That's very easy. If it is colder then usual, its the weather. Newspaper and TV Stations do not inform about that, because it would just confuse you. If it's hotter then usual, it's climate change. Actually its a climat catastrophe already. Newspaper will report about it using bright red in weather maps, together with TV Stations. They like to cut month short if it gets a cold spell towards the end.
Fun fact. Human race was two times near extinction because of cold weather. Veggies just don't grow very much in ice. Heat, at least till now, did not endanger human race. Not till Gretta came and told us all how wrong we have been .........