td> 3.9 (39) </Td> <Td> 5.2 (41.4) </Td> <Td> 6.4 (43.5) </Td> <Td> 9.0 (48.2) </Td> <Td> 11.6 (52.9) </Td> <Td> 13.5 (56.3) </Td> <Td> 13.3 (55.9) </Td> <Td> 11.4 (52.5) </Td> <Td> 8.8 (47.8) </Td> <Td> 6.2 (43.2) </Td> <Td> 4.5 (40.1) </Td> <Td> 8.2 (46.8) </Td> </Tr> <Tr> <Th> Average rainfall mm (inches) </Th> <Td> 62.6 (2.465) </Td> <Td> 46.1 (1.815) </Td> <Td> 51.8 (2.039) </Td> <Td> 50.2 (1.976) </Td> <Td> 57.9 (2.28) </Td> <Td> 59.2 (2.331) </Td> <Td> 50.5 (1.988) </Td> <Td> 65.3 (2.571) </Td> <Td> 56.7 (2.232) </Td> <Td> 76.0 (2.992) </Td> <Td> 69.4 (2.732) </Td> <Td> 68.7 (2.705) </Td> <Td> 714.6 (28.134) </Td> </Tr>

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