MAKE WEATHER CHANGE

To allow weather to change aleatory, crate text file, past the following code inside and save as init_weather.sqf

Note : in green you can change hour and date

/*
   Simple weather script
   init_weather.sqf
   by Nark0t1k
*/
/*
if(isDedicated)then
{
   while {true}do
   {
       40 setfog 0;
       40 setRain 0;
       0 setOvercast 0;
       sleep 600;
   };
};

if (!isDedicated) then
{
   while {true}do
   {
       40 setfog 0;
       40 setRain 0;
       0 setOvercast 0;
       uiSleep 600;
   };
};
*/

   private ["_lastrain", "_rain", "_fog", "_mintime", "_maxtime", "_overcast", "_realtime", "_random", "_skiptime", "_startingdate", "_startingweather", "_timeforecast", "_timeratio", "_timesync", "_wind"];

   // Real time vs fast time
   // true: Real time is more realistic weather conditions change slowly (ideal for persistent game)
   // false: fast time give more different weather conditions (ideal for non persistent game)
   _realtime = true;

   // Random time before new forecast
   // true: forecast happens bewteen mintime and maxtime
   // false: forecast happens at mintime
   _random = false;

   // Min time seconds (real time) before a new weather forecast
   _mintime = 900;

   // Max time seconds (real time) before a new weather forecast
   _maxtime = 14400;

   // If Fastime is on
   // Ratio 1 real time second for x game time seconds
   // Default: 1 real second = 3.6 second in game
   _timeratio = 2;

   // send sync data across the network each xxx seconds
   // 60 seconds by default is a good value
   // shortest time do not improve weather sync
   _timesync = 60;

   // Mission starting date is 25/09/2013 at 12:00
   _startingdate = [2016, 08, 16, 00, 50];

   // Mission starting weather "CLEAR|CLOUDY|RAIN";
   _startingweather = "CLEAR";

   /////////////////////////////////////////////////////////////////
   // Do not edit below
   /////////////////////////////////////////////////////////////////

   if(_mintime > _maxtime) exitwith {hint format["Real weather: Max time: %1 can no be higher than Min time: %2", _maxtime, _mintime];};
   _timeforecast = _mintime;

   // we check the skiptime for 10 seconds
   _skiptime = _timeratio * 0.000278 * 10;

   setdate _startingdate;
   switch(toUpper(_startingweather)) do {
       case "CLEAR": {
           wcweather = [0, 0, 0, [random 3, random 3, true], date];
       };

       case "BROU": {
           wcweather = [0, 1, 1.5, [random 3, random 3, true], date];
       };

       case "BROU2": {
           wcweather = [0, 2, 2.5, [random 3, random 3, true], date];
       };

       case "CLOUDY": {
           wcweather = [0, 0, 0.6, [random 3, random 3, true], date];
       };

       case "CLOUDY2": {
           wcweather = [0, 0, 2.5, [random 3, random 3, true], date];
       };

       case "RAIN": {
           wcweather = [2.5, 0, 2.5, [random 3, random 3, true], date];
       };

       case "RAIN2": {
           wcweather = [1, 0, 2.5, [random 3, random 3, true], date];
       };

       default {
           // clear
           wcweather = [0, 0, 0, [random 3, random 3, true], date];
           diag_log "Real weather: wrong starting weather";
       };
   };

   // add handler
   if (local player) then {
       wcweatherstart = true;
       "wcweather" addPublicVariableEventHandler {
           // first JIP synchronization
           if(wcweatherstart) then {
               wcweatherstart = false;
               skipTime -24;
               86400 setRain (wcweather select 0);
               86400 setfog (wcweather select 1);
               86400 setOvercast (wcweather select 2);
               skipTime 24;
               simulweatherSync;
               setwind (wcweather select 3);
               setdate (wcweather select 4);
           }else{
               wcweather = _this select 1;
               60 setRain (wcweather select 0);
               60 setfog (wcweather select 1);
               60 setOvercast (wcweather select 2);
               setwind (wcweather select 3);
               setdate (wcweather select 4);
           };
       };
   };

   // accelerate time
   if!(_realtime) then {
       [_skiptime] spawn {
           private["_skiptime"];
           _skiptime = _this select 0;

           while {true} do {
               skiptime _skiptime;
               sleep 10;
           };
       };
   };

   // SERVER SIDE SCRIPT
   if (!isServer) exitWith{};

   // apply weather
   skipTime -24;
   86400 setRain (wcweather select 0);
   86400 setfog (wcweather select 1);
   86400 setOvercast (wcweather select 2);
   skipTime 24;
   simulweatherSync;
   setwind (wcweather select 3);
   setdate (wcweather select 4);

   // sync server & client weather & time
   [_timesync] spawn {
       private["_timesync"];
       _timesync = _this select 0;

       while { true } do {
           wcweather set [4, date];
           publicvariable "wcweather";
           sleep _timesync;
       };
   };

   _lastrain = 0;
   _rain = 0;
   _overcast = 0;

   while {true} do {
       _overcast = random 1;
       if(_overcast > 0.68) then {
           _rain = random 1;
       } else {
           _rain = 0;
       };
       if((date select 3 > 2) and (date select 3 <6)) then {
           _fog = 0.4 + (random 0.6);
       } else {
           if((_lastrain > 0.6) and (_rain < 0.2)) then {
               _fog = random 0.3;
           } else {
               _fog = 0;
           };
       };
       if(random 1 > 0.95) then {
           _wind = [random 7, random 7, true];
       } else {
           _wind = [random 3, random 3, true];
       };
       _lastrain = _rain;

       wcweather = [_rain, _fog, _overcast, _wind, date];
       60 setRain (wcweather select 0);
       60 setfog (wcweather select 1);
       60 setOvercast (wcweather select 2);
       setwind (wcweather select 3);
       if(_random) then {
           _timeforecast = _mintime + (random (_maxtime - _mintime));
       };
       sleep _timeforecast;
   };