diff --git a/src/main/java/no/nibio/vips/model/alternariamodel/AlternariaModel.java b/src/main/java/no/nibio/vips/model/alternariamodel/AlternariaModel.java
index 1f45f90d079b4a61b4b0531f7772d49bd9fa7a1f..970f9541f287df69665df8d2e6ec638610777645 100644
--- a/src/main/java/no/nibio/vips/model/alternariamodel/AlternariaModel.java
+++ b/src/main/java/no/nibio/vips/model/alternariamodel/AlternariaModel.java
@@ -341,7 +341,7 @@ public class AlternariaModel extends I18nImpl implements Model{
         
        
         int count = 0;
-                                        
+        Collections.sort(observations);
         for(WeatherObservation weatherObj: observations)
         {