diff --git a/mods/CORE/mcl_worlds/init.lua b/mods/CORE/mcl_worlds/init.lua
index 234ef5229..da5999444 100644
--- a/mods/CORE/mcl_worlds/init.lua
+++ b/mods/CORE/mcl_worlds/init.lua
@@ -83,3 +83,54 @@ end
 -- Takes a position (pos) and returns true if clocks are working here
 mcl_worlds.clock_works = mcl_worlds.compass_works
 
+--------------- CALLBACKS ------------------
+mcl_worlds.registered_on_dimension_change = {}
+
+-- Register a callback function func(player, dimension).
+-- It will be called whenever a player changes between dimensions.
+-- The void counts as dimension.
+-- * player: The player who changed the dimension
+-- * dimension: The new dimension of the player ("overworld", "nether", "end", "void").
+function mcl_worlds.register_on_dimension_change(func)
+	table.insert(mcl_worlds.registered_on_dimension_change, func)
+end
+
+-- Playername-indexed table containig the name of the last known dimension the
+-- player was in.
+local last_dimension = {}
+
+-- Notifies this mod about a dimension change of a player.
+-- * player: Player who changed the dimension
+function mcl_worlds.dimension_change(player, dimension)
+	for i=1, #mcl_worlds.registered_on_dimension_change do
+		mcl_worlds.registered_on_dimension_change[i](player, dimension)
+		last_dimension[player:get_player_name()] = dimension
+	end
+end
+
+----------------------- INTERNAL STUFF ----------------------
+
+-- Update the dimension callbacks every DIM_UPDATE seconds
+local DIM_UPDATE = 1
+local dimtimer = 0
+
+minetest.register_on_joinplayer(function(player)
+	last_dimension[player:get_player_name()] = mcl_worlds.pos_to_dimension(player:get_pos())
+end)
+
+minetest.register_globalstep(function(dtime)
+	-- regular updates based on iterval
+	dimtimer = dimtimer + dtime;
+	if dimtimer >= DIM_UPDATE then
+		local players = minetest.get_connected_players()
+		for p=1, #players do
+			local dim = mcl_worlds.pos_to_dimension(players[p]:get_pos())
+			local name = players[p]:get_player_name()
+			if dim ~= last_dimension[name] then
+				mcl_worlds.dimension_change(players[p], dim)
+			end
+		end
+		dimtimer = 0
+	end
+end)
+
diff --git a/mods/ENVIRONMENT/mcl_weather/skycolor.lua b/mods/ENVIRONMENT/mcl_weather/skycolor.lua
index dd8185a34..ab8ab5a63 100644
--- a/mods/ENVIRONMENT/mcl_weather/skycolor.lua
+++ b/mods/ENVIRONMENT/mcl_weather/skycolor.lua
@@ -6,7 +6,7 @@ mcl_weather.skycolor = {
 	force_update = true,
 
 	-- Update interval.
-	update_interval = 0.5,
+	update_interval = 15,
 
 	-- Main sky colors: starts from midnight to midnight. 
 	-- Please do not set directly. Use add_layer instead.
@@ -240,3 +240,7 @@ end
 
 minetest.register_on_joinplayer(initsky)
 minetest.register_on_respawnplayer(initsky)
+
+mcl_worlds.register_on_dimension_change(function(player)
+	mcl_weather.skycolor.update_sky_color({player})
+end)
diff --git a/mods/ENVIRONMENT/mcl_weather/weather_core.lua b/mods/ENVIRONMENT/mcl_weather/weather_core.lua
index f5a9f62eb..6fab2e25e 100644
--- a/mods/ENVIRONMENT/mcl_weather/weather_core.lua
+++ b/mods/ENVIRONMENT/mcl_weather/weather_core.lua
@@ -218,3 +218,5 @@ local weather_allow_abm = minetest.settings:get_bool("weather_allow_abm")
 if weather_allow_abm ~= nil and weather_allow_abm == false then
   mcl_weather.allow_abm = false
 end 
+
+
diff --git a/mods/ITEMS/mcl_portals/portal_end.lua b/mods/ITEMS/mcl_portals/portal_end.lua
index c7638a5f9..24a58a7d4 100644
--- a/mods/ITEMS/mcl_portals/portal_end.lua
+++ b/mods/ITEMS/mcl_portals/portal_end.lua
@@ -267,6 +267,7 @@ minetest.register_abm({
 					if dim ~= "end" then
 						obj:set_look_horizontal(math.pi/2)
 					end
+					mcl_worlds.dimension_change(obj, mcl_worlds.pos_to_dimension(target))
 					minetest.sound_play("mcl_portals_teleport", {pos=target, gain=0.5, max_hear_distance = 16})
 				end
 			end
diff --git a/mods/ITEMS/mcl_portals/portal_nether.lua b/mods/ITEMS/mcl_portals/portal_nether.lua
index 8b0efea6e..cd47ff8ac 100644
--- a/mods/ITEMS/mcl_portals/portal_nether.lua
+++ b/mods/ITEMS/mcl_portals/portal_nether.lua
@@ -434,6 +434,7 @@ minetest.register_abm({
 
 						-- Teleport
 						obj:set_pos(target)
+						mcl_worlds.dimension_change(obj, mcl_worlds.pos_to_dimension(target))
 						if obj:is_player() then
 							minetest.sound_play("mcl_portals_teleport", {pos=target, gain=0.5, max_hear_distance = 16})
 						end