CLIMATE FORECAST - HOT OR MAYBE COOL!

I often watch the weather forecast and when it's finished I find myself none the wiser. There are often conflicting forecasts on different channels! In the link below you will see that there is exactly the same problem with their long range predictions. 

Hot Summer? – Met Office Clowns Have Not Got A Clue! | NOT A LOT OF PEOPLE KNOW THAT (wordpress.com)