It depends on your location I guess? I for one can definitely tell from my own experience, and I'm not even 30 yet.
Proper winter starts much later and is milder than before, it was 10+ degrees Celsius for the past five or so NYE (didn't even need a winter jacket), summer heat waves are more unbearable and last longer, we went from no serious issues with floods in the spring to a number of entire-towns-are-underwater levels of flooding...
Now some of these did happen before, but as an anomaly, definitely not something that happens multiple years in a row.
Proper winter starts much later and is milder than before, it was 10+ degrees Celsius for the past five or so NYE (didn't even need a winter jacket), summer heat waves are more unbearable and last longer, we went from no serious issues with floods in the spring to a number of entire-towns-are-underwater levels of flooding...
Now some of these did happen before, but as an anomaly, definitely not something that happens multiple years in a row.