And in fact, for weather the airline can technically give out nada as it it beyond their control - even though some pax do insist mother natures works for the airline as well.
If a flight is cancelled due to weather or even delayed, you really - and legally - could end up with nothing from the airline. You'd have to take it up with your travel insurance.
It just that for good customer services an airline might strecth to a cup of tea and a biscuit.
The new EU rules are full of 'yer but no but' situations.