diff --git a/applets/weather/package/contents/ui/config/ConfigAppearance.qml b/applets/weather/package/contents/ui/config/ConfigAppearance.qml
--- a/applets/weather/package/contents/ui/config/ConfigAppearance.qml
+++ b/applets/weather/package/contents/ui/config/ConfigAppearance.qml
@@ -157,6 +157,13 @@
 
                 onCheckedChanged: displayConfigPage.configurationChanged();
             }
+
+            QtControls.Label {
+                Layout.row: 2
+                Layout.column: 1
+                visible: !canShowMoreInCompactMode
+                text: i18nc("@info", "Not available in locations with constrained size, like the system tray.")
+            }
         }
     }