Climate changes
Yes it is possible, it's also very very prone to being
extreme.
add_property("climate",({ ({TEMP_OFFSET,WEIGHT}),
({CLOUD_OFFSET,WEIGHT}),
({RAIN_OFFSET,WEIGHT})
}) );
Keep the offsets small and the weights smaller.
i.e. small adjustments have major effects.
Play with a test room till you get it right.