craftbukkit/nms-patches/net/minecraft/server/commands/CommandWeather.patch

--- a/net/minecraft/server/commands/CommandWeather.java
+++ b/net/minecraft/server/commands/CommandWeather.java
@@ -32,11 +32,11 @@
     }
 
     private static int getDuration(CommandListenerWrapper commandlistenerwrapper, int i, IntProvider intprovider) {
-        return i == -1 ? intprovider.sample(commandlistenerwrapper.getServer().overworld().getRandom()) : i;
+        return i == -1 ? intprovider.sample(commandlistenerwrapper.getLevel().getRandom()) : i; // CraftBukkit - SPIGOT-7680: per-world
     }
 
     private static int setClear(CommandListenerWrapper commandlistenerwrapper, int i) {
-        commandlistenerwrapper.getServer().overworld().setWeatherParameters(getDuration(commandlistenerwrapper, i, WorldServer.RAIN_DELAY), 0, false, false);
+        commandlistenerwrapper.getLevel().setWeatherParameters(getDuration(commandlistenerwrapper, i, WorldServer.RAIN_DELAY), 0, false, false); // CraftBukkit - SPIGOT-7680: per-world
         commandlistenerwrapper.sendSuccess(() -> {
             return IChatBaseComponent.translatable("commands.weather.set.clear");
         }, true);
@@ -44,7 +44,7 @@
     }
 
     private static int setRain(CommandListenerWrapper commandlistenerwrapper, int i) {
-        commandlistenerwrapper.getServer().overworld().setWeatherParameters(0, getDuration(commandlistenerwrapper, i, WorldServer.RAIN_DURATION), true, false);
+        commandlistenerwrapper.getLevel().setWeatherParameters(0, getDuration(commandlistenerwrapper, i, WorldServer.RAIN_DURATION), true, false); // CraftBukkit - SPIGOT-7680: per-world
         commandlistenerwrapper.sendSuccess(() -> {
             return IChatBaseComponent.translatable("commands.weather.set.rain");
         }, true);
@@ -52,7 +52,7 @@
     }
 
     private static int setThunder(CommandListenerWrapper commandlistenerwrapper, int i) {
-        commandlistenerwrapper.getServer().overworld().setWeatherParameters(0, getDuration(commandlistenerwrapper, i, WorldServer.THUNDER_DURATION), true, true);
+        commandlistenerwrapper.getLevel().setWeatherParameters(0, getDuration(commandlistenerwrapper, i, WorldServer.THUNDER_DURATION), true, true); // CraftBukkit - SPIGOT-7680: per-world
         commandlistenerwrapper.sendSuccess(() -> {
             return IChatBaseComponent.translatable("commands.weather.set.thunder");
         }, true);