Here is Perth at 52N in this scenario:
J: 41/27 7.20"
F: 43/29 7.31"
M: 47/32 7.29"
A: 52/37 7.91"
M: 59/43 5.57"
J: 64/47 3.14"
J: 70/50 2.04"
A: 72/51 2.25"
S: 65/45 4.26"
O: 61/39 5.09"
N: 47/32 7.92"
D: 42/29 7.85"
I think the temperatures would be very close to this but the precipitation amounts are harder to guess. Both Perth and Haida Gwaii have their coldest and warmest months in January and August...and the driest and wettest in July and November.