What needs to be implimented is just a weather prediction system.

You ask for the weather report for each area for lets say, the next 5 days. And you will recibe a chart of possible weathers for said area, so you can do a bit of planning before traveling to maps expecting the weather to be just fine. The system could implement alarms and it could have a nice filter system so you know for example, which areas have chances to have fog, and so on.

Of course, the simple thing to do would be to ask SE to just remove the weather condition of the sightseeing and fishing just leaving the time condition which is previsible for players.

Is hard to belive how wrong an exploration feature can go...