I am not sure what you mean but the testes work better at producing sperm when they are slightly cooler than the rest of the body. That is why the testes are in a sack of loose skin (the scrotum)...
Depends on cloud height, density, humidity, wind speed, and I'm sure many other things. If you knew that there was no wind, not an abnormal amount of humidity, and time it fell from a cloud of a...