Very good, You live in Germany, I live in Nord-est Italy
usually in summer it is hot and there is a lot of humidity. perhaps the temperature value of 21 ° C at 100% is a bit low. I should try to put 24 ° C at 100%
Then I water the lawn for 3 days with 15mm of water, practically 37 minutes per zone.
I could try to insert:
temperature 24 ° = 100%
rain 7mm = 50%
humidity 65% = 100%
what do you think about it?