Can someone explain to me how dry and wet bulbs are related to relative humidity?

If it is humid and/or hot out, the wet bulb (since it is wet) evaporates water, causing the gauge to go up. I'm not sure about dry bulb though.

This is all you, but i can give you some topics that you could try. if it rained when you want to do something outdoors, it 'limits' that human activity. maybe you want to do an experiment that goes throughout the whole year and you have to have above freezing the entire year. this 'limits' your activity. i thought of those just off of the top of my head. something that gets to me that might be getting to you is you are thinking too hard about what to do. think simply, and if it is too simple, then bump it up just a little bit.

Did you know it's illegal to own only one guinea pig in switzerland?   : )