[FC]

in the map's load.ini file is something about.....

[WORLDPOS]
CAMOUFLAGE = SUMMER
MONTH=7
DECLIN = 50
PRESSURE = 745
TEMPERATURE = 25


maybe these settings are relevant..??

That looks very promising.

Rain/snow depend on month set for a map, 11-3 are snow months no matter what is temperature setting.

FC