diff --git a/Command-Reference.md b/Command-Reference.md
index 112c63a..a239ba0 100644
--- a/Command-Reference.md
+++ b/Command-Reference.md
@@ -565,6 +565,8 @@ The modify command lets you set the variables for your Multiverse worlds in game
 * diff/difficulty - String/Integer
   - Sets the difficulty of a world. You can use string or integers:
   - Possible values are PEACEFUL - 0, EASY - 1, MEDIUM - 2, HARD - 3 
+* weather - Boolean
+  - Turn weather on/off.
 
 See the [[World Properties]] page for more detail on these variables.