Hm. Is this something basic I could figure out with a guide or am I gonna need a step by step? I don't understand what "properties" are, or what I would attach it to (im assuming one of the weather types). At present about all I can do relating to this is create spells and locate the weather types.
I've had a hard time understanding properties too, but I just figured it out last night. The Wiki does a poor job explaining them in laymans terms. Basically, you "assign" a property in the editor (in this case, it would be weather as the type, then you'd choose what type of weather in the drop down box, and then name it "sunnyweather" and attach it to your script by typing
Weather Property sunnyweather Auto
For example.
For instance, say you have a script and in the script you wanted to add a spell to the player. To do it, you'd first in the editor itself, after you've created a new script, go to the "Properties" button, type in a name for your property (like "MyCoolSpell" with a "SPELL" property type), then on the right in the drop down box, pick the actual spell you created in the editor.
Then when you want to give the spell to the player via the script, you'd type in the declairation (see above code sample) using the same name as whatever you decided to name your property in the editor, then you'd use the AddSpell command, and reference that same name.
In other words, it connects your script with other objects, NPC's, spells, quests, etc outside of your script.