Elevation 4000- what is elr temperature?

to estimate the temperature at 4,000 feet, the ELR shows that there should be a decrease of 15 F (2 x 7.5) moving from 2,000 feet to 4,000 feet. Since the air at 2,000 feet is 40F, the air at 4,000 feet is 25F (40F - 15F).

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.