I believe there are ways to calculate, roughly, how much water loss you can get from evaporation using available meteorological data. Chem geek has done it in the past for people that believe they have excessive evaporation and fill. If you update your profile with your location (city, state) and you add some details to your signature, then it's easier to figure out.
Well, hopefully you're salinity is down to a level closer to ideal for your Jandy. I'm not sure if regular calibration is required for Jandy's but I do know my Pentair does not allow (new models don't allow field calibration). I read that this was done because too many pool owners would play with the calibration to make errors go away or to get the salinity output to make their test measurements and that would wind up causing problems with the salt cell. Does the Jandy need/require regular calibration?
Yes, I live out on the eastside past Houghton Road in horse farm country (well, not anymore, homes are popping up like mushrooms out here). Sabino Canyon is only a few miles away and we love to hike up there. With the last few rainstorms, the washes and streams are starting to fill up and the foothills are turning green. One more month or so of hot weather and then we'll be in my favorite time of the year - cool Fall months.