Having different weathers that are good (day, sun) and bad (night, cloud, rain, fog)
creates the good and bad.
If you remove bad weather, you remove the reason why good weather is appreciated. To a point, remove bad weather and you remove weather.
Add a plateau or lower the chances for bad weather to appear and you will deal with the only real problem : too much bad weather in a row. Removing bad weather completely would be a bad idea.
I know not everyone is that extremist, I wanted to chime in