>>40844025D means:
This type of climate has at least one month averaging below 0 °C (32 °F) (or −3 °C (27 °F)) and at least one month averaging above 10 °C (50 °F)
f means:No dry season
A means: Hot summer, warmest month averages at least 22 °C (71.6 °F),
B means: Warm summer, warmest month averages below 22 °C (71.6 °F) but at least four months averages above 10 °C (50.0 °F).
C means: only 1–3 months above 10 °C (50.0 °F), coldest month between −3 °C (26.6 °F) and −38 °C (−36.4 °F).
I will do a more in depth analysis when you get on the map proper but this is the basic gest of it.
