Rain will wash away your lure and urine fast but cold will do the same ,frozen lure and urine will not put out Oder.
The colder the worse it is. Ive had a coyote walk right across a set last week after a dusting of snow with - 5 temps. you could see his tracks he never knew the set was there and I just fresh end it up the day before. It was so cold the the urine froze solid to the back stop. When its that cold I leave a little fur or feathers sticking out as a visual attractant when the weather is bad. I dont know what your laws say about fur or feathers being visible, but up here it can be. I always watch the weather reports and plan accordingly . sometimes you just have to grin and bare it.
The colder the worse it is. Ive had a coyote walk right across a set last week after a dusting of snow with - 5 temps. you could see his tracks he never knew the set was there and I just fresh end it up the day before. It was so cold the the urine froze solid to the back stop. When its that cold I leave a little fur or feathers sticking out as a visual attractant when the weather is bad. I dont know what your laws say about fur or feathers being visible, but up here it can be. I always watch the weather reports and plan accordingly . sometimes you just have to grin and bare it.