command is works but there are not cfg file 
I cannot setting

It doesn't have a configuration.

{ "EnableInGameTime-Timer": false, "EnableRealTime-Timer": false, "EnableTimerOnce": true, "EnableTimerRepeat": true, "InGameTime-Timer": { Don't put weather commands in this section. }, "RealTime-Timer": { Don't put weather commands in this section. }, "TimerOnce": { "weather.clear_chance 1": 5, "weather.dust_chance 0": 6, "weather.fog_chance 0": 7, "weather.overcast_chance 0": 8, "weather.rain_chance 0": 9, "weather.storm_chance 0": 10 }, "TimerRepeat": { "rw random": 7200 } }

how to use it?

That is an example to use with the Timed Execute plugin.

thanks