Fixed #11127

core/src/mindustry/type/Weather.java

@@ -281,7 +281,7 @@ public class Weather extends UnlockableContent{
 
     public static class WeatherEntry{
         /** The type of weather used. */
-        public Weather weather;
+        public Weather weather = Weathers.rain;
         /** Minimum and maximum spacing between weather events. Does not include the time of the event itself. */
         public float minFrequency, maxFrequency, minDuration, maxDuration;
         /** Cooldown time before the next weather event takes place This is *state*, not configuration. */

core/src/mindustry/ui/dialogs/CustomRulesDialog.java

@@ -463,6 +463,8 @@ public class CustomRulesDialog extends BaseDialog{
                 int cols = Math.max(1, (int)(Core.graphics.getWidth() / Scl.scl(450)));
                 int idx = 0;
 
+                rules.weather.removeAll(w -> w.weather == null);
+
                 for(WeatherEntry entry : rules.weather){
                     base.top();
                     //main container