So with in light of the new complicated Weather Machine system which automatically changes the weather based on preset probabilities and the lack of an extensive and updated Help Guide as of yet, I figure people were wondering on what the probabilities exactly were. This is mainly being posted for the community's sake so they can perhaps suggest some tweaks on the proportions and such.

If you want to play around with it without the need of hosting, here's a desktop version I made a while back which uses the exact same system as RPU's: https://sites.google.com/site/rpgdreamtools/rpgtools/ weathermachine

For those not really willing to install something they don't trust (understandably), I'll directly post the most updated proportions here.

Weather Machine Probabilities as of RPU v1.5.3B
(Snow only occurs during the 'Winter Months', which are calculated based on '8/8' or '1/8' of the current IC month compared to the total months in a year. Mountainous ignores this and has a chance for year-round snow.

Default:
Clouds: 66.67%
Precipitation: 28.57%
Tropical Systems: 4.76%

AridL
Clouds: 95%
Precipitation: 5%
Tropical Systems: 0%

Coastal:
Clouds: 25%
Precipitation: 60%
Tropical Systems: 15%

Mountainous:
Clouds: 50%
Precipitation: 50%
Tropical Systems: 0%

Semi-Arid:
Clouds: 90%
Precipitation: 10%
Tropical Systems: 0%

Temperate:
Clouds: 66.67%
Precipitation: 33.33%
Tropical Systems: 0%

Tropical: (Think jungle or rainforest)
Clouds: 5%
Precipitation: 80%
Tropical Systems: 15%

Tundra:
Clouds: 33.33%
Precipitation: 66.67%
Tropical Systems: 0%