You can make the message be anything you want.
sendBroadcastNotification("Fenster Schlafzimmer ist ist länger als 10 Minuten geöffnet und and Outside Temperatur is
- Wetterinformation_Temperatur.state.toString + " Degrees")
Depends on your specific requirements. I use one Rule and whenever any door (in my case) has been open for too long I send a single report with ALL the doors that have been open for too long. That way I can handle everything within on Rule as the message doesn’t depend on which sensor timer went off.
Check out the Design Pattern: Simple State Machine (e.g. Time Of Day). With a little work you can expand it to include a state for weekday verses weekend and then your rules would use:
if(vTimeOfDay.state.toString == "EVENING" && vDayType == "WEEKDAY" && Wetterinformation_Temperatur.state <= 10)
Also see Design Pattern: Separation of Behaviors for ways to centralize your alerting so you can do some of these sorts of checks in a central location. For example, at night I use a different alerting mechanism than I do during the day. I send out alerts to specific phones sometimes and broadcast at others (e.g. broadcast when no one is home. But all this logic is in one place so I don’t need these kind of if statements everywhere I generate an alert.