Another option -- one of many, obviously -- is a length of double-sided velcro strip ("rip tie") that can wrap around your pants leg. I keep one wrapped around the head tube of my bike so that it's always there. I can also clip my cellphone to it if needed; it's generally useful for other things, too.

As to weather, well it's like that in other hobbies as well. I'm an amateur astronomer (currently pretty inactive, though) and it's always easy to forecast the weather after a new scope purchase: Thunderstorms, overcast and rain.